/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/queue-add-3.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:48:01,362 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:48:01,363 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:48:01,389 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:48:01,417 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:48:01,417 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:48:01,418 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:48:01,419 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 05:48:01,439 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:48:01,439 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:48:01,439 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:48:01,439 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:48:01,440 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:48:01,441 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:48:01,441 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:48:01,441 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:48:01,441 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:48:01,441 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:48:01,441 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:48:01,441 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:48:01,442 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:48:01,442 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:48:01,442 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:48:01,442 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:48:01,442 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:48:01,442 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:48:01,442 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:48:01,442 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:48:01,443 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:48:01,443 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:48:01,443 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:48:01,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:48:01,443 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:48:01,443 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:48:01,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:48:01,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:48:01,444 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:48:01,444 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:48:01,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:48:01,444 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:48:01,733 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:48:01,751 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:48:01,754 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:48:01,755 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:48:01,756 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:48:01,756 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl [2021-06-05 05:48:01,757 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-3.wvr.bpl' [2021-06-05 05:48:01,784 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:48:01,786 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:48:01,787 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:48:01,787 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:48:01,787 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:48:01,798 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,804 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,811 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:48:01,812 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:48:01,812 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:48:01,812 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:48:01,818 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,818 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,819 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,819 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,821 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,826 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,827 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/1) ... [2021-06-05 05:48:01,831 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:48:01,833 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:48:01,834 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:48:01,834 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:48:01,836 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (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 05:48:01,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:48:01,901 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:48:01,901 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:48:01,901 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:48:01,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:48:01,902 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:48:01,902 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:48:01,902 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:48:01,902 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:48:01,902 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:48:01,902 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:48:01,904 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:48:01,904 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 05:48:02,104 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:48:02,105 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:48:02,106 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:48:02 BoogieIcfgContainer [2021-06-05 05:48:02,106 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:48:02,108 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:48:02,108 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:48:02,110 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:48:02,111 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:48:01" (1/2) ... [2021-06-05 05:48:02,111 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@12214099 and model type queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:48:02, skipping insertion in model container [2021-06-05 05:48:02,112 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:48:02" (2/2) ... [2021-06-05 05:48:02,113 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-3.wvr.bpl [2021-06-05 05:48:02,118 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:48:02,118 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:48:02,118 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:48:02,119 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:48:02,162 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-06-05 05:48:02,195 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-06-05 05:48:02,225 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:48:02,225 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:48:02,225 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:48:02,225 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:48:02,226 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:48:02,226 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:48:02,226 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:48:02,226 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:48:02,250 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 45 places, 38 transitions, 100 flow [2021-06-05 05:48:02,319 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 661 states, 659 states have (on average 2.9650986342943852) internal successors, (1954), 660 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand has 661 states, 659 states have (on average 2.9650986342943852) internal successors, (1954), 660 states have internal predecessors, (1954), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,336 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 05:48:02,337 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:02,340 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:02,341 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:02,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:02,345 INFO L82 PathProgramCache]: Analyzing trace with hash -460395558, now seen corresponding path program 1 times [2021-06-05 05:48:02,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:02,354 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657080177] [2021-06-05 05:48:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:02,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:02,507 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 05:48:02,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:02,508 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657080177] [2021-06-05 05:48:02,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657080177] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:02,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:48:02,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:48:02,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105842936] [2021-06-05 05:48:02,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:48:02,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:02,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:48:02,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:02,531 INFO L87 Difference]: Start difference. First operand has 661 states, 659 states have (on average 2.9650986342943852) internal successors, (1954), 660 states have internal predecessors, (1954), 0 states have call successors, (0), 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 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:02,602 INFO L93 Difference]: Finished difference Result 732 states and 2170 transitions. [2021-06-05 05:48:02,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:48:02,604 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 05:48:02,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:02,620 INFO L225 Difference]: With dead ends: 732 [2021-06-05 05:48:02,620 INFO L226 Difference]: Without dead ends: 732 [2021-06-05 05:48:02,621 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2021-06-05 05:48:02,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 732. [2021-06-05 05:48:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 732 states, 731 states have (on average 2.9685362517099865) internal successors, (2170), 731 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 732 states to 732 states and 2170 transitions. [2021-06-05 05:48:02,724 INFO L78 Accepts]: Start accepts. Automaton has 732 states and 2170 transitions. Word has length 21 [2021-06-05 05:48:02,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:02,726 INFO L482 AbstractCegarLoop]: Abstraction has 732 states and 2170 transitions. [2021-06-05 05:48:02,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.0) internal successors, (21), 3 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,726 INFO L276 IsEmpty]: Start isEmpty. Operand 732 states and 2170 transitions. [2021-06-05 05:48:02,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:48:02,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:02,731 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:02,732 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:48:02,732 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:02,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:02,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1781646153, now seen corresponding path program 1 times [2021-06-05 05:48:02,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:02,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73379632] [2021-06-05 05:48:02,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:02,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:02,808 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 05:48:02,808 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:02,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73379632] [2021-06-05 05:48:02,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73379632] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:02,809 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:48:02,809 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:48:02,809 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049432535] [2021-06-05 05:48:02,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:48:02,811 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:02,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:48:02,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:02,813 INFO L87 Difference]: Start difference. First operand 732 states and 2170 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:02,833 INFO L93 Difference]: Finished difference Result 851 states and 2466 transitions. [2021-06-05 05:48:02,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:48:02,834 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-06-05 05:48:02,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:02,840 INFO L225 Difference]: With dead ends: 851 [2021-06-05 05:48:02,840 INFO L226 Difference]: Without dead ends: 769 [2021-06-05 05:48:02,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4.7ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:02,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 769 states. [2021-06-05 05:48:02,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 769 to 769. [2021-06-05 05:48:02,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 769 states, 768 states have (on average 2.91796875) internal successors, (2241), 768 states have internal predecessors, (2241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 769 states to 769 states and 2241 transitions. [2021-06-05 05:48:02,872 INFO L78 Accepts]: Start accepts. Automaton has 769 states and 2241 transitions. Word has length 25 [2021-06-05 05:48:02,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:02,872 INFO L482 AbstractCegarLoop]: Abstraction has 769 states and 2241 transitions. [2021-06-05 05:48:02,873 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 2 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:02,873 INFO L276 IsEmpty]: Start isEmpty. Operand 769 states and 2241 transitions. [2021-06-05 05:48:02,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:48:02,875 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:02,876 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:02,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:48:02,876 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:02,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:02,878 INFO L82 PathProgramCache]: Analyzing trace with hash -510940709, now seen corresponding path program 1 times [2021-06-05 05:48:02,878 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:02,879 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339908843] [2021-06-05 05:48:02,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:02,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:03,046 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 05:48:03,046 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:03,046 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339908843] [2021-06-05 05:48:03,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339908843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:03,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452515595] [2021-06-05 05:48:03,047 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 05:48:03,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:03,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:48:03,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:03,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:03,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1452515595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:03,399 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:03,399 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-06-05 05:48:03,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549176216] [2021-06-05 05:48:03,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:48:03,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:48:03,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:48:03,401 INFO L87 Difference]: Start difference. First operand 769 states and 2241 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:03,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:03,634 INFO L93 Difference]: Finished difference Result 1791 states and 5134 transitions. [2021-06-05 05:48:03,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:48:03,638 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:48:03,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:03,649 INFO L225 Difference]: With dead ends: 1791 [2021-06-05 05:48:03,649 INFO L226 Difference]: Without dead ends: 1732 [2021-06-05 05:48:03,650 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 231.5ms TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:48:03,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1732 states. [2021-06-05 05:48:03,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1732 to 1087. [2021-06-05 05:48:03,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1087 states, 1086 states have (on average 2.8683241252302025) internal successors, (3115), 1086 states have internal predecessors, (3115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:03,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1087 states to 1087 states and 3115 transitions. [2021-06-05 05:48:03,689 INFO L78 Accepts]: Start accepts. Automaton has 1087 states and 3115 transitions. Word has length 30 [2021-06-05 05:48:03,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:03,689 INFO L482 AbstractCegarLoop]: Abstraction has 1087 states and 3115 transitions. [2021-06-05 05:48:03,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:03,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1087 states and 3115 transitions. [2021-06-05 05:48:03,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:48:03,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:03,692 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:03,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2 [2021-06-05 05:48:03,909 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:03,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:03,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1019541771, now seen corresponding path program 2 times [2021-06-05 05:48:03,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:03,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364158313] [2021-06-05 05:48:03,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:03,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:04,040 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 05:48:04,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364158313] [2021-06-05 05:48:04,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364158313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:04,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621607609] [2021-06-05 05:48:04,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:48:04,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:04,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:04,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:48:04,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:04,259 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 05:48:04,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621607609] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:04,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:04,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:48:04,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976605933] [2021-06-05 05:48:04,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:48:04,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:04,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:48:04,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:48:04,261 INFO L87 Difference]: Start difference. First operand 1087 states and 3115 transitions. Second operand has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:04,553 INFO L93 Difference]: Finished difference Result 2154 states and 6168 transitions. [2021-06-05 05:48:04,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:48:04,553 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:48:04,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:04,564 INFO L225 Difference]: With dead ends: 2154 [2021-06-05 05:48:04,564 INFO L226 Difference]: Without dead ends: 2095 [2021-06-05 05:48:04,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 259.5ms TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:48:04,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2095 states. [2021-06-05 05:48:04,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2095 to 1130. [2021-06-05 05:48:04,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1130 states, 1129 states have (on average 2.906997342781222) internal successors, (3282), 1129 states have internal predecessors, (3282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1130 states to 1130 states and 3282 transitions. [2021-06-05 05:48:04,601 INFO L78 Accepts]: Start accepts. Automaton has 1130 states and 3282 transitions. Word has length 30 [2021-06-05 05:48:04,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:04,601 INFO L482 AbstractCegarLoop]: Abstraction has 1130 states and 3282 transitions. [2021-06-05 05:48:04,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.25) internal successors, (51), 11 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1130 states and 3282 transitions. [2021-06-05 05:48:04,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:48:04,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:04,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:04,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:04,821 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:04,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:04,821 INFO L82 PathProgramCache]: Analyzing trace with hash 527270829, now seen corresponding path program 3 times [2021-06-05 05:48:04,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:04,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640268895] [2021-06-05 05:48:04,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:04,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:04,843 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:04,843 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:04,843 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640268895] [2021-06-05 05:48:04,843 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640268895] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:04,844 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:48:04,844 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 05:48:04,844 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153960720] [2021-06-05 05:48:04,844 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:48:04,844 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:04,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:48:04,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:04,845 INFO L87 Difference]: Start difference. First operand 1130 states and 3282 transitions. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:04,856 INFO L93 Difference]: Finished difference Result 999 states and 2818 transitions. [2021-06-05 05:48:04,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:48:04,856 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:48:04,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:04,861 INFO L225 Difference]: With dead ends: 999 [2021-06-05 05:48:04,861 INFO L226 Difference]: Without dead ends: 999 [2021-06-05 05:48:04,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:48:04,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-06-05 05:48:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 999. [2021-06-05 05:48:04,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 999 states, 998 states have (on average 2.823647294589178) internal successors, (2818), 998 states have internal predecessors, (2818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 999 states to 999 states and 2818 transitions. [2021-06-05 05:48:04,888 INFO L78 Accepts]: Start accepts. Automaton has 999 states and 2818 transitions. Word has length 30 [2021-06-05 05:48:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:04,888 INFO L482 AbstractCegarLoop]: Abstraction has 999 states and 2818 transitions. [2021-06-05 05:48:04,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 2 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 999 states and 2818 transitions. [2021-06-05 05:48:04,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-06-05 05:48:04,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:04,892 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:04,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:48:04,893 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:04,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:04,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1610214649, now seen corresponding path program 4 times [2021-06-05 05:48:04,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:04,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769229167] [2021-06-05 05:48:04,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:04,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:04,985 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 05:48:04,985 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:04,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769229167] [2021-06-05 05:48:04,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769229167] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:04,985 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106278914] [2021-06-05 05:48:04,985 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 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 05:48:05,033 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:05,033 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:05,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjunts are in the unsatisfiable core [2021-06-05 05:48:05,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:05,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:05,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106278914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:05,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:05,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 05:48:05,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272562077] [2021-06-05 05:48:05,166 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:48:05,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:05,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:48:05,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:48:05,167 INFO L87 Difference]: Start difference. First operand 999 states and 2818 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 05:48:05,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:05,400 INFO L93 Difference]: Finished difference Result 1442 states and 4013 transitions. [2021-06-05 05:48:05,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:48:05,401 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-06-05 05:48:05,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:05,407 INFO L225 Difference]: With dead ends: 1442 [2021-06-05 05:48:05,407 INFO L226 Difference]: Without dead ends: 1397 [2021-06-05 05:48:05,407 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=102, Invalid=240, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:48:05,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1397 states. [2021-06-05 05:48:05,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1397 to 975. [2021-06-05 05:48:05,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 975 states, 974 states have (on average 2.8213552361396306) internal successors, (2748), 974 states have internal predecessors, (2748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:05,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 975 states to 975 states and 2748 transitions. [2021-06-05 05:48:05,435 INFO L78 Accepts]: Start accepts. Automaton has 975 states and 2748 transitions. Word has length 30 [2021-06-05 05:48:05,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:05,436 INFO L482 AbstractCegarLoop]: Abstraction has 975 states and 2748 transitions. [2021-06-05 05:48:05,436 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 12 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 05:48:05,436 INFO L276 IsEmpty]: Start isEmpty. Operand 975 states and 2748 transitions. [2021-06-05 05:48:05,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:48:05,438 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:05,438 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:05,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:05,656 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:05,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:05,657 INFO L82 PathProgramCache]: Analyzing trace with hash 1829687280, now seen corresponding path program 1 times [2021-06-05 05:48:05,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:05,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185599478] [2021-06-05 05:48:05,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:05,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:05,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:05,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185599478] [2021-06-05 05:48:05,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185599478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:05,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995029647] [2021-06-05 05:48:05,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 05:48:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:48:05,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:05,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:48:05,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:05,810 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:05,810 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 05:48:05,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:48:05,846 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:05,846 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [995029647] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:05,846 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:05,846 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-06-05 05:48:05,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037249386] [2021-06-05 05:48:05,847 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:48:05,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:05,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:48:05,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:48:05,847 INFO L87 Difference]: Start difference. First operand 975 states and 2748 transitions. Second operand has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:05,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:05,928 INFO L93 Difference]: Finished difference Result 1251 states and 3576 transitions. [2021-06-05 05:48:05,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:48:05,928 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-06-05 05:48:05,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:05,934 INFO L225 Difference]: With dead ends: 1251 [2021-06-05 05:48:05,935 INFO L226 Difference]: Without dead ends: 1251 [2021-06-05 05:48:05,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:48:05,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-06-05 05:48:05,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1182. [2021-06-05 05:48:05,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1182 states, 1181 states have (on average 2.852667231160034) internal successors, (3369), 1181 states have internal predecessors, (3369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:05,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1182 states to 1182 states and 3369 transitions. [2021-06-05 05:48:05,968 INFO L78 Accepts]: Start accepts. Automaton has 1182 states and 3369 transitions. Word has length 33 [2021-06-05 05:48:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:05,969 INFO L482 AbstractCegarLoop]: Abstraction has 1182 states and 3369 transitions. [2021-06-05 05:48:05,969 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 5.5) internal successors, (33), 5 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:05,969 INFO L276 IsEmpty]: Start isEmpty. Operand 1182 states and 3369 transitions. [2021-06-05 05:48:05,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-06-05 05:48:05,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:05,973 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:06,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:06,196 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:06,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:06,196 INFO L82 PathProgramCache]: Analyzing trace with hash 125221240, now seen corresponding path program 5 times [2021-06-05 05:48:06,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:06,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020929823] [2021-06-05 05:48:06,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:06,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:06,256 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:06,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:06,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020929823] [2021-06-05 05:48:06,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020929823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:06,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140470034] [2021-06-05 05:48:06,257 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:48:06,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:48:06,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:06,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:48:06,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:06,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:06,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140470034] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:06,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:48:06,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [7] total 9 [2021-06-05 05:48:06,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312755799] [2021-06-05 05:48:06,397 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:48:06,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:06,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:48:06,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:48:06,399 INFO L87 Difference]: Start difference. First operand 1182 states and 3369 transitions. Second operand has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:06,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:06,416 INFO L93 Difference]: Finished difference Result 2091 states and 5916 transitions. [2021-06-05 05:48:06,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:48:06,416 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-06-05 05:48:06,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:06,427 INFO L225 Difference]: With dead ends: 2091 [2021-06-05 05:48:06,427 INFO L226 Difference]: Without dead ends: 2023 [2021-06-05 05:48:06,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 51.0ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:48:06,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2023 states. [2021-06-05 05:48:06,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2023 to 1796. [2021-06-05 05:48:06,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1796 states, 1795 states have (on average 2.8924791086350976) internal successors, (5192), 1795 states have internal predecessors, (5192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:06,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1796 states to 1796 states and 5192 transitions. [2021-06-05 05:48:06,487 INFO L78 Accepts]: Start accepts. Automaton has 1796 states and 5192 transitions. Word has length 34 [2021-06-05 05:48:06,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:06,487 INFO L482 AbstractCegarLoop]: Abstraction has 1796 states and 5192 transitions. [2021-06-05 05:48:06,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 8.25) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:06,487 INFO L276 IsEmpty]: Start isEmpty. Operand 1796 states and 5192 transitions. [2021-06-05 05:48:06,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-06-05 05:48:06,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:06,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1, 1, 1, 1, 1] [2021-06-05 05:48:06,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:06,713 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:06,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:06,713 INFO L82 PathProgramCache]: Analyzing trace with hash -965931544, now seen corresponding path program 2 times [2021-06-05 05:48:06,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:06,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401331200] [2021-06-05 05:48:06,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:06,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:06,799 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:06,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401331200] [2021-06-05 05:48:06,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401331200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:06,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724068089] [2021-06-05 05:48:06,800 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 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 05:48:06,850 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:06,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:06,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjunts are in the unsatisfiable core [2021-06-05 05:48:06,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:06,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:06,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:06,899 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:06,900 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:06,900 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2021-06-05 05:48:06,922 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 05:48:06,923 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:06,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:06,925 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 05:48:06,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:48:06,963 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:06,963 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724068089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:06,963 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:06,963 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-06-05 05:48:06,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997170745] [2021-06-05 05:48:06,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:48:06,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:06,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:48:06,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:48:06,965 INFO L87 Difference]: Start difference. First operand 1796 states and 5192 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 05:48:07,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:07,175 INFO L93 Difference]: Finished difference Result 2323 states and 6719 transitions. [2021-06-05 05:48:07,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:48:07,175 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 38 [2021-06-05 05:48:07,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:07,185 INFO L225 Difference]: With dead ends: 2323 [2021-06-05 05:48:07,185 INFO L226 Difference]: Without dead ends: 2323 [2021-06-05 05:48:07,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 104.1ms TimeCoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:48:07,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2323 states. [2021-06-05 05:48:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2323 to 1767. [2021-06-05 05:48:07,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1767 states, 1766 states have (on average 2.9773499433748585) internal successors, (5258), 1766 states have internal predecessors, (5258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:07,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1767 states to 1767 states and 5258 transitions. [2021-06-05 05:48:07,233 INFO L78 Accepts]: Start accepts. Automaton has 1767 states and 5258 transitions. Word has length 38 [2021-06-05 05:48:07,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:07,233 INFO L482 AbstractCegarLoop]: Abstraction has 1767 states and 5258 transitions. [2021-06-05 05:48:07,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 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 05:48:07,233 INFO L276 IsEmpty]: Start isEmpty. Operand 1767 states and 5258 transitions. [2021-06-05 05:48:07,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:48:07,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:07,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1] [2021-06-05 05:48:07,452 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:07,453 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:07,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:07,453 INFO L82 PathProgramCache]: Analyzing trace with hash 1481304392, now seen corresponding path program 6 times [2021-06-05 05:48:07,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:07,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1335858246] [2021-06-05 05:48:07,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:07,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:07,483 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:07,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:07,483 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1335858246] [2021-06-05 05:48:07,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1335858246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:07,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203037410] [2021-06-05 05:48:07,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:48:07,526 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:48:07,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:07,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 12 conjunts are in the unsatisfiable core [2021-06-05 05:48:07,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:07,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:48:07,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:07,608 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:07,609 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 05:48:07,609 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:14, output treesize:7 [2021-06-05 05:48:07,648 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:07,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203037410] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:07,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:07,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 7 [2021-06-05 05:48:07,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625983661] [2021-06-05 05:48:07,651 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 05:48:07,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:07,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 05:48:07,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:48:07,652 INFO L87 Difference]: Start difference. First operand 1767 states and 5258 transitions. Second operand has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:07,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:07,708 INFO L93 Difference]: Finished difference Result 2051 states and 5911 transitions. [2021-06-05 05:48:07,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:48:07,709 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-06-05 05:48:07,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:07,716 INFO L225 Difference]: With dead ends: 2051 [2021-06-05 05:48:07,716 INFO L226 Difference]: Without dead ends: 1746 [2021-06-05 05:48:07,716 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 39.1ms TimeCoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:48:07,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1746 states. [2021-06-05 05:48:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1746 to 1746. [2021-06-05 05:48:07,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 2.9707736389684816) internal successors, (5184), 1745 states have internal predecessors, (5184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:07,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 5184 transitions. [2021-06-05 05:48:07,755 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 5184 transitions. Word has length 39 [2021-06-05 05:48:07,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:07,755 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 5184 transitions. [2021-06-05 05:48:07,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 6.75) internal successors, (54), 7 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:07,756 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 5184 transitions. [2021-06-05 05:48:07,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:07,760 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:07,760 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:07,982 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:48:07,983 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:07,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:07,983 INFO L82 PathProgramCache]: Analyzing trace with hash 16304851, now seen corresponding path program 3 times [2021-06-05 05:48:07,983 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:07,983 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916061663] [2021-06-05 05:48:07,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:07,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:08,229 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:08,229 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:08,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916061663] [2021-06-05 05:48:08,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916061663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:08,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1381683939] [2021-06-05 05:48:08,229 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 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 05:48:08,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:48:08,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:08,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:48:08,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:08,397 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 05:48:08,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:08,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:08,406 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 05:48:08,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:48:08,439 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 05:48:08,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:08,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:08,447 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 05:48:08,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:08,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:08,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1381683939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:08,644 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:08,644 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 25 [2021-06-05 05:48:08,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981862703] [2021-06-05 05:48:08,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:08,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:08,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:08,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:08,645 INFO L87 Difference]: Start difference. First operand 1746 states and 5184 transitions. Second operand has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:09,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:09,951 INFO L93 Difference]: Finished difference Result 2913 states and 8362 transitions. [2021-06-05 05:48:09,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:48:09,951 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:09,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:09,962 INFO L225 Difference]: With dead ends: 2913 [2021-06-05 05:48:09,963 INFO L226 Difference]: Without dead ends: 2791 [2021-06-05 05:48:09,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 895.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1770, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:48:09,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2791 states. [2021-06-05 05:48:10,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2791 to 2156. [2021-06-05 05:48:10,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2156 states, 2155 states have (on average 2.917401392111369) internal successors, (6287), 2155 states have internal predecessors, (6287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:10,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2156 states to 2156 states and 6287 transitions. [2021-06-05 05:48:10,016 INFO L78 Accepts]: Start accepts. Automaton has 2156 states and 6287 transitions. Word has length 42 [2021-06-05 05:48:10,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:10,016 INFO L482 AbstractCegarLoop]: Abstraction has 2156 states and 6287 transitions. [2021-06-05 05:48:10,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.5384615384615383) internal successors, (66), 25 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:10,017 INFO L276 IsEmpty]: Start isEmpty. Operand 2156 states and 6287 transitions. [2021-06-05 05:48:10,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:10,021 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:10,021 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:10,236 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 05:48:10,237 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:10,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:10,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1358209761, now seen corresponding path program 4 times [2021-06-05 05:48:10,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:10,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490974799] [2021-06-05 05:48:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:10,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:10,472 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:10,472 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490974799] [2021-06-05 05:48:10,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490974799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:10,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18989174] [2021-06-05 05:48:10,473 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 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 05:48:10,527 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:10,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:10,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:10,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:10,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:10,645 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:10,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:10,651 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 05:48:10,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:10,697 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 05:48:10,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:10,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:10,704 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 05:48:10,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:10,837 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:10,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [18989174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:10,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:10,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 23 [2021-06-05 05:48:10,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933841438] [2021-06-05 05:48:10,838 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-06-05 05:48:10,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:10,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-06-05 05:48:10,840 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:48:10,846 INFO L87 Difference]: Start difference. First operand 2156 states and 6287 transitions. Second operand has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:11,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:11,847 INFO L93 Difference]: Finished difference Result 3306 states and 9422 transitions. [2021-06-05 05:48:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:48:11,848 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:11,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:11,856 INFO L225 Difference]: With dead ends: 3306 [2021-06-05 05:48:11,856 INFO L226 Difference]: Without dead ends: 3184 [2021-06-05 05:48:11,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 714.4ms TimeCoverageRelationStatistics Valid=169, Invalid=1391, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:48:11,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3184 states. [2021-06-05 05:48:11,909 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3184 to 2163. [2021-06-05 05:48:11,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2163 states, 2162 states have (on average 2.9167437557816838) internal successors, (6306), 2162 states have internal predecessors, (6306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:11,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2163 states to 2163 states and 6306 transitions. [2021-06-05 05:48:11,918 INFO L78 Accepts]: Start accepts. Automaton has 2163 states and 6306 transitions. Word has length 42 [2021-06-05 05:48:11,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:11,919 INFO L482 AbstractCegarLoop]: Abstraction has 2163 states and 6306 transitions. [2021-06-05 05:48:11,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.75) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:11,919 INFO L276 IsEmpty]: Start isEmpty. Operand 2163 states and 6306 transitions. [2021-06-05 05:48:11,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:11,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:11,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:12,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:12,137 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:12,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:12,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1763071255, now seen corresponding path program 5 times [2021-06-05 05:48:12,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:12,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899947806] [2021-06-05 05:48:12,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:12,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:12,402 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:12,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:12,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899947806] [2021-06-05 05:48:12,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899947806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:12,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132521933] [2021-06-05 05:48:12,403 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 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 05:48:12,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:48:12,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:12,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:48:12,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:12,547 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 05:48:12,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:12,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:12,553 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 05:48:12,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:12,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:12,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:12,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:12,622 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 05:48:12,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:12,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:12,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132521933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:12,751 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:12,751 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 05:48:12,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424401834] [2021-06-05 05:48:12,752 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:48:12,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:12,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:48:12,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:48:12,753 INFO L87 Difference]: Start difference. First operand 2163 states and 6306 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 05:48:13,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:13,738 INFO L93 Difference]: Finished difference Result 3526 states and 10025 transitions. [2021-06-05 05:48:13,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:48:13,739 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 42 [2021-06-05 05:48:13,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:13,746 INFO L225 Difference]: With dead ends: 3526 [2021-06-05 05:48:13,746 INFO L226 Difference]: Without dead ends: 3404 [2021-06-05 05:48:13,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:48:13,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3404 states. [2021-06-05 05:48:13,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3404 to 2248. [2021-06-05 05:48:13,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2248 states, 2247 states have (on average 2.9087672452158433) internal successors, (6536), 2247 states have internal predecessors, (6536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:13,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2248 states to 2248 states and 6536 transitions. [2021-06-05 05:48:13,800 INFO L78 Accepts]: Start accepts. Automaton has 2248 states and 6536 transitions. Word has length 42 [2021-06-05 05:48:13,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:13,800 INFO L482 AbstractCegarLoop]: Abstraction has 2248 states and 6536 transitions. [2021-06-05 05:48:13,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 05:48:13,801 INFO L276 IsEmpty]: Start isEmpty. Operand 2248 states and 6536 transitions. [2021-06-05 05:48:13,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:13,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:13,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:14,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:14,025 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:14,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:14,025 INFO L82 PathProgramCache]: Analyzing trace with hash 297241337, now seen corresponding path program 6 times [2021-06-05 05:48:14,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:14,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436290816] [2021-06-05 05:48:14,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:14,247 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:14,247 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436290816] [2021-06-05 05:48:14,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1436290816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:14,248 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200399887] [2021-06-05 05:48:14,248 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:48:14,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:48:14,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:14,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:48:14,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:14,431 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 05:48:14,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:14,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:14,439 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 05:48:14,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:48:14,491 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:48:14,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:14,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:14,506 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 05:48:14,507 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:14,722 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:14,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200399887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:14,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:14,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 28 [2021-06-05 05:48:14,723 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970580617] [2021-06-05 05:48:14,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-06-05 05:48:14,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:14,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-06-05 05:48:14,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=723, Unknown=0, NotChecked=0, Total=812 [2021-06-05 05:48:14,724 INFO L87 Difference]: Start difference. First operand 2248 states and 6536 transitions. Second operand has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 05:48:15,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:15,903 INFO L93 Difference]: Finished difference Result 3475 states and 9879 transitions. [2021-06-05 05:48:15,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:48:15,904 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 42 [2021-06-05 05:48:15,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:15,911 INFO L225 Difference]: With dead ends: 3475 [2021-06-05 05:48:15,911 INFO L226 Difference]: Without dead ends: 3353 [2021-06-05 05:48:15,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 591 ImplicationChecksByTransitivity, 966.6ms TimeCoverageRelationStatistics Valid=240, Invalid=2210, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:48:15,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-06-05 05:48:15,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2272. [2021-06-05 05:48:15,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2272 states, 2271 states have (on average 2.9114927344782036) internal successors, (6612), 2271 states have internal predecessors, (6612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2272 states to 2272 states and 6612 transitions. [2021-06-05 05:48:15,964 INFO L78 Accepts]: Start accepts. Automaton has 2272 states and 6612 transitions. Word has length 42 [2021-06-05 05:48:15,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:15,964 INFO L482 AbstractCegarLoop]: Abstraction has 2272 states and 6612 transitions. [2021-06-05 05:48:15,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.5172413793103448) internal successors, (73), 28 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 05:48:15,964 INFO L276 IsEmpty]: Start isEmpty. Operand 2272 states and 6612 transitions. [2021-06-05 05:48:15,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:15,968 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:15,968 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:16,190 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 05:48:16,190 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:16,191 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:16,191 INFO L82 PathProgramCache]: Analyzing trace with hash 2110424203, now seen corresponding path program 7 times [2021-06-05 05:48:16,191 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:16,191 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134309348] [2021-06-05 05:48:16,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:16,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:16,423 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:16,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:16,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134309348] [2021-06-05 05:48:16,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134309348] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:16,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551685877] [2021-06-05 05:48:16,423 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 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 05:48:16,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:16,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:16,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:16,591 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 05:48:16,592 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:16,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:16,598 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 05:48:16,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:48:16,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:48:16,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:16,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:16,683 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 05:48:16,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:16,819 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:16,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [551685877] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:16,819 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:16,819 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:48:16,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059798620] [2021-06-05 05:48:16,819 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:48:16,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:16,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:48:16,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:48:16,820 INFO L87 Difference]: Start difference. First operand 2272 states and 6612 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 05:48:18,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:18,111 INFO L93 Difference]: Finished difference Result 4096 states and 11552 transitions. [2021-06-05 05:48:18,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:48:18,111 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 42 [2021-06-05 05:48:18,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:18,119 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 05:48:18,120 INFO L226 Difference]: Without dead ends: 3974 [2021-06-05 05:48:18,120 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 850.5ms TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:18,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-06-05 05:48:18,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 2275. [2021-06-05 05:48:18,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2275 states, 2274 states have (on average 2.9124890061565525) internal successors, (6623), 2274 states have internal predecessors, (6623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:18,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2275 states to 2275 states and 6623 transitions. [2021-06-05 05:48:18,187 INFO L78 Accepts]: Start accepts. Automaton has 2275 states and 6623 transitions. Word has length 42 [2021-06-05 05:48:18,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:18,187 INFO L482 AbstractCegarLoop]: Abstraction has 2275 states and 6623 transitions. [2021-06-05 05:48:18,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 05:48:18,187 INFO L276 IsEmpty]: Start isEmpty. Operand 2275 states and 6623 transitions. [2021-06-05 05:48:18,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:18,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:18,192 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:18,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:48:18,410 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:18,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:18,411 INFO L82 PathProgramCache]: Analyzing trace with hash -1115192543, now seen corresponding path program 8 times [2021-06-05 05:48:18,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:18,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864478009] [2021-06-05 05:48:18,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:18,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:18,643 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:18,643 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:18,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864478009] [2021-06-05 05:48:18,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1864478009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:18,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478011785] [2021-06-05 05:48:18,643 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 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 05:48:18,707 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:18,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:18,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:18,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:18,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:18,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:18,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:18,814 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 05:48:18,815 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:48:18,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:18,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:18,891 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:18,891 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 05:48:18,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:19,011 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:19,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478011785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:19,011 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:19,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:48:19,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230318122] [2021-06-05 05:48:19,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:48:19,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:19,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:48:19,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:48:19,013 INFO L87 Difference]: Start difference. First operand 2275 states and 6623 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 05:48:20,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:20,427 INFO L93 Difference]: Finished difference Result 4339 states and 12285 transitions. [2021-06-05 05:48:20,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:48:20,428 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 42 [2021-06-05 05:48:20,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:20,434 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 05:48:20,435 INFO L226 Difference]: Without dead ends: 4217 [2021-06-05 05:48:20,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 931.7ms TimeCoverageRelationStatistics Valid=237, Invalid=2213, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:48:20,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4217 states. [2021-06-05 05:48:20,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4217 to 2311. [2021-06-05 05:48:20,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2311 states, 2310 states have (on average 2.9294372294372293) internal successors, (6767), 2310 states have internal predecessors, (6767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:20,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2311 states to 2311 states and 6767 transitions. [2021-06-05 05:48:20,491 INFO L78 Accepts]: Start accepts. Automaton has 2311 states and 6767 transitions. Word has length 42 [2021-06-05 05:48:20,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:20,491 INFO L482 AbstractCegarLoop]: Abstraction has 2311 states and 6767 transitions. [2021-06-05 05:48:20,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 05:48:20,491 INFO L276 IsEmpty]: Start isEmpty. Operand 2311 states and 6767 transitions. [2021-06-05 05:48:20,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:20,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:20,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:20,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:48:20,713 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:20,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:20,713 INFO L82 PathProgramCache]: Analyzing trace with hash 374723421, now seen corresponding path program 9 times [2021-06-05 05:48:20,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:20,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [981342735] [2021-06-05 05:48:20,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:20,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:21,004 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:21,004 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:21,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [981342735] [2021-06-05 05:48:21,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [981342735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:21,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879917708] [2021-06-05 05:48:21,005 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 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 05:48:21,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:48:21,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:21,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:21,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:21,140 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:21,141 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:21,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:21,147 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 05:48:21,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:48:21,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:48:21,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:21,197 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:21,198 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 05:48:21,198 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:21,339 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:21,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879917708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:21,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:21,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:48:21,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515574664] [2021-06-05 05:48:21,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:48:21,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:21,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:48:21,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:48:21,341 INFO L87 Difference]: Start difference. First operand 2311 states and 6767 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 05:48:22,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:22,863 INFO L93 Difference]: Finished difference Result 4522 states and 12854 transitions. [2021-06-05 05:48:22,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:48:22,863 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 42 [2021-06-05 05:48:22,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:22,871 INFO L225 Difference]: With dead ends: 4522 [2021-06-05 05:48:22,871 INFO L226 Difference]: Without dead ends: 4400 [2021-06-05 05:48:22,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1032.1ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:48:22,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4400 states. [2021-06-05 05:48:22,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4400 to 2330. [2021-06-05 05:48:22,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 2.9373121511378275) internal successors, (6841), 2329 states have internal predecessors, (6841), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:22,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 6841 transitions. [2021-06-05 05:48:22,967 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 6841 transitions. Word has length 42 [2021-06-05 05:48:22,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:22,967 INFO L482 AbstractCegarLoop]: Abstraction has 2330 states and 6841 transitions. [2021-06-05 05:48:22,968 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 05:48:22,968 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 6841 transitions. [2021-06-05 05:48:22,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:22,972 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:22,972 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:23,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:23,197 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:23,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:23,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1968823617, now seen corresponding path program 10 times [2021-06-05 05:48:23,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:23,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853339864] [2021-06-05 05:48:23,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:23,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:23,461 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:23,461 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:23,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853339864] [2021-06-05 05:48:23,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853339864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:23,461 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10592565] [2021-06-05 05:48:23,461 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 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 05:48:23,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:23,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:23,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:23,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:23,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:48:23,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:23,597 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:23,597 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 05:48:23,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:48:23,641 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 05:48:23,642 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:23,646 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:23,647 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 05:48:23,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:23,794 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:23,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10592565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:23,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:23,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:48:23,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41564642] [2021-06-05 05:48:23,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:48:23,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:23,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:48:23,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:48:23,796 INFO L87 Difference]: Start difference. First operand 2330 states and 6841 transitions. Second operand has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 05:48:25,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:25,347 INFO L93 Difference]: Finished difference Result 5127 states and 14673 transitions. [2021-06-05 05:48:25,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:48:25,348 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 42 [2021-06-05 05:48:25,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:25,354 INFO L225 Difference]: With dead ends: 5127 [2021-06-05 05:48:25,354 INFO L226 Difference]: Without dead ends: 5014 [2021-06-05 05:48:25,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 1089.1ms TimeCoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:48:25,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-06-05 05:48:25,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 2408. [2021-06-05 05:48:25,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2408 states, 2407 states have (on average 2.966348151225592) internal successors, (7140), 2407 states have internal predecessors, (7140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2408 states to 2408 states and 7140 transitions. [2021-06-05 05:48:25,411 INFO L78 Accepts]: Start accepts. Automaton has 2408 states and 7140 transitions. Word has length 42 [2021-06-05 05:48:25,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:25,411 INFO L482 AbstractCegarLoop]: Abstraction has 2408 states and 7140 transitions. [2021-06-05 05:48:25,412 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.7037037037037037) internal successors, (73), 26 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 05:48:25,412 INFO L276 IsEmpty]: Start isEmpty. Operand 2408 states and 7140 transitions. [2021-06-05 05:48:25,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:25,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:25,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:25,637 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:48:25,638 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:25,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:25,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1999273139, now seen corresponding path program 11 times [2021-06-05 05:48:25,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:25,638 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994539476] [2021-06-05 05:48:25,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:25,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:25,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 14 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:48:25,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:25,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994539476] [2021-06-05 05:48:25,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994539476] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:48:25,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:48:25,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:48:25,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834688131] [2021-06-05 05:48:25,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:48:25,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:25,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:48:25,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:48:25,657 INFO L87 Difference]: Start difference. First operand 2408 states and 7140 transitions. Second operand has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:25,677 INFO L93 Difference]: Finished difference Result 5624 states and 16348 transitions. [2021-06-05 05:48:25,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:48:25,677 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:25,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:25,683 INFO L225 Difference]: With dead ends: 5624 [2021-06-05 05:48:25,683 INFO L226 Difference]: Without dead ends: 5361 [2021-06-05 05:48:25,683 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.3ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:48:25,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-05 05:48:25,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4595. [2021-06-05 05:48:25,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4595 states, 4594 states have (on average 2.994122768828907) internal successors, (13755), 4594 states have internal predecessors, (13755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4595 states to 4595 states and 13755 transitions. [2021-06-05 05:48:25,770 INFO L78 Accepts]: Start accepts. Automaton has 4595 states and 13755 transitions. Word has length 42 [2021-06-05 05:48:25,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:25,770 INFO L482 AbstractCegarLoop]: Abstraction has 4595 states and 13755 transitions. [2021-06-05 05:48:25,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 8.4) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:25,770 INFO L276 IsEmpty]: Start isEmpty. Operand 4595 states and 13755 transitions. [2021-06-05 05:48:25,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:25,777 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:25,777 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:25,777 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2021-06-05 05:48:25,777 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:25,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:25,777 INFO L82 PathProgramCache]: Analyzing trace with hash -2131149121, now seen corresponding path program 12 times [2021-06-05 05:48:25,777 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:25,777 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562464137] [2021-06-05 05:48:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:25,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:25,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562464137] [2021-06-05 05:48:25,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562464137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:25,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900310006] [2021-06-05 05:48:25,987 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 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 05:48:26,018 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:48:26,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:26,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:48:26,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:26,089 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:26,090 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:26,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:26,095 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 05:48:26,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:26,184 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 05:48:26,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:26,190 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:26,191 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 05:48:26,191 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:26,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:26,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1900310006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:26,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:26,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:48:26,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460957574] [2021-06-05 05:48:26,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:26,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:26,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:26,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:26,339 INFO L87 Difference]: Start difference. First operand 4595 states and 13755 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:27,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:27,260 INFO L93 Difference]: Finished difference Result 5285 states and 15482 transitions. [2021-06-05 05:48:27,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:48:27,261 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:27,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:27,267 INFO L225 Difference]: With dead ends: 5285 [2021-06-05 05:48:27,267 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 05:48:27,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 738.8ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:48:27,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 05:48:27,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4600. [2021-06-05 05:48:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4600 states, 4599 states have (on average 2.994998912807132) internal successors, (13774), 4599 states have internal predecessors, (13774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:27,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4600 states to 4600 states and 13774 transitions. [2021-06-05 05:48:27,349 INFO L78 Accepts]: Start accepts. Automaton has 4600 states and 13774 transitions. Word has length 42 [2021-06-05 05:48:27,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:27,349 INFO L482 AbstractCegarLoop]: Abstraction has 4600 states and 13774 transitions. [2021-06-05 05:48:27,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:27,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4600 states and 13774 transitions. [2021-06-05 05:48:27,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:27,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:27,357 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:27,580 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:27,581 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:27,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:27,581 INFO L82 PathProgramCache]: Analyzing trace with hash -1061798571, now seen corresponding path program 13 times [2021-06-05 05:48:27,581 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:27,581 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058729553] [2021-06-05 05:48:27,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:27,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:27,807 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:27,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:27,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058729553] [2021-06-05 05:48:27,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058729553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:27,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108836781] [2021-06-05 05:48:27,808 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 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 05:48:27,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:27,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:27,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:27,978 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 05:48:27,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:27,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:27,985 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 05:48:27,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:28,071 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 05:48:28,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:28,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:28,078 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 05:48:28,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:28,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108836781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:28,199 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:28,199 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:48:28,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179701940] [2021-06-05 05:48:28,200 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:28,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:28,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:28,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:28,200 INFO L87 Difference]: Start difference. First operand 4600 states and 13774 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:29,455 INFO L93 Difference]: Finished difference Result 5862 states and 16975 transitions. [2021-06-05 05:48:29,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:48:29,455 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:29,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:29,461 INFO L225 Difference]: With dead ends: 5862 [2021-06-05 05:48:29,461 INFO L226 Difference]: Without dead ends: 5641 [2021-06-05 05:48:29,462 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 884.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1863, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:48:29,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2021-06-05 05:48:29,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 4612. [2021-06-05 05:48:29,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4612 states, 4611 states have (on average 2.9969637822598134) internal successors, (13819), 4611 states have internal predecessors, (13819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4612 states to 4612 states and 13819 transitions. [2021-06-05 05:48:29,537 INFO L78 Accepts]: Start accepts. Automaton has 4612 states and 13819 transitions. Word has length 42 [2021-06-05 05:48:29,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:29,537 INFO L482 AbstractCegarLoop]: Abstraction has 4612 states and 13819 transitions. [2021-06-05 05:48:29,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:29,537 INFO L276 IsEmpty]: Start isEmpty. Operand 4612 states and 13819 transitions. [2021-06-05 05:48:29,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:29,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:29,545 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:29,767 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:48:29,767 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:29,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:29,768 INFO L82 PathProgramCache]: Analyzing trace with hash 428117393, now seen corresponding path program 14 times [2021-06-05 05:48:29,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:29,768 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665066975] [2021-06-05 05:48:29,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:29,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:29,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:29,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:29,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665066975] [2021-06-05 05:48:29,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665066975] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:29,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812231706] [2021-06-05 05:48:29,973 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 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 05:48:30,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:30,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:30,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:30,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:30,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:30,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:30,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:30,096 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 05:48:30,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:30,143 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 05:48:30,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:30,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:30,149 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 05:48:30,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:30,293 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:30,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812231706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:30,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:30,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:48:30,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379060469] [2021-06-05 05:48:30,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:30,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:30,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:30,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:30,294 INFO L87 Difference]: Start difference. First operand 4612 states and 13819 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:31,645 INFO L93 Difference]: Finished difference Result 6189 states and 17997 transitions. [2021-06-05 05:48:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:48:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:31,652 INFO L225 Difference]: With dead ends: 6189 [2021-06-05 05:48:31,652 INFO L226 Difference]: Without dead ends: 5968 [2021-06-05 05:48:31,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 806.9ms TimeCoverageRelationStatistics Valid=205, Invalid=1865, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:48:31,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5968 states. [2021-06-05 05:48:31,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5968 to 4616. [2021-06-05 05:48:31,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.996749729144095) internal successors, (13830), 4615 states have internal predecessors, (13830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:31,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13830 transitions. [2021-06-05 05:48:31,731 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13830 transitions. Word has length 42 [2021-06-05 05:48:31,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:31,731 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13830 transitions. [2021-06-05 05:48:31,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:31,731 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13830 transitions. [2021-06-05 05:48:31,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:31,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:31,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:31,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-06-05 05:48:31,953 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:31,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:31,953 INFO L82 PathProgramCache]: Analyzing trace with hash 2022217589, now seen corresponding path program 15 times [2021-06-05 05:48:31,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:31,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1080154047] [2021-06-05 05:48:31,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:31,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:32,179 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:32,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:32,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1080154047] [2021-06-05 05:48:32,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1080154047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:32,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806935263] [2021-06-05 05:48:32,180 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 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 05:48:32,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:48:32,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:48:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:32,312 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:32,313 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:32,318 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:32,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:32,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:32,365 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 05:48:32,366 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:32,371 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:32,371 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 05:48:32,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:32,538 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:32,539 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806935263] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:32,539 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:32,539 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:48:32,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400878397] [2021-06-05 05:48:32,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:32,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:32,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:32,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:32,540 INFO L87 Difference]: Start difference. First operand 4616 states and 13830 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:33,769 INFO L93 Difference]: Finished difference Result 7088 states and 20488 transitions. [2021-06-05 05:48:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:48:33,770 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:33,778 INFO L225 Difference]: With dead ends: 7088 [2021-06-05 05:48:33,778 INFO L226 Difference]: Without dead ends: 6902 [2021-06-05 05:48:33,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 867.1ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:48:33,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6902 states. [2021-06-05 05:48:33,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6902 to 4597. [2021-06-05 05:48:33,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 2.9945604873803306) internal successors, (13763), 4596 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:33,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 13763 transitions. [2021-06-05 05:48:33,852 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 13763 transitions. Word has length 42 [2021-06-05 05:48:33,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:33,852 INFO L482 AbstractCegarLoop]: Abstraction has 4597 states and 13763 transitions. [2021-06-05 05:48:33,852 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:33,852 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 13763 transitions. [2021-06-05 05:48:33,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:33,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:33,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:34,080 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:48:34,081 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash -227017667, now seen corresponding path program 16 times [2021-06-05 05:48:34,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:34,081 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393721687] [2021-06-05 05:48:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:34,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:34,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393721687] [2021-06-05 05:48:34,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393721687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:34,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568034454] [2021-06-05 05:48:34,350 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 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 05:48:34,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:34,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:34,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:34,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:34,448 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 05:48:34,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:34,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:34,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:34,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:34,508 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 05:48:34,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:34,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:34,528 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 05:48:34,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:34,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:34,654 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1568034454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:34,654 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:34,654 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 05:48:34,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944332616] [2021-06-05 05:48:34,654 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:48:34,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:34,654 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:48:34,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=529, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:48:34,655 INFO L87 Difference]: Start difference. First operand 4597 states and 13763 transitions. Second operand has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 05:48:35,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:35,555 INFO L93 Difference]: Finished difference Result 5261 states and 15418 transitions. [2021-06-05 05:48:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:48:35,556 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 42 [2021-06-05 05:48:35,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:35,562 INFO L225 Difference]: With dead ends: 5261 [2021-06-05 05:48:35,562 INFO L226 Difference]: Without dead ends: 5040 [2021-06-05 05:48:35,562 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 748.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:48:35,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5040 states. [2021-06-05 05:48:35,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5040 to 4604. [2021-06-05 05:48:35,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4604 states, 4603 states have (on average 2.9941342602650445) internal successors, (13782), 4603 states have internal predecessors, (13782), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:35,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4604 states to 4604 states and 13782 transitions. [2021-06-05 05:48:35,637 INFO L78 Accepts]: Start accepts. Automaton has 4604 states and 13782 transitions. Word has length 42 [2021-06-05 05:48:35,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:35,637 INFO L482 AbstractCegarLoop]: Abstraction has 4604 states and 13782 transitions. [2021-06-05 05:48:35,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.84) internal successors, (71), 24 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 05:48:35,637 INFO L276 IsEmpty]: Start isEmpty. Operand 4604 states and 13782 transitions. [2021-06-05 05:48:35,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:35,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:35,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:35,844 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 05:48:35,844 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:35,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:35,844 INFO L82 PathProgramCache]: Analyzing trace with hash 997433393, now seen corresponding path program 17 times [2021-06-05 05:48:35,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:35,845 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857694373] [2021-06-05 05:48:35,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:35,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:36,064 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857694373] [2021-06-05 05:48:36,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857694373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:36,064 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377217024] [2021-06-05 05:48:36,068 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 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 05:48:36,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:48:36,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:36,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:48:36,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:36,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:36,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:36,198 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:36,199 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 05:48:36,199 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:36,259 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:36,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:36,265 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:36,266 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:36,266 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:36,372 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:36,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [377217024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:36,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:36,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 24 [2021-06-05 05:48:36,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167524759] [2021-06-05 05:48:36,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-06-05 05:48:36,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:36,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-06-05 05:48:36,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=525, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:48:36,374 INFO L87 Difference]: Start difference. First operand 4604 states and 13782 transitions. Second operand has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 05:48:37,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:37,239 INFO L93 Difference]: Finished difference Result 5518 states and 16059 transitions. [2021-06-05 05:48:37,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:48:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 42 [2021-06-05 05:48:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:37,245 INFO L225 Difference]: With dead ends: 5518 [2021-06-05 05:48:37,245 INFO L226 Difference]: Without dead ends: 5297 [2021-06-05 05:48:37,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 712.2ms TimeCoverageRelationStatistics Valid=183, Invalid=1539, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:48:37,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2021-06-05 05:48:37,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 4597. [2021-06-05 05:48:37,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4597 states, 4596 states have (on average 2.9945604873803306) internal successors, (13763), 4596 states have internal predecessors, (13763), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:37,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4597 states to 4597 states and 13763 transitions. [2021-06-05 05:48:37,295 INFO L78 Accepts]: Start accepts. Automaton has 4597 states and 13763 transitions. Word has length 42 [2021-06-05 05:48:37,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:37,295 INFO L482 AbstractCegarLoop]: Abstraction has 4597 states and 13763 transitions. [2021-06-05 05:48:37,295 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.76) internal successors, (69), 24 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 05:48:37,295 INFO L276 IsEmpty]: Start isEmpty. Operand 4597 states and 13763 transitions. [2021-06-05 05:48:37,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:37,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:37,301 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:37,501 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-06-05 05:48:37,502 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:37,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:37,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1021009315, now seen corresponding path program 18 times [2021-06-05 05:48:37,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:37,502 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [473551296] [2021-06-05 05:48:37,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:37,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:37,728 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:37,728 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:37,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [473551296] [2021-06-05 05:48:37,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [473551296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:37,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48822563] [2021-06-05 05:48:37,728 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 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 05:48:37,762 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:48:37,762 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:37,763 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:37,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:37,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:37,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:37,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:37,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:37,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:37,974 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:37,975 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:37,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:37,982 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 05:48:37,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:38,109 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:38,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [48822563] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:38,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:38,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:48:38,110 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145027681] [2021-06-05 05:48:38,110 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:38,110 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:38,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:38,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:38,111 INFO L87 Difference]: Start difference. First operand 4597 states and 13763 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:39,321 INFO L93 Difference]: Finished difference Result 6016 states and 17495 transitions. [2021-06-05 05:48:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:48:39,322 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:39,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:39,328 INFO L225 Difference]: With dead ends: 6016 [2021-06-05 05:48:39,329 INFO L226 Difference]: Without dead ends: 5795 [2021-06-05 05:48:39,329 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 876.5ms TimeCoverageRelationStatistics Valid=218, Invalid=1852, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:48:39,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5795 states. [2021-06-05 05:48:39,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5795 to 4617. [2021-06-05 05:48:39,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4616 states have (on average 2.997833622183709) internal successors, (13838), 4616 states have internal predecessors, (13838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 13838 transitions. [2021-06-05 05:48:39,423 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 13838 transitions. Word has length 42 [2021-06-05 05:48:39,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:39,423 INFO L482 AbstractCegarLoop]: Abstraction has 4617 states and 13838 transitions. [2021-06-05 05:48:39,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:39,423 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 13838 transitions. [2021-06-05 05:48:39,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:39,427 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:39,428 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:39,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:39,637 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:39,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:39,637 INFO L82 PathProgramCache]: Analyzing trace with hash 468906649, now seen corresponding path program 19 times [2021-06-05 05:48:39,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:39,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047091249] [2021-06-05 05:48:39,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:39,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:39,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:39,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047091249] [2021-06-05 05:48:39,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047091249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:39,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368911632] [2021-06-05 05:48:39,864 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 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 05:48:39,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:39,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:39,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:39,984 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 05:48:39,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:39,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:39,992 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 05:48:39,992 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:40,037 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 05:48:40,038 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:40,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:40,043 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 05:48:40,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:40,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:40,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [368911632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:40,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:40,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:48:40,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602332361] [2021-06-05 05:48:40,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:40,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:40,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:40,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:40,197 INFO L87 Difference]: Start difference. First operand 4617 states and 13838 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:41,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:41,384 INFO L93 Difference]: Finished difference Result 6525 states and 18951 transitions. [2021-06-05 05:48:41,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:48:41,384 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:41,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:41,391 INFO L225 Difference]: With dead ends: 6525 [2021-06-05 05:48:41,391 INFO L226 Difference]: Without dead ends: 6304 [2021-06-05 05:48:41,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 858.9ms TimeCoverageRelationStatistics Valid=213, Invalid=1857, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:48:41,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6304 states. [2021-06-05 05:48:41,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6304 to 4621. [2021-06-05 05:48:41,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4621 states, 4620 states have (on average 2.9976190476190476) internal successors, (13849), 4620 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:41,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4621 states to 4621 states and 13849 transitions. [2021-06-05 05:48:41,464 INFO L78 Accepts]: Start accepts. Automaton has 4621 states and 13849 transitions. Word has length 42 [2021-06-05 05:48:41,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:41,464 INFO L482 AbstractCegarLoop]: Abstraction has 4621 states and 13849 transitions. [2021-06-05 05:48:41,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:41,464 INFO L276 IsEmpty]: Start isEmpty. Operand 4621 states and 13849 transitions. [2021-06-05 05:48:41,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:41,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:41,468 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:41,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:48:41,673 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:41,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:41,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2063006845, now seen corresponding path program 20 times [2021-06-05 05:48:41,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:41,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [88775057] [2021-06-05 05:48:41,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:41,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:41,865 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:41,865 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [88775057] [2021-06-05 05:48:41,865 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [88775057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:41,865 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461628170] [2021-06-05 05:48:41,865 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 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 05:48:41,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:41,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:41,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:48:41,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:41,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:41,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:41,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:41,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:41,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-06-05 05:48:42,014 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 05:48:42,015 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:42,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:42,022 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 05:48:42,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:42,167 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:42,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461628170] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:42,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:42,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:48:42,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276462612] [2021-06-05 05:48:42,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:42,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:42,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:42,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=577, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:42,168 INFO L87 Difference]: Start difference. First operand 4621 states and 13849 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:43,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:43,503 INFO L93 Difference]: Finished difference Result 7424 states and 21442 transitions. [2021-06-05 05:48:43,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:48:43,504 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:43,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:43,512 INFO L225 Difference]: With dead ends: 7424 [2021-06-05 05:48:43,512 INFO L226 Difference]: Without dead ends: 7238 [2021-06-05 05:48:43,513 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 873.0ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:48:43,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7238 states. [2021-06-05 05:48:43,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7238 to 4605. [2021-06-05 05:48:43,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.995873153779322) internal successors, (13793), 4604 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:43,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 13793 transitions. [2021-06-05 05:48:43,592 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 13793 transitions. Word has length 42 [2021-06-05 05:48:43,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:43,592 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 13793 transitions. [2021-06-05 05:48:43,592 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:43,592 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 13793 transitions. [2021-06-05 05:48:43,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:43,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:43,597 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:43,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:43,798 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:43,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:43,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1949908255, now seen corresponding path program 21 times [2021-06-05 05:48:43,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:43,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585309459] [2021-06-05 05:48:43,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:43,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:44,054 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:44,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585309459] [2021-06-05 05:48:44,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585309459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:44,055 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805032805] [2021-06-05 05:48:44,055 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 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 05:48:44,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:48:44,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:44,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:48:44,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:44,172 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 05:48:44,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:44,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:44,179 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 05:48:44,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:44,256 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 05:48:44,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:44,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:44,263 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 05:48:44,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:44,394 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:44,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805032805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:44,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:44,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:48:44,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677825074] [2021-06-05 05:48:44,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:48:44,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:44,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:48:44,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:48:44,396 INFO L87 Difference]: Start difference. First operand 4605 states and 13793 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:45,538 INFO L93 Difference]: Finished difference Result 5827 states and 16946 transitions. [2021-06-05 05:48:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:48:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:45,545 INFO L225 Difference]: With dead ends: 5827 [2021-06-05 05:48:45,545 INFO L226 Difference]: Without dead ends: 5606 [2021-06-05 05:48:45,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 470 ImplicationChecksByTransitivity, 854.9ms TimeCoverageRelationStatistics Valid=230, Invalid=1932, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:48:45,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5606 states. [2021-06-05 05:48:45,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5606 to 4605. [2021-06-05 05:48:45,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4605 states, 4604 states have (on average 2.995873153779322) internal successors, (13793), 4604 states have internal predecessors, (13793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:45,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4605 states to 4605 states and 13793 transitions. [2021-06-05 05:48:45,619 INFO L78 Accepts]: Start accepts. Automaton has 4605 states and 13793 transitions. Word has length 42 [2021-06-05 05:48:45,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:45,620 INFO L482 AbstractCegarLoop]: Abstraction has 4605 states and 13793 transitions. [2021-06-05 05:48:45,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 25 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:45,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4605 states and 13793 transitions. [2021-06-05 05:48:45,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:45,624 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:45,624 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:45,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:48:45,825 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash 1599704497, now seen corresponding path program 22 times [2021-06-05 05:48:45,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:45,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330044448] [2021-06-05 05:48:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:45,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:46,068 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:46,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330044448] [2021-06-05 05:48:46,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330044448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:46,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330896856] [2021-06-05 05:48:46,069 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 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 05:48:46,110 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:46,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:46,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:46,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:46,214 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 05:48:46,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:46,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:46,225 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 05:48:46,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:48:46,338 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 05:48:46,339 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:46,344 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:46,345 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 05:48:46,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:46,471 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:46,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [330896856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:46,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:46,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:48:46,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842811411] [2021-06-05 05:48:46,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:48:46,472 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:46,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:48:46,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:48:46,472 INFO L87 Difference]: Start difference. First operand 4605 states and 13793 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:47,371 INFO L93 Difference]: Finished difference Result 5154 states and 15161 transitions. [2021-06-05 05:48:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:48:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:47,376 INFO L225 Difference]: With dead ends: 5154 [2021-06-05 05:48:47,377 INFO L226 Difference]: Without dead ends: 4933 [2021-06-05 05:48:47,377 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 839.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:48:47,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-06-05 05:48:47,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4611. [2021-06-05 05:48:47,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4611 states, 4610 states have (on average 2.996095444685466) internal successors, (13812), 4610 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:47,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4611 states to 4611 states and 13812 transitions. [2021-06-05 05:48:47,427 INFO L78 Accepts]: Start accepts. Automaton has 4611 states and 13812 transitions. Word has length 42 [2021-06-05 05:48:47,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:47,427 INFO L482 AbstractCegarLoop]: Abstraction has 4611 states and 13812 transitions. [2021-06-05 05:48:47,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:47,427 INFO L276 IsEmpty]: Start isEmpty. Operand 4611 states and 13812 transitions. [2021-06-05 05:48:47,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:47,431 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:47,431 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:47,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:47,632 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:47,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:47,632 INFO L82 PathProgramCache]: Analyzing trace with hash -1625912249, now seen corresponding path program 23 times [2021-06-05 05:48:47,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:47,632 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303806135] [2021-06-05 05:48:47,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:47,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:47,855 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:47,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:47,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303806135] [2021-06-05 05:48:47,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303806135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:47,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [295158986] [2021-06-05 05:48:47,855 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 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 05:48:47,902 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:47,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:47,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:47,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:48,028 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:48,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:48,037 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:48,038 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 05:48:48,038 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:48:48,166 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 05:48:48,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:48,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:48,174 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 05:48:48,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:48,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:48,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [295158986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:48,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:48,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 05:48:48,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920716318] [2021-06-05 05:48:48,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:48:48,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:48,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:48:48,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:48:48,339 INFO L87 Difference]: Start difference. First operand 4611 states and 13812 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:49,391 INFO L93 Difference]: Finished difference Result 5518 states and 16071 transitions. [2021-06-05 05:48:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:48:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:49,397 INFO L225 Difference]: With dead ends: 5518 [2021-06-05 05:48:49,397 INFO L226 Difference]: Without dead ends: 5297 [2021-06-05 05:48:49,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 637 ImplicationChecksByTransitivity, 1037.6ms TimeCoverageRelationStatistics Valid=247, Invalid=2405, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:48:49,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5297 states. [2021-06-05 05:48:49,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5297 to 4623. [2021-06-05 05:48:49,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4623 states, 4622 states have (on average 2.998052790999567) internal successors, (13857), 4622 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4623 states to 4623 states and 13857 transitions. [2021-06-05 05:48:49,455 INFO L78 Accepts]: Start accepts. Automaton has 4623 states and 13857 transitions. Word has length 42 [2021-06-05 05:48:49,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:49,455 INFO L482 AbstractCegarLoop]: Abstraction has 4623 states and 13857 transitions. [2021-06-05 05:48:49,455 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:49,455 INFO L276 IsEmpty]: Start isEmpty. Operand 4623 states and 13857 transitions. [2021-06-05 05:48:49,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:49,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:49,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:49,675 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-06-05 05:48:49,675 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash -135996285, now seen corresponding path program 24 times [2021-06-05 05:48:49,676 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:49,676 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146053734] [2021-06-05 05:48:49,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:49,906 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:49,907 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:49,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146053734] [2021-06-05 05:48:49,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146053734] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:49,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750303593] [2021-06-05 05:48:49,907 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 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 05:48:49,950 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:48:49,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:49,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:49,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:50,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:50,047 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:50,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:50,056 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 05:48:50,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:48:50,130 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 05:48:50,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:50,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:50,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:50,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:50,311 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:50,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750303593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:50,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:50,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:48:50,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656319217] [2021-06-05 05:48:50,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:48:50,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:50,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:48:50,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:48:50,312 INFO L87 Difference]: Start difference. First operand 4623 states and 13857 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:51,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:51,412 INFO L93 Difference]: Finished difference Result 5689 states and 16671 transitions. [2021-06-05 05:48:51,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:48:51,412 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:51,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:51,418 INFO L225 Difference]: With dead ends: 5689 [2021-06-05 05:48:51,418 INFO L226 Difference]: Without dead ends: 5468 [2021-06-05 05:48:51,419 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 929.1ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:48:51,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5468 states. [2021-06-05 05:48:51,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5468 to 4627. [2021-06-05 05:48:51,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.9978383052313013) internal successors, (13868), 4626 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:51,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13868 transitions. [2021-06-05 05:48:51,474 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13868 transitions. Word has length 42 [2021-06-05 05:48:51,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:51,475 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13868 transitions. [2021-06-05 05:48:51,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:51,475 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13868 transitions. [2021-06-05 05:48:51,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:51,481 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:51,481 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:51,688 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:51,689 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1458103911, now seen corresponding path program 25 times [2021-06-05 05:48:51,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:51,689 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370661350] [2021-06-05 05:48:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:51,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:51,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:51,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:51,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370661350] [2021-06-05 05:48:51,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370661350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:51,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337940069] [2021-06-05 05:48:51,896 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 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 05:48:51,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:51,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:51,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:52,020 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 05:48:52,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:52,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:52,029 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 05:48:52,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:48:52,109 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 05:48:52,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:52,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:52,115 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 05:48:52,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:52,251 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:52,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337940069] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:52,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:52,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:48:52,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714731377] [2021-06-05 05:48:52,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:48:52,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:48:52,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:48:52,253 INFO L87 Difference]: Start difference. First operand 4627 states and 13868 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:53,538 INFO L93 Difference]: Finished difference Result 6127 states and 17962 transitions. [2021-06-05 05:48:53,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:48:53,539 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:53,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:53,545 INFO L225 Difference]: With dead ends: 6127 [2021-06-05 05:48:53,546 INFO L226 Difference]: Without dead ends: 5941 [2021-06-05 05:48:53,546 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 978.1ms TimeCoverageRelationStatistics Valid=226, Invalid=2224, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:48:53,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5941 states. [2021-06-05 05:48:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5941 to 4608. [2021-06-05 05:48:53,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4608 states, 4607 states have (on average 2.9956587801172128) internal successors, (13801), 4607 states have internal predecessors, (13801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4608 states to 4608 states and 13801 transitions. [2021-06-05 05:48:53,601 INFO L78 Accepts]: Start accepts. Automaton has 4608 states and 13801 transitions. Word has length 42 [2021-06-05 05:48:53,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:53,602 INFO L482 AbstractCegarLoop]: Abstraction has 4608 states and 13801 transitions. [2021-06-05 05:48:53,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:53,602 INFO L276 IsEmpty]: Start isEmpty. Operand 4608 states and 13801 transitions. [2021-06-05 05:48:53,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:53,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:53,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:53,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-06-05 05:48:53,808 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:53,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:53,808 INFO L82 PathProgramCache]: Analyzing trace with hash -202854927, now seen corresponding path program 26 times [2021-06-05 05:48:53,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:53,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698747380] [2021-06-05 05:48:53,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:53,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:54,008 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:54,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:54,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698747380] [2021-06-05 05:48:54,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698747380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:54,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564488654] [2021-06-05 05:48:54,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:48:54,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:54,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:54,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:54,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:54,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:54,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:54,131 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:54,132 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 05:48:54,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:48:54,181 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 05:48:54,182 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:54,188 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:54,201 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 05:48:54,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:48:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:54,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564488654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:54,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:54,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:48:54,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326205617] [2021-06-05 05:48:54,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:48:54,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:54,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:48:54,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:48:54,380 INFO L87 Difference]: Start difference. First operand 4608 states and 13801 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:55,238 INFO L93 Difference]: Finished difference Result 5246 states and 15565 transitions. [2021-06-05 05:48:55,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:48:55,239 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:55,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:55,244 INFO L225 Difference]: With dead ends: 5246 [2021-06-05 05:48:55,244 INFO L226 Difference]: Without dead ends: 5025 [2021-06-05 05:48:55,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:48:55,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5025 states. [2021-06-05 05:48:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5025 to 4628. [2021-06-05 05:48:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.99459693105684) internal successors, (13856), 4627 states have internal predecessors, (13856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13856 transitions. [2021-06-05 05:48:55,298 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13856 transitions. Word has length 42 [2021-06-05 05:48:55,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:55,298 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13856 transitions. [2021-06-05 05:48:55,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:55,298 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13856 transitions. [2021-06-05 05:48:55,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:55,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:55,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:55,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:48:55,520 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:55,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:55,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1391245269, now seen corresponding path program 27 times [2021-06-05 05:48:55,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:55,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285946690] [2021-06-05 05:48:55,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:55,749 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:55,749 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:55,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285946690] [2021-06-05 05:48:55,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1285946690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:55,749 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939647745] [2021-06-05 05:48:55,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:48:55,795 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:48:55,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:55,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:48:55,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:55,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:55,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:55,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:55,887 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:55,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 05:48:55,935 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 05:48:55,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:55,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:55,942 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 05:48:55,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:48:56,135 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:56,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939647745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:56,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:56,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:48:56,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508557042] [2021-06-05 05:48:56,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:48:56,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:56,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:48:56,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:48:56,136 INFO L87 Difference]: Start difference. First operand 4628 states and 13856 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:57,081 INFO L93 Difference]: Finished difference Result 5612 states and 16671 transitions. [2021-06-05 05:48:57,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:48:57,082 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:57,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:57,088 INFO L225 Difference]: With dead ends: 5612 [2021-06-05 05:48:57,088 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 05:48:57,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 819.3ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:48:57,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 05:48:57,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 4624. [2021-06-05 05:48:57,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4624 states, 4623 states have (on average 2.9948085658663204) internal successors, (13845), 4623 states have internal predecessors, (13845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4624 states to 4624 states and 13845 transitions. [2021-06-05 05:48:57,141 INFO L78 Accepts]: Start accepts. Automaton has 4624 states and 13845 transitions. Word has length 42 [2021-06-05 05:48:57,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:57,141 INFO L482 AbstractCegarLoop]: Abstraction has 4624 states and 13845 transitions. [2021-06-05 05:48:57,141 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:57,141 INFO L276 IsEmpty]: Start isEmpty. Operand 4624 states and 13845 transitions. [2021-06-05 05:48:57,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:57,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:57,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:57,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:48:57,350 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:57,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:57,351 INFO L82 PathProgramCache]: Analyzing trace with hash -1423564845, now seen corresponding path program 28 times [2021-06-05 05:48:57,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:57,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903284196] [2021-06-05 05:48:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:57,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:57,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:57,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:57,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903284196] [2021-06-05 05:48:57,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903284196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:57,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248175951] [2021-06-05 05:48:57,578 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 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 05:48:57,623 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:48:57,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:57,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:57,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:57,719 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 05:48:57,720 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:57,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:57,728 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 05:48:57,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:48:57,782 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 05:48:57,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:57,790 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:57,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:48:57,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:48:58,006 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:58,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248175951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:58,006 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:58,006 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:48:58,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493602179] [2021-06-05 05:48:58,007 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:48:58,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:58,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:48:58,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:48:58,007 INFO L87 Difference]: Start difference. First operand 4624 states and 13845 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:58,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:48:58,933 INFO L93 Difference]: Finished difference Result 5503 states and 16361 transitions. [2021-06-05 05:48:58,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:48:58,933 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:48:58,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:48:58,940 INFO L225 Difference]: With dead ends: 5503 [2021-06-05 05:48:58,940 INFO L226 Difference]: Without dead ends: 5317 [2021-06-05 05:48:58,940 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 862.0ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:48:58,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5317 states. [2021-06-05 05:48:58,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5317 to 4636. [2021-06-05 05:48:58,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:59,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 05:48:59,003 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 05:48:59,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:48:59,003 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 05:48:59,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:48:59,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 05:48:59,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:48:59,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:48:59,009 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:48:59,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:48:59,231 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:48:59,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:48:59,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1528185143, now seen corresponding path program 29 times [2021-06-05 05:48:59,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:48:59,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454327807] [2021-06-05 05:48:59,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:48:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:48:59,440 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:48:59,440 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:48:59,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454327807] [2021-06-05 05:48:59,440 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454327807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:59,440 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392485497] [2021-06-05 05:48:59,440 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 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 05:48:59,475 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:48:59,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:48:59,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:48:59,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:48:59,560 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:48:59,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:59,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:59,568 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 05:48:59,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:48:59,671 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 05:48:59,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:48:59,676 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:48:59,677 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 05:48:59,677 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:48:59,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:48:59,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392485497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:48:59,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:48:59,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 05:48:59,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800384477] [2021-06-05 05:48:59,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:48:59,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:48:59,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:48:59,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:48:59,836 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:00,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:00,927 INFO L93 Difference]: Finished difference Result 5218 states and 15352 transitions. [2021-06-05 05:49:00,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:49:00,928 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:00,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:00,934 INFO L225 Difference]: With dead ends: 5218 [2021-06-05 05:49:00,934 INFO L226 Difference]: Without dead ends: 4997 [2021-06-05 05:49:00,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 978.4ms TimeCoverageRelationStatistics Valid=248, Invalid=2404, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:49:00,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4997 states. [2021-06-05 05:49:00,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4997 to 4648. [2021-06-05 05:49:00,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 2.9952657628577577) internal successors, (13919), 4647 states have internal predecessors, (13919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:00,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 13919 transitions. [2021-06-05 05:49:00,990 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 13919 transitions. Word has length 42 [2021-06-05 05:49:00,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:00,990 INFO L482 AbstractCegarLoop]: Abstraction has 4648 states and 13919 transitions. [2021-06-05 05:49:00,990 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:00,990 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 13919 transitions. [2021-06-05 05:49:00,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:00,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:00,995 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:01,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:49:01,197 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:01,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:01,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1276866189, now seen corresponding path program 30 times [2021-06-05 05:49:01,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:01,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432522228] [2021-06-05 05:49:01,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:01,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:01,422 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:01,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:01,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432522228] [2021-06-05 05:49:01,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432522228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:01,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210392207] [2021-06-05 05:49:01,423 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 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 05:49:01,456 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:49:01,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:01,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:01,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:01,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:01,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:01,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:01,555 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 05:49:01,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:49:01,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:49:01,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:01,656 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:01,657 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 05:49:01,657 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:01,839 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:01,839 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210392207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:01,839 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:01,839 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:01,840 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108613988] [2021-06-05 05:49:01,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:01,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:01,841 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:01,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:01,841 INFO L87 Difference]: Start difference. First operand 4648 states and 13919 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:02,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:02,885 INFO L93 Difference]: Finished difference Result 5672 states and 16626 transitions. [2021-06-05 05:49:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:49:02,886 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:02,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:02,892 INFO L225 Difference]: With dead ends: 5672 [2021-06-05 05:49:02,892 INFO L226 Difference]: Without dead ends: 5451 [2021-06-05 05:49:02,892 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 963.8ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:49:02,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5451 states. [2021-06-05 05:49:02,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5451 to 4652. [2021-06-05 05:49:02,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9950548269189423) internal successors, (13930), 4651 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:02,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13930 transitions. [2021-06-05 05:49:02,944 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13930 transitions. Word has length 42 [2021-06-05 05:49:02,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:02,944 INFO L482 AbstractCegarLoop]: Abstraction has 4652 states and 13930 transitions. [2021-06-05 05:49:02,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:02,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13930 transitions. [2021-06-05 05:49:02,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:02,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:02,948 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:03,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:49:03,150 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:03,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:03,150 INFO L82 PathProgramCache]: Analyzing trace with hash 317234007, now seen corresponding path program 31 times [2021-06-05 05:49:03,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:03,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420861332] [2021-06-05 05:49:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:03,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:03,382 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:03,382 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:03,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420861332] [2021-06-05 05:49:03,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420861332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:03,382 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1146886270] [2021-06-05 05:49:03,382 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 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 05:49:03,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:03,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:03,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:03,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:49:03,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:03,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:03,504 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 05:49:03,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:49:03,600 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 05:49:03,601 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:03,606 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:03,606 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 05:49:03,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:03,743 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:03,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1146886270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:03,744 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:03,744 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:03,744 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058213684] [2021-06-05 05:49:03,744 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:03,744 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:03,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:03,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:03,745 INFO L87 Difference]: Start difference. First operand 4652 states and 13930 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:04,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:04,962 INFO L93 Difference]: Finished difference Result 6058 states and 17770 transitions. [2021-06-05 05:49:04,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:49:04,962 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:04,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:04,969 INFO L225 Difference]: With dead ends: 6058 [2021-06-05 05:49:04,969 INFO L226 Difference]: Without dead ends: 5872 [2021-06-05 05:49:04,970 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 972.0ms TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:49:04,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5872 states. [2021-06-05 05:49:05,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5872 to 4636. [2021-06-05 05:49:05,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 05:49:05,026 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 05:49:05,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:05,026 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 05:49:05,026 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:05,026 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 05:49:05,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:05,031 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:05,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:05,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-06-05 05:49:05,231 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:05,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:05,232 INFO L82 PathProgramCache]: Analyzing trace with hash -1040049667, now seen corresponding path program 32 times [2021-06-05 05:49:05,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:05,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1543675911] [2021-06-05 05:49:05,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:05,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:05,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:05,454 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:05,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1543675911] [2021-06-05 05:49:05,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1543675911] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:05,454 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1259528050] [2021-06-05 05:49:05,454 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 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 05:49:05,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:05,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:49:05,492 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:05,550 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:05,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:05,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:05,558 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 05:49:05,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:05,679 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 05:49:05,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:05,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:05,685 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 05:49:05,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:05,796 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:05,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1259528050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:05,796 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:05,796 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:05,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [713272601] [2021-06-05 05:49:05,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:05,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:05,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:05,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:05,797 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:06,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:06,738 INFO L93 Difference]: Finished difference Result 5185 states and 15242 transitions. [2021-06-05 05:49:06,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:49:06,739 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:06,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:06,744 INFO L225 Difference]: With dead ends: 5185 [2021-06-05 05:49:06,744 INFO L226 Difference]: Without dead ends: 4964 [2021-06-05 05:49:06,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 771.0ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:49:06,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4964 states. [2021-06-05 05:49:06,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4964 to 4642. [2021-06-05 05:49:06,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4642 states, 4641 states have (on average 2.993535875888817) internal successors, (13893), 4641 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:06,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4642 states to 4642 states and 13893 transitions. [2021-06-05 05:49:06,793 INFO L78 Accepts]: Start accepts. Automaton has 4642 states and 13893 transitions. Word has length 42 [2021-06-05 05:49:06,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:06,793 INFO L482 AbstractCegarLoop]: Abstraction has 4642 states and 13893 transitions. [2021-06-05 05:49:06,793 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:06,794 INFO L276 IsEmpty]: Start isEmpty. Operand 4642 states and 13893 transitions. [2021-06-05 05:49:06,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:06,798 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:06,798 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:06,999 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:49:06,999 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:06,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:06,999 INFO L82 PathProgramCache]: Analyzing trace with hash 29300883, now seen corresponding path program 33 times [2021-06-05 05:49:06,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:07,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899010273] [2021-06-05 05:49:07,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:07,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:07,219 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:07,220 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:07,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899010273] [2021-06-05 05:49:07,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [899010273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:07,220 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865737163] [2021-06-05 05:49:07,220 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 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 05:49:07,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:49:07,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:07,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:07,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:07,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:07,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:07,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:07,331 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 05:49:07,331 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:07,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:07,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:07,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:07,472 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 05:49:07,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:49:07,621 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:07,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865737163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:07,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:07,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:07,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509031044] [2021-06-05 05:49:07,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:07,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:07,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:07,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:07,623 INFO L87 Difference]: Start difference. First operand 4642 states and 13893 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:08,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:08,848 INFO L93 Difference]: Finished difference Result 5549 states and 16152 transitions. [2021-06-05 05:49:08,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:49:08,849 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:08,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:08,854 INFO L225 Difference]: With dead ends: 5549 [2021-06-05 05:49:08,854 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 05:49:08,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 923.0ms TimeCoverageRelationStatistics Valid=217, Invalid=2039, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:49:08,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 05:49:08,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4654. [2021-06-05 05:49:08,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4654 states, 4653 states have (on average 2.995486782720825) internal successors, (13938), 4653 states have internal predecessors, (13938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:08,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4654 states to 4654 states and 13938 transitions. [2021-06-05 05:49:08,904 INFO L78 Accepts]: Start accepts. Automaton has 4654 states and 13938 transitions. Word has length 42 [2021-06-05 05:49:08,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:08,904 INFO L482 AbstractCegarLoop]: Abstraction has 4654 states and 13938 transitions. [2021-06-05 05:49:08,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:08,904 INFO L276 IsEmpty]: Start isEmpty. Operand 4654 states and 13938 transitions. [2021-06-05 05:49:08,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:08,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:08,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:09,110 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 05:49:09,112 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:09,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:09,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1519216847, now seen corresponding path program 34 times [2021-06-05 05:49:09,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:09,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370594149] [2021-06-05 05:49:09,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:09,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:09,319 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:09,319 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370594149] [2021-06-05 05:49:09,319 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370594149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:09,319 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412831660] [2021-06-05 05:49:09,319 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 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 05:49:09,349 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:09,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:09,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:09,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:09,406 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 05:49:09,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:09,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:09,413 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 05:49:09,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:09,508 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 05:49:09,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:09,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:09,513 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 05:49:09,514 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:09,648 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:09,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412831660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:09,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:09,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:09,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688061318] [2021-06-05 05:49:09,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:09,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:09,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:09,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=675, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:09,650 INFO L87 Difference]: Start difference. First operand 4654 states and 13938 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:10,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:10,786 INFO L93 Difference]: Finished difference Result 5720 states and 16752 transitions. [2021-06-05 05:49:10,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:49:10,786 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:10,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:10,792 INFO L225 Difference]: With dead ends: 5720 [2021-06-05 05:49:10,792 INFO L226 Difference]: Without dead ends: 5499 [2021-06-05 05:49:10,793 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 853.2ms TimeCoverageRelationStatistics Valid=215, Invalid=2041, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:49:10,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5499 states. [2021-06-05 05:49:10,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5499 to 4658. [2021-06-05 05:49:10,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4658 states, 4657 states have (on average 2.9952759287094697) internal successors, (13949), 4657 states have internal predecessors, (13949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:10,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4658 states to 4658 states and 13949 transitions. [2021-06-05 05:49:10,844 INFO L78 Accepts]: Start accepts. Automaton has 4658 states and 13949 transitions. Word has length 42 [2021-06-05 05:49:10,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:10,844 INFO L482 AbstractCegarLoop]: Abstraction has 4658 states and 13949 transitions. [2021-06-05 05:49:10,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:10,844 INFO L276 IsEmpty]: Start isEmpty. Operand 4658 states and 13949 transitions. [2021-06-05 05:49:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:10,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:10,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:11,049 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:11,050 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:11,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:11,050 INFO L82 PathProgramCache]: Analyzing trace with hash -1181650253, now seen corresponding path program 35 times [2021-06-05 05:49:11,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:11,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807220834] [2021-06-05 05:49:11,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:11,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:11,264 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:11,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:11,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807220834] [2021-06-05 05:49:11,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807220834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:11,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815776902] [2021-06-05 05:49:11,264 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 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 05:49:11,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:11,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:11,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:11,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:11,447 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:11,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:11,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:11,455 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 05:49:11,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:11,551 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 05:49:11,553 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:11,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:11,560 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 05:49:11,560 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:11,737 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:11,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [815776902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:11,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:11,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 05:49:11,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549381331] [2021-06-05 05:49:11,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:49:11,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:11,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:49:11,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:11,739 INFO L87 Difference]: Start difference. First operand 4658 states and 13949 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:13,133 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:13,133 INFO L93 Difference]: Finished difference Result 6225 states and 18189 transitions. [2021-06-05 05:49:13,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:49:13,133 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:13,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:13,140 INFO L225 Difference]: With dead ends: 6225 [2021-06-05 05:49:13,141 INFO L226 Difference]: Without dead ends: 5937 [2021-06-05 05:49:13,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1026.3ms TimeCoverageRelationStatistics Valid=275, Invalid=2695, Unknown=0, NotChecked=0, Total=2970 [2021-06-05 05:49:13,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5937 states. [2021-06-05 05:49:13,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5937 to 4639. [2021-06-05 05:49:13,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.993100474342389) internal successors, (13882), 4638 states have internal predecessors, (13882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:13,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13882 transitions. [2021-06-05 05:49:13,195 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13882 transitions. Word has length 42 [2021-06-05 05:49:13,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:13,195 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13882 transitions. [2021-06-05 05:49:13,195 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:13,195 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13882 transitions. [2021-06-05 05:49:13,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:13,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:13,200 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:13,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:13,401 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:13,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:13,401 INFO L82 PathProgramCache]: Analyzing trace with hash 1452358205, now seen corresponding path program 36 times [2021-06-05 05:49:13,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:13,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554648591] [2021-06-05 05:49:13,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:13,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:13,628 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:13,628 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:13,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554648591] [2021-06-05 05:49:13,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554648591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:13,628 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023312129] [2021-06-05 05:49:13,628 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 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 05:49:13,658 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:49:13,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:13,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:13,659 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:13,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:13,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:13,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:13,730 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:13,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:13,816 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 05:49:13,817 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:13,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:13,825 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 05:49:13,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:14,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023312129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:14,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:14,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:14,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749044848] [2021-06-05 05:49:14,022 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:14,022 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:14,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:14,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:14,022 INFO L87 Difference]: Start difference. First operand 4639 states and 13882 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:14,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:14,944 INFO L93 Difference]: Finished difference Result 5277 states and 15646 transitions. [2021-06-05 05:49:14,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:49:14,944 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:14,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:14,950 INFO L225 Difference]: With dead ends: 5277 [2021-06-05 05:49:14,950 INFO L226 Difference]: Without dead ends: 5056 [2021-06-05 05:49:14,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 810.4ms TimeCoverageRelationStatistics Valid=186, Invalid=1706, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:49:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5056 states. [2021-06-05 05:49:14,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5056 to 4659. [2021-06-05 05:49:14,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 2.9920566766852725) internal successors, (13937), 4658 states have internal predecessors, (13937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 13937 transitions. [2021-06-05 05:49:15,000 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 13937 transitions. Word has length 42 [2021-06-05 05:49:15,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:15,000 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 13937 transitions. [2021-06-05 05:49:15,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:15,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 13937 transitions. [2021-06-05 05:49:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:15,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:15,005 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:15,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:15,211 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1248508895, now seen corresponding path program 37 times [2021-06-05 05:49:15,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:15,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704574231] [2021-06-05 05:49:15,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:15,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:15,409 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:15,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:15,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704574231] [2021-06-05 05:49:15,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704574231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:15,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107615055] [2021-06-05 05:49:15,410 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 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 05:49:15,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:15,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:15,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:15,497 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 05:49:15,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:15,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:15,504 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 05:49:15,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:15,572 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 05:49:15,573 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:15,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:15,580 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 05:49:15,580 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:15,771 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:15,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107615055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:15,771 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:15,771 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:15,771 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226677433] [2021-06-05 05:49:15,771 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:15,771 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:15,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:15,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:15,772 INFO L87 Difference]: Start difference. First operand 4659 states and 13937 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:16,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:16,728 INFO L93 Difference]: Finished difference Result 5643 states and 16752 transitions. [2021-06-05 05:49:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:49:16,729 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:16,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:16,734 INFO L225 Difference]: With dead ends: 5643 [2021-06-05 05:49:16,734 INFO L226 Difference]: Without dead ends: 5457 [2021-06-05 05:49:16,735 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 829.9ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:49:16,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5457 states. [2021-06-05 05:49:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5457 to 4655. [2021-06-05 05:49:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.9922647185217017) internal successors, (13926), 4654 states have internal predecessors, (13926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:16,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13926 transitions. [2021-06-05 05:49:16,784 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13926 transitions. Word has length 42 [2021-06-05 05:49:16,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:16,784 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13926 transitions. [2021-06-05 05:49:16,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:16,784 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13926 transitions. [2021-06-05 05:49:16,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:16,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:16,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:16,989 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 05:49:16,989 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:16,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:16,990 INFO L82 PathProgramCache]: Analyzing trace with hash 231648287, now seen corresponding path program 38 times [2021-06-05 05:49:16,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:16,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344401269] [2021-06-05 05:49:16,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:16,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:17,204 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:17,204 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:17,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344401269] [2021-06-05 05:49:17,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344401269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:17,204 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288405893] [2021-06-05 05:49:17,204 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 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 05:49:17,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:17,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:17,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:49:17,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:17,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:17,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:17,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:17,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:17,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:17,378 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 05:49:17,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:17,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:17,385 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:17,385 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:17,550 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:17,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288405893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:17,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:17,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:17,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119250089] [2021-06-05 05:49:17,551 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:17,551 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:17,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:17,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:17,551 INFO L87 Difference]: Start difference. First operand 4655 states and 13926 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:18,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:18,515 INFO L93 Difference]: Finished difference Result 5534 states and 16442 transitions. [2021-06-05 05:49:18,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:49:18,520 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:18,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:18,526 INFO L225 Difference]: With dead ends: 5534 [2021-06-05 05:49:18,526 INFO L226 Difference]: Without dead ends: 5348 [2021-06-05 05:49:18,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 780.2ms TimeCoverageRelationStatistics Valid=188, Invalid=1704, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:49:18,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5348 states. [2021-06-05 05:49:18,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5348 to 4651. [2021-06-05 05:49:18,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.99247311827957) internal successors, (13915), 4650 states have internal predecessors, (13915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:18,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13915 transitions. [2021-06-05 05:49:18,579 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13915 transitions. Word has length 42 [2021-06-05 05:49:18,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:18,579 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13915 transitions. [2021-06-05 05:49:18,579 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:18,579 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13915 transitions. [2021-06-05 05:49:18,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:18,584 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:18,584 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:18,784 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:18,784 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:18,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:18,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1111569021, now seen corresponding path program 39 times [2021-06-05 05:49:18,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:18,785 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005518770] [2021-06-05 05:49:18,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:18,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:18,981 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:18,981 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:18,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005518770] [2021-06-05 05:49:18,981 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005518770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:18,981 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926152704] [2021-06-05 05:49:18,981 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 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 05:49:19,011 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:49:19,011 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:19,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:19,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:19,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:19,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:19,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:19,077 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 05:49:19,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:19,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:19,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:19,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:19,202 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 05:49:19,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:49:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:19,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [926152704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:19,344 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:19,345 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:19,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373246962] [2021-06-05 05:49:19,345 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:19,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:19,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:19,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:19,345 INFO L87 Difference]: Start difference. First operand 4651 states and 13915 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:20,499 INFO L93 Difference]: Finished difference Result 5233 states and 15393 transitions. [2021-06-05 05:49:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:49:20,499 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:20,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:20,505 INFO L225 Difference]: With dead ends: 5233 [2021-06-05 05:49:20,505 INFO L226 Difference]: Without dead ends: 5012 [2021-06-05 05:49:20,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 888.4ms TimeCoverageRelationStatistics Valid=218, Invalid=2038, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:49:20,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5012 states. [2021-06-05 05:49:20,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5012 to 4663. [2021-06-05 05:49:20,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 2.9944229944229943) internal successors, (13960), 4662 states have internal predecessors, (13960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:20,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 13960 transitions. [2021-06-05 05:49:20,554 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 13960 transitions. Word has length 42 [2021-06-05 05:49:20,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:20,555 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 13960 transitions. [2021-06-05 05:49:20,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:20,555 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 13960 transitions. [2021-06-05 05:49:20,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:20,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:20,559 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:20,760 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:20,760 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:20,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:20,760 INFO L82 PathProgramCache]: Analyzing trace with hash 378346943, now seen corresponding path program 40 times [2021-06-05 05:49:20,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:20,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802563380] [2021-06-05 05:49:20,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:20,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:21,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:21,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:21,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802563380] [2021-06-05 05:49:21,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802563380] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:21,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732482155] [2021-06-05 05:49:21,002 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 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 05:49:21,047 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:21,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:21,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:21,118 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 05:49:21,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:21,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:21,126 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 05:49:21,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:21,240 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 05:49:21,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:21,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:21,248 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 05:49:21,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:21,416 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:21,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1732482155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:21,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:21,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:21,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561795155] [2021-06-05 05:49:21,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:21,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:21,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:21,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:21,417 INFO L87 Difference]: Start difference. First operand 4663 states and 13960 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:22,615 INFO L93 Difference]: Finished difference Result 5695 states and 16689 transitions. [2021-06-05 05:49:22,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:49:22,615 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:22,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:22,622 INFO L225 Difference]: With dead ends: 5695 [2021-06-05 05:49:22,622 INFO L226 Difference]: Without dead ends: 5474 [2021-06-05 05:49:22,622 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 969.8ms TimeCoverageRelationStatistics Valid=216, Invalid=2040, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:49:22,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5474 states. [2021-06-05 05:49:22,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5474 to 4667. [2021-06-05 05:49:22,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 2.994213459065581) internal successors, (13971), 4666 states have internal predecessors, (13971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 13971 transitions. [2021-06-05 05:49:22,675 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 13971 transitions. Word has length 42 [2021-06-05 05:49:22,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:22,675 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 13971 transitions. [2021-06-05 05:49:22,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:22,675 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 13971 transitions. [2021-06-05 05:49:22,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:22,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:22,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:22,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 05:49:22,880 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:22,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:22,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1972447139, now seen corresponding path program 41 times [2021-06-05 05:49:22,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:22,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1190854884] [2021-06-05 05:49:22,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:22,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:23,119 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:23,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:23,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1190854884] [2021-06-05 05:49:23,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1190854884] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:23,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54525449] [2021-06-05 05:49:23,119 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 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 05:49:23,155 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:23,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:23,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:23,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:23,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:23,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:23,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:23,247 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 05:49:23,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:23,345 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 05:49:23,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:23,350 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:23,351 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 05:49:23,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:23,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:23,533 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [54525449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:23,533 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:23,533 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 05:49:23,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344436488] [2021-06-05 05:49:23,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:49:23,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:23,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:49:23,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:49:23,534 INFO L87 Difference]: Start difference. First operand 4667 states and 13971 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:25,048 INFO L93 Difference]: Finished difference Result 6156 states and 17997 transitions. [2021-06-05 05:49:25,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:49:25,049 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:25,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:25,055 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 05:49:25,055 INFO L226 Difference]: Without dead ends: 5868 [2021-06-05 05:49:25,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 728 ImplicationChecksByTransitivity, 1056.3ms TimeCoverageRelationStatistics Valid=284, Invalid=2796, Unknown=0, NotChecked=0, Total=3080 [2021-06-05 05:49:25,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5868 states. [2021-06-05 05:49:25,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5868 to 4636. [2021-06-05 05:49:25,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 05:49:25,110 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 05:49:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:25,110 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 05:49:25,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 05:49:25,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:25,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:25,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:25,315 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-06-05 05:49:25,315 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:25,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:25,315 INFO L82 PathProgramCache]: Analyzing trace with hash -324907291, now seen corresponding path program 42 times [2021-06-05 05:49:25,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:25,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013990643] [2021-06-05 05:49:25,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:25,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:25,517 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:25,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:25,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013990643] [2021-06-05 05:49:25,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013990643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:25,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [501222586] [2021-06-05 05:49:25,518 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 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 05:49:25,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:49:25,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:25,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:49:25,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:25,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:25,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:25,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:25,613 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 05:49:25,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:25,712 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 05:49:25,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:25,717 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:25,718 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 05:49:25,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:25,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [501222586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:25,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:25,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:49:25,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290753245] [2021-06-05 05:49:25,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:25,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:25,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:25,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:25,829 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:26,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:26,807 INFO L93 Difference]: Finished difference Result 5469 states and 15943 transitions. [2021-06-05 05:49:26,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:49:26,808 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:26,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:26,814 INFO L225 Difference]: With dead ends: 5469 [2021-06-05 05:49:26,814 INFO L226 Difference]: Without dead ends: 5248 [2021-06-05 05:49:26,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:49:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2021-06-05 05:49:26,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 4639. [2021-06-05 05:49:26,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.99374730487279) internal successors, (13885), 4638 states have internal predecessors, (13885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:26,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13885 transitions. [2021-06-05 05:49:26,867 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13885 transitions. Word has length 42 [2021-06-05 05:49:26,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:26,867 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13885 transitions. [2021-06-05 05:49:26,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:26,867 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13885 transitions. [2021-06-05 05:49:26,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:26,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:26,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:27,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:49:27,072 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:27,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:27,072 INFO L82 PathProgramCache]: Analyzing trace with hash 744443259, now seen corresponding path program 43 times [2021-06-05 05:49:27,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:27,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722833243] [2021-06-05 05:49:27,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:27,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:27,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:27,292 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:27,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722833243] [2021-06-05 05:49:27,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722833243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:27,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107848239] [2021-06-05 05:49:27,292 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 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 05:49:27,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:27,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:27,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:27,438 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 05:49:27,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:27,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:27,445 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 05:49:27,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:27,550 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 05:49:27,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:27,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:27,558 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 05:49:27,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:27,676 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:27,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107848239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:27,676 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:27,676 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:49:27,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203338049] [2021-06-05 05:49:27,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:27,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:27,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:27,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:27,677 INFO L87 Difference]: Start difference. First operand 4639 states and 13885 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:28,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:28,875 INFO L93 Difference]: Finished difference Result 5756 states and 16705 transitions. [2021-06-05 05:49:28,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:49:28,875 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:28,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:28,881 INFO L225 Difference]: With dead ends: 5756 [2021-06-05 05:49:28,881 INFO L226 Difference]: Without dead ends: 5535 [2021-06-05 05:49:28,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 909.9ms TimeCoverageRelationStatistics Valid=230, Invalid=2122, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:49:28,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5535 states. [2021-06-05 05:49:28,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5535 to 4651. [2021-06-05 05:49:28,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.9956989247311827) internal successors, (13930), 4650 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13930 transitions. [2021-06-05 05:49:28,930 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13930 transitions. Word has length 42 [2021-06-05 05:49:28,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:28,930 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13930 transitions. [2021-06-05 05:49:28,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:28,930 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13930 transitions. [2021-06-05 05:49:28,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:28,934 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:28,934 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:29,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:29,135 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:29,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:29,135 INFO L82 PathProgramCache]: Analyzing trace with hash -2060608073, now seen corresponding path program 44 times [2021-06-05 05:49:29,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:29,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662133835] [2021-06-05 05:49:29,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:29,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:29,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:29,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:29,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662133835] [2021-06-05 05:49:29,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662133835] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:29,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182494746] [2021-06-05 05:49:29,350 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 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 05:49:29,398 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:29,398 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:29,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:29,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:29,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:29,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:29,471 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:29,472 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 05:49:29,472 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:29,560 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 05:49:29,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:29,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:29,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:29,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:29,710 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:29,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182494746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:29,711 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:29,711 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:49:29,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753113376] [2021-06-05 05:49:29,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:29,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:29,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:29,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:29,712 INFO L87 Difference]: Start difference. First operand 4651 states and 13930 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:31,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:31,053 INFO L93 Difference]: Finished difference Result 5951 states and 17366 transitions. [2021-06-05 05:49:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:49:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:31,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:31,060 INFO L225 Difference]: With dead ends: 5951 [2021-06-05 05:49:31,060 INFO L226 Difference]: Without dead ends: 5730 [2021-06-05 05:49:31,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 525 ImplicationChecksByTransitivity, 933.1ms TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:49:31,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5730 states. [2021-06-05 05:49:31,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5730 to 4655. [2021-06-05 05:49:31,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.995487752470993) internal successors, (13941), 4654 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:31,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13941 transitions. [2021-06-05 05:49:31,114 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13941 transitions. Word has length 42 [2021-06-05 05:49:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:31,115 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13941 transitions. [2021-06-05 05:49:31,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13941 transitions. [2021-06-05 05:49:31,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:31,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:31,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:31,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:31,321 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:31,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:31,321 INFO L82 PathProgramCache]: Analyzing trace with hash -466507877, now seen corresponding path program 45 times [2021-06-05 05:49:31,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:31,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143537624] [2021-06-05 05:49:31,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:31,563 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:31,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143537624] [2021-06-05 05:49:31,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143537624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:31,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2116442144] [2021-06-05 05:49:31,563 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 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 05:49:31,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:49:31,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:31,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:49:31,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:31,662 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:31,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:31,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:31,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:31,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:31,741 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 05:49:31,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:31,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:31,746 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 05:49:31,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:31,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2116442144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:31,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:31,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:49:31,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780419619] [2021-06-05 05:49:31,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:31,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:31,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:31,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:31,881 INFO L87 Difference]: Start difference. First operand 4655 states and 13941 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:33,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:33,066 INFO L93 Difference]: Finished difference Result 6545 states and 19010 transitions. [2021-06-05 05:49:33,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:49:33,067 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:33,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:33,074 INFO L225 Difference]: With dead ends: 6545 [2021-06-05 05:49:33,074 INFO L226 Difference]: Without dead ends: 6359 [2021-06-05 05:49:33,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 967.9ms TimeCoverageRelationStatistics Valid=239, Invalid=2311, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:49:33,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6359 states. [2021-06-05 05:49:33,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6359 to 4636. [2021-06-05 05:49:33,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:33,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 05:49:33,130 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 05:49:33,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:33,130 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 05:49:33,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:33,130 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 05:49:33,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:33,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:33,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:33,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 05:49:33,335 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:33,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:33,336 INFO L82 PathProgramCache]: Analyzing trace with hash 1579224163, now seen corresponding path program 46 times [2021-06-05 05:49:33,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:33,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920783098] [2021-06-05 05:49:33,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:33,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:33,529 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:33,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:33,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920783098] [2021-06-05 05:49:33,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920783098] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:33,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801953807] [2021-06-05 05:49:33,529 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 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 05:49:33,558 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:33,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:33,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:33,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:33,617 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 05:49:33,617 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:33,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:33,624 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 05:49:33,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:33,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:49:33,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:33,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:33,707 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 05:49:33,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:33,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801953807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:33,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:33,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:49:33,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905057407] [2021-06-05 05:49:33,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:49:33,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:33,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:49:33,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=576, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:49:33,817 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 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 05:49:34,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:34,671 INFO L93 Difference]: Finished difference Result 5213 states and 15315 transitions. [2021-06-05 05:49:34,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:49:34,672 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 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 42 [2021-06-05 05:49:34,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:34,677 INFO L225 Difference]: With dead ends: 5213 [2021-06-05 05:49:34,678 INFO L226 Difference]: Without dead ends: 4992 [2021-06-05 05:49:34,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 709.7ms TimeCoverageRelationStatistics Valid=191, Invalid=1701, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:49:34,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4992 states. [2021-06-05 05:49:34,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4992 to 4636. [2021-06-05 05:49:34,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4636 states, 4635 states have (on average 2.993311758360302) internal successors, (13874), 4635 states have internal predecessors, (13874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:34,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4636 states to 4636 states and 13874 transitions. [2021-06-05 05:49:34,728 INFO L78 Accepts]: Start accepts. Automaton has 4636 states and 13874 transitions. Word has length 42 [2021-06-05 05:49:34,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:34,728 INFO L482 AbstractCegarLoop]: Abstraction has 4636 states and 13874 transitions. [2021-06-05 05:49:34,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.9615384615384617) internal successors, (77), 25 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 05:49:34,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4636 states and 13874 transitions. [2021-06-05 05:49:34,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:34,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:34,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:34,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:34,933 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:34,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:34,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1491292073, now seen corresponding path program 47 times [2021-06-05 05:49:34,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:34,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527755556] [2021-06-05 05:49:34,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:34,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:35,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:35,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527755556] [2021-06-05 05:49:35,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527755556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:35,136 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051575313] [2021-06-05 05:49:35,136 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 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 05:49:35,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:49:35,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:35,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:49:35,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:35,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:35,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:35,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:35,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:35,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:35,305 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:35,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:35,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:35,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:35,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:13 [2021-06-05 05:49:35,442 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:35,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051575313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:35,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:35,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 25 [2021-06-05 05:49:35,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394378848] [2021-06-05 05:49:35,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-06-05 05:49:35,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:35,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-06-05 05:49:35,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=572, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:49:35,443 INFO L87 Difference]: Start difference. First operand 4636 states and 13874 transitions. Second operand has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 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 05:49:36,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:36,244 INFO L93 Difference]: Finished difference Result 5470 states and 15956 transitions. [2021-06-05 05:49:36,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:49:36,244 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 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 42 [2021-06-05 05:49:36,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:36,250 INFO L225 Difference]: With dead ends: 5470 [2021-06-05 05:49:36,251 INFO L226 Difference]: Without dead ends: 5249 [2021-06-05 05:49:36,251 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 31 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 645.0ms TimeCoverageRelationStatistics Valid=187, Invalid=1619, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:49:36,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2021-06-05 05:49:36,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 4629. [2021-06-05 05:49:36,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 2.993733794295592) internal successors, (13855), 4628 states have internal predecessors, (13855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:36,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 13855 transitions. [2021-06-05 05:49:36,304 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 13855 transitions. Word has length 42 [2021-06-05 05:49:36,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:36,304 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 13855 transitions. [2021-06-05 05:49:36,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.8846153846153846) internal successors, (75), 25 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 05:49:36,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 13855 transitions. [2021-06-05 05:49:36,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:36,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:36,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:36,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 05:49:36,524 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:36,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:36,525 INFO L82 PathProgramCache]: Analyzing trace with hash 785232515, now seen corresponding path program 48 times [2021-06-05 05:49:36,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:36,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903507146] [2021-06-05 05:49:36,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:36,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:36,751 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:36,751 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:36,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903507146] [2021-06-05 05:49:36,751 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903507146] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:36,751 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953117464] [2021-06-05 05:49:36,751 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 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 05:49:36,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:49:36,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:36,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:36,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:36,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:36,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:36,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:36,866 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 05:49:36,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:36,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:36,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:36,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:36,990 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 05:49:36,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:49:37,122 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:37,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1953117464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:37,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:37,122 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:49:37,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615211694] [2021-06-05 05:49:37,122 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:37,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:37,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:37,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:37,123 INFO L87 Difference]: Start difference. First operand 4629 states and 13855 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:38,347 INFO L93 Difference]: Finished difference Result 5915 states and 17168 transitions. [2021-06-05 05:49:38,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:49:38,347 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:38,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:38,353 INFO L225 Difference]: With dead ends: 5915 [2021-06-05 05:49:38,353 INFO L226 Difference]: Without dead ends: 5694 [2021-06-05 05:49:38,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 902.1ms TimeCoverageRelationStatistics Valid=222, Invalid=1940, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:38,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5694 states. [2021-06-05 05:49:38,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5694 to 4649. [2021-06-05 05:49:38,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.996987951807229) internal successors, (13930), 4648 states have internal predecessors, (13930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:38,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13930 transitions. [2021-06-05 05:49:38,413 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13930 transitions. Word has length 42 [2021-06-05 05:49:38,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:38,413 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13930 transitions. [2021-06-05 05:49:38,413 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:38,413 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13930 transitions. [2021-06-05 05:49:38,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:38,418 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:38,418 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:38,619 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-06-05 05:49:38,619 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:38,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:38,619 INFO L82 PathProgramCache]: Analyzing trace with hash -2019818817, now seen corresponding path program 49 times [2021-06-05 05:49:38,619 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:38,619 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109523961] [2021-06-05 05:49:38,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:38,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:38,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:38,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:38,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109523961] [2021-06-05 05:49:38,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109523961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:38,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657713500] [2021-06-05 05:49:38,862 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 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 05:49:38,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:38,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:38,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:38,969 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:49:38,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:38,977 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:38,978 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 05:49:38,978 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:39,060 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 05:49:39,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:39,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:39,068 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 05:49:39,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:39,221 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:39,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657713500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:39,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:39,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:49:39,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438715135] [2021-06-05 05:49:39,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:39,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:39,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:39,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:39,222 INFO L87 Difference]: Start difference. First operand 4649 states and 13930 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:40,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:40,289 INFO L93 Difference]: Finished difference Result 6319 states and 18331 transitions. [2021-06-05 05:49:40,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:49:40,289 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:40,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:40,296 INFO L225 Difference]: With dead ends: 6319 [2021-06-05 05:49:40,296 INFO L226 Difference]: Without dead ends: 6098 [2021-06-05 05:49:40,297 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 893.6ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:49:40,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6098 states. [2021-06-05 05:49:40,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6098 to 4653. [2021-06-05 05:49:40,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.996775580395529) internal successors, (13941), 4652 states have internal predecessors, (13941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:40,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13941 transitions. [2021-06-05 05:49:40,350 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13941 transitions. Word has length 42 [2021-06-05 05:49:40,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:40,350 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 13941 transitions. [2021-06-05 05:49:40,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:40,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13941 transitions. [2021-06-05 05:49:40,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:40,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:40,354 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:40,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:49:40,555 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:40,555 INFO L82 PathProgramCache]: Analyzing trace with hash -425718621, now seen corresponding path program 50 times [2021-06-05 05:49:40,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:40,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832109688] [2021-06-05 05:49:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:40,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:40,788 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:40,788 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:40,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832109688] [2021-06-05 05:49:40,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832109688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:40,788 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086919461] [2021-06-05 05:49:40,788 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 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 05:49:40,830 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:40,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:40,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:49:40,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:40,971 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:40,972 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:40,979 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:40,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:40,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:41,071 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 05:49:41,072 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:41,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:41,078 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 05:49:41,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:41,238 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:41,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086919461] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:41,238 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:41,238 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:49:41,238 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453780882] [2021-06-05 05:49:41,239 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:41,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:41,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:41,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=626, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:41,239 INFO L87 Difference]: Start difference. First operand 4653 states and 13941 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:42,426 INFO L93 Difference]: Finished difference Result 6961 states and 20115 transitions. [2021-06-05 05:49:42,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:49:42,426 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:42,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:42,434 INFO L225 Difference]: With dead ends: 6961 [2021-06-05 05:49:42,434 INFO L226 Difference]: Without dead ends: 6775 [2021-06-05 05:49:42,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 923.7ms TimeCoverageRelationStatistics Valid=228, Invalid=2124, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:49:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6775 states. [2021-06-05 05:49:42,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6775 to 4637. [2021-06-05 05:49:42,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.9950388265746333) internal successors, (13885), 4636 states have internal predecessors, (13885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:42,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13885 transitions. [2021-06-05 05:49:42,491 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13885 transitions. Word has length 42 [2021-06-05 05:49:42,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:42,491 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13885 transitions. [2021-06-05 05:49:42,491 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:42,491 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13885 transitions. [2021-06-05 05:49:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:42,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:42,495 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:42,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:49:42,696 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:42,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:42,696 INFO L82 PathProgramCache]: Analyzing trace with hash -538817211, now seen corresponding path program 51 times [2021-06-05 05:49:42,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:42,696 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019709715] [2021-06-05 05:49:42,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:42,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:42,891 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:42,891 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:42,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019709715] [2021-06-05 05:49:42,891 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019709715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:42,891 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53552579] [2021-06-05 05:49:42,891 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 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 05:49:42,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:49:42,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:42,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:49:42,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:42,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:49:42,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:42,987 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:42,988 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 05:49:42,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:43,082 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 05:49:43,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:43,088 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:43,088 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 05:49:43,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:43,196 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:43,197 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [53552579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:43,197 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:43,197 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-06-05 05:49:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774804840] [2021-06-05 05:49:43,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-06-05 05:49:43,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:43,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-06-05 05:49:43,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=625, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:49:43,197 INFO L87 Difference]: Start difference. First operand 4637 states and 13885 transitions. Second operand has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:44,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:44,230 INFO L93 Difference]: Finished difference Result 5846 states and 16961 transitions. [2021-06-05 05:49:44,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:49:44,230 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:44,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:44,237 INFO L225 Difference]: With dead ends: 5846 [2021-06-05 05:49:44,237 INFO L226 Difference]: Without dead ends: 5625 [2021-06-05 05:49:44,237 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 787.5ms TimeCoverageRelationStatistics Valid=234, Invalid=2022, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:49:44,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5625 states. [2021-06-05 05:49:44,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5625 to 4627. [2021-06-05 05:49:44,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:44,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-06-05 05:49:44,293 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-06-05 05:49:44,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:44,293 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-06-05 05:49:44,293 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:44,293 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-06-05 05:49:44,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:44,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:44,298 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:44,509 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:44,510 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:44,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:44,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1578142155, now seen corresponding path program 52 times [2021-06-05 05:49:44,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:44,510 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418353963] [2021-06-05 05:49:44,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:44,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:44,717 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:44,717 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:44,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418353963] [2021-06-05 05:49:44,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418353963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:44,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800963330] [2021-06-05 05:49:44,717 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 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 05:49:44,746 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:44,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:44,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:44,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:44,806 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 05:49:44,806 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:44,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:44,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:44,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:44,880 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 05:49:44,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:44,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:44,887 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 05:49:44,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:45,060 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:45,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800963330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:45,060 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:45,060 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:45,060 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565532703] [2021-06-05 05:49:45,060 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:45,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:45,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:45,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:45,061 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:45,947 INFO L93 Difference]: Finished difference Result 5265 states and 15611 transitions. [2021-06-05 05:49:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:49:45,947 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:45,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:45,954 INFO L225 Difference]: With dead ends: 5265 [2021-06-05 05:49:45,954 INFO L226 Difference]: Without dead ends: 5044 [2021-06-05 05:49:45,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 398 ImplicationChecksByTransitivity, 821.1ms TimeCoverageRelationStatistics Valid=193, Invalid=1787, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:49:45,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5044 states. [2021-06-05 05:49:45,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5044 to 4647. [2021-06-05 05:49:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4647 states, 4646 states have (on average 2.992251399052949) internal successors, (13902), 4646 states have internal predecessors, (13902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:46,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4647 states to 4647 states and 13902 transitions. [2021-06-05 05:49:46,009 INFO L78 Accepts]: Start accepts. Automaton has 4647 states and 13902 transitions. Word has length 42 [2021-06-05 05:49:46,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:46,009 INFO L482 AbstractCegarLoop]: Abstraction has 4647 states and 13902 transitions. [2021-06-05 05:49:46,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:46,009 INFO L276 IsEmpty]: Start isEmpty. Operand 4647 states and 13902 transitions. [2021-06-05 05:49:46,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:46,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:46,014 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:46,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-06-05 05:49:46,215 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:46,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:46,215 INFO L82 PathProgramCache]: Analyzing trace with hash 15958041, now seen corresponding path program 53 times [2021-06-05 05:49:46,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:46,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051456035] [2021-06-05 05:49:46,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:46,576 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:46,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:46,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051456035] [2021-06-05 05:49:46,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051456035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:46,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135547185] [2021-06-05 05:49:46,577 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 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 05:49:46,619 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:46,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:46,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:46,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:46,687 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:46,688 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:46,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:46,696 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 05:49:46,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:46,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:46,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:46,776 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:46,777 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 05:49:46,777 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:46,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1135547185] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:46,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:46,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:46,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002585682] [2021-06-05 05:49:46,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:46,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:46,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:46,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:46,939 INFO L87 Difference]: Start difference. First operand 4647 states and 13902 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:47,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:47,839 INFO L93 Difference]: Finished difference Result 5631 states and 16717 transitions. [2021-06-05 05:49:47,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:49:47,839 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:47,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:47,846 INFO L225 Difference]: With dead ends: 5631 [2021-06-05 05:49:47,846 INFO L226 Difference]: Without dead ends: 5445 [2021-06-05 05:49:47,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 932.5ms TimeCoverageRelationStatistics Valid=200, Invalid=1870, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:49:47,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5445 states. [2021-06-05 05:49:47,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5445 to 4643. [2021-06-05 05:49:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.9924601464885825) internal successors, (13891), 4642 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:47,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 13891 transitions. [2021-06-05 05:49:47,900 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 13891 transitions. Word has length 42 [2021-06-05 05:49:47,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:47,900 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 13891 transitions. [2021-06-05 05:49:47,901 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:47,901 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 13891 transitions. [2021-06-05 05:49:47,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:47,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:47,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:48,125 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:48,126 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:48,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:48,126 INFO L82 PathProgramCache]: Analyzing trace with hash 1496115223, now seen corresponding path program 54 times [2021-06-05 05:49:48,126 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:48,126 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950198891] [2021-06-05 05:49:48,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:48,335 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:48,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:48,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950198891] [2021-06-05 05:49:48,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950198891] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:48,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584700215] [2021-06-05 05:49:48,335 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 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 05:49:48,365 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:49:48,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:48,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:49:48,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:48,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:48,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:48,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:48,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:48,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:48,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:49:48,497 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:48,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:48,504 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 05:49:48,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:48,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1584700215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:48,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:48,670 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:48,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100454416] [2021-06-05 05:49:48,670 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:48,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:48,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:48,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=678, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:48,670 INFO L87 Difference]: Start difference. First operand 4643 states and 13891 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:49,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:49,601 INFO L93 Difference]: Finished difference Result 5522 states and 16407 transitions. [2021-06-05 05:49:49,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:49:49,602 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:49,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:49,608 INFO L225 Difference]: With dead ends: 5522 [2021-06-05 05:49:49,608 INFO L226 Difference]: Without dead ends: 5336 [2021-06-05 05:49:49,608 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 394 ImplicationChecksByTransitivity, 805.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:49:49,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-06-05 05:49:49,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4639. [2021-06-05 05:49:49,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.9926692539887885) internal successors, (13880), 4638 states have internal predecessors, (13880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:49,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13880 transitions. [2021-06-05 05:49:49,659 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13880 transitions. Word has length 42 [2021-06-05 05:49:49,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:49,660 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13880 transitions. [2021-06-05 05:49:49,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:49,660 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13880 transitions. [2021-06-05 05:49:49,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:49,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:49,664 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:49,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-06-05 05:49:49,865 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:49,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:49,865 INFO L82 PathProgramCache]: Analyzing trace with hash 152897915, now seen corresponding path program 55 times [2021-06-05 05:49:49,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:49,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523450745] [2021-06-05 05:49:49,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:49,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:50,061 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:50,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:50,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523450745] [2021-06-05 05:49:50,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523450745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:50,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156748212] [2021-06-05 05:49:50,062 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 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 05:49:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:50,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:50,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:50,157 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 05:49:50,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:50,165 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:50,165 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 05:49:50,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:50,293 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 05:49:50,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:50,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:50,299 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 05:49:50,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:50,415 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:50,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156748212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:50,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:50,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:50,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727204835] [2021-06-05 05:49:50,415 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:50,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:50,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:50,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:50,416 INFO L87 Difference]: Start difference. First operand 4639 states and 13880 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:51,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:51,525 INFO L93 Difference]: Finished difference Result 5221 states and 15358 transitions. [2021-06-05 05:49:51,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:49:51,525 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:51,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:51,531 INFO L225 Difference]: With dead ends: 5221 [2021-06-05 05:49:51,531 INFO L226 Difference]: Without dead ends: 5000 [2021-06-05 05:49:51,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 903.6ms TimeCoverageRelationStatistics Valid=225, Invalid=2127, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:49:51,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5000 states. [2021-06-05 05:49:51,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5000 to 4651. [2021-06-05 05:49:51,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 2.9946236559139785) internal successors, (13925), 4650 states have internal predecessors, (13925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:51,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 13925 transitions. [2021-06-05 05:49:51,602 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 13925 transitions. Word has length 42 [2021-06-05 05:49:51,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:51,602 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 13925 transitions. [2021-06-05 05:49:51,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:51,603 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 13925 transitions. [2021-06-05 05:49:51,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:51,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:51,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:51,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:51,808 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:51,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:51,808 INFO L82 PathProgramCache]: Analyzing trace with hash 1642813879, now seen corresponding path program 56 times [2021-06-05 05:49:51,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:51,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066395967] [2021-06-05 05:49:51,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:52,002 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:52,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:52,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066395967] [2021-06-05 05:49:52,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066395967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:52,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742442885] [2021-06-05 05:49:52,002 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 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 05:49:52,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:52,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:52,037 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:52,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:52,094 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:52,095 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:52,101 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:52,101 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 05:49:52,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:52,217 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 05:49:52,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:52,223 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:52,224 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 05:49:52,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:52,373 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:52,373 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742442885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:52,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:52,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:52,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262690555] [2021-06-05 05:49:52,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:52,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:52,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:52,374 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:52,374 INFO L87 Difference]: Start difference. First operand 4651 states and 13925 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:53,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:53,524 INFO L93 Difference]: Finished difference Result 5683 states and 16654 transitions. [2021-06-05 05:49:53,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:49:53,524 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:53,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:53,530 INFO L225 Difference]: With dead ends: 5683 [2021-06-05 05:49:53,531 INFO L226 Difference]: Without dead ends: 5462 [2021-06-05 05:49:53,531 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 915.8ms TimeCoverageRelationStatistics Valid=223, Invalid=2129, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:49:53,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5462 states. [2021-06-05 05:49:53,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5462 to 4655. [2021-06-05 05:49:53,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.994413407821229) internal successors, (13936), 4654 states have internal predecessors, (13936), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:53,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 13936 transitions. [2021-06-05 05:49:53,583 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 13936 transitions. Word has length 42 [2021-06-05 05:49:53,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:53,583 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 13936 transitions. [2021-06-05 05:49:53,583 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:53,583 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 13936 transitions. [2021-06-05 05:49:53,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:53,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:53,588 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:53,788 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-06-05 05:49:53,789 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:53,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:53,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1058053221, now seen corresponding path program 57 times [2021-06-05 05:49:53,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:53,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250424838] [2021-06-05 05:49:53,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:53,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:53,976 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:53,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:53,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250424838] [2021-06-05 05:49:53,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250424838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:53,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232956337] [2021-06-05 05:49:53,977 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 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 05:49:54,009 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:49:54,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:54,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:49:54,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:54,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:54,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:54,076 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:54,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:49:54,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:54,170 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 05:49:54,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:54,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:54,176 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 05:49:54,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:54,337 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:54,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232956337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:54,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:54,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:54,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185311746] [2021-06-05 05:49:54,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:54,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:54,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:54,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:54,344 INFO L87 Difference]: Start difference. First operand 4655 states and 13936 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:55,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:55,749 INFO L93 Difference]: Finished difference Result 6077 states and 17816 transitions. [2021-06-05 05:49:55,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:49:55,749 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:55,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:55,756 INFO L225 Difference]: With dead ends: 6077 [2021-06-05 05:49:55,756 INFO L226 Difference]: Without dead ends: 5891 [2021-06-05 05:49:55,757 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 997.8ms TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:49:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5891 states. [2021-06-05 05:49:55,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5891 to 4627. [2021-06-05 05:49:55,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:55,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-06-05 05:49:55,809 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-06-05 05:49:55,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:55,809 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-06-05 05:49:55,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:55,810 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-06-05 05:49:55,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:55,814 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:55,814 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:56,014 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:49:56,015 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:56,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:56,015 INFO L82 PathProgramCache]: Analyzing trace with hash -793864301, now seen corresponding path program 58 times [2021-06-05 05:49:56,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:56,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994192284] [2021-06-05 05:49:56,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:56,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:56,202 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:56,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:56,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994192284] [2021-06-05 05:49:56,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994192284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:56,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611252221] [2021-06-05 05:49:56,202 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 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 05:49:56,233 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:49:56,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:56,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:56,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:56,291 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 05:49:56,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:56,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:56,298 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 05:49:56,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:49:56,412 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 05:49:56,413 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:56,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:56,418 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 05:49:56,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:49:56,532 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:56,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611252221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:56,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:56,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:56,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653053010] [2021-06-05 05:49:56,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:56,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:56,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:56,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:56,533 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:57,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:57,763 INFO L93 Difference]: Finished difference Result 5890 states and 17085 transitions. [2021-06-05 05:49:57,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:49:57,763 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:57,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:57,770 INFO L225 Difference]: With dead ends: 5890 [2021-06-05 05:49:57,770 INFO L226 Difference]: Without dead ends: 5669 [2021-06-05 05:49:57,771 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 918.4ms TimeCoverageRelationStatistics Valid=262, Invalid=2288, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:49:57,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2021-06-05 05:49:57,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 4639. [2021-06-05 05:49:57,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.995256576110392) internal successors, (13892), 4638 states have internal predecessors, (13892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:57,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 13892 transitions. [2021-06-05 05:49:57,827 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 13892 transitions. Word has length 42 [2021-06-05 05:49:57,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:57,827 INFO L482 AbstractCegarLoop]: Abstraction has 4639 states and 13892 transitions. [2021-06-05 05:49:57,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:57,827 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 13892 transitions. [2021-06-05 05:49:57,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:57,831 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:57,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:49:58,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-06-05 05:49:58,032 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:49:58,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:49:58,033 INFO L82 PathProgramCache]: Analyzing trace with hash 696051663, now seen corresponding path program 59 times [2021-06-05 05:49:58,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:49:58,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040846135] [2021-06-05 05:49:58,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:49:58,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:49:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:49:58,233 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:49:58,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040846135] [2021-06-05 05:49:58,233 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040846135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:58,233 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1967863562] [2021-06-05 05:49:58,233 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 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 05:49:58,264 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:49:58,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:49:58,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:49:58,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:49:58,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:58,323 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:58,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:58,329 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 05:49:58,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:49:58,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:49:58,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:49:58,439 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:49:58,439 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 05:49:58,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:49:58,599 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:49:58,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1967863562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:49:58,600 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:49:58,600 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:49:58,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848018350] [2021-06-05 05:49:58,600 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:49:58,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:49:58,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:49:58,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:49:58,601 INFO L87 Difference]: Start difference. First operand 4639 states and 13892 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:59,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:49:59,930 INFO L93 Difference]: Finished difference Result 6190 states and 17997 transitions. [2021-06-05 05:49:59,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:49:59,931 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:49:59,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:49:59,937 INFO L225 Difference]: With dead ends: 6190 [2021-06-05 05:49:59,937 INFO L226 Difference]: Without dead ends: 5969 [2021-06-05 05:49:59,937 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 969.0ms TimeCoverageRelationStatistics Valid=257, Invalid=2293, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:49:59,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5969 states. [2021-06-05 05:49:59,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5969 to 4643. [2021-06-05 05:49:59,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4643 states, 4642 states have (on average 2.9950452391210685) internal successors, (13903), 4642 states have internal predecessors, (13903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:59,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4643 states to 4643 states and 13903 transitions. [2021-06-05 05:49:59,991 INFO L78 Accepts]: Start accepts. Automaton has 4643 states and 13903 transitions. Word has length 42 [2021-06-05 05:49:59,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:49:59,991 INFO L482 AbstractCegarLoop]: Abstraction has 4643 states and 13903 transitions. [2021-06-05 05:49:59,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:49:59,991 INFO L276 IsEmpty]: Start isEmpty. Operand 4643 states and 13903 transitions. [2021-06-05 05:49:59,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:49:59,995 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:49:59,995 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:00,195 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:00,196 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:00,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:00,196 INFO L82 PathProgramCache]: Analyzing trace with hash -2004815437, now seen corresponding path program 60 times [2021-06-05 05:50:00,196 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:00,196 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290650000] [2021-06-05 05:50:00,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:00,381 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:00,381 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:00,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290650000] [2021-06-05 05:50:00,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290650000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:00,381 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322408031] [2021-06-05 05:50:00,381 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 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 05:50:00,411 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:50:00,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:00,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:50:00,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:00,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:00,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:00,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:00,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:00,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:50:00,564 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 05:50:00,564 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:00,569 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:00,569 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 05:50:00,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:00,704 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:00,704 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [322408031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:00,704 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:00,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:00,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008016842] [2021-06-05 05:50:00,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:00,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:00,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:00,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=677, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:00,705 INFO L87 Difference]: Start difference. First operand 4643 states and 13903 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:02,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:02,068 INFO L93 Difference]: Finished difference Result 6784 states and 19641 transitions. [2021-06-05 05:50:02,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:50:02,068 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:02,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:02,076 INFO L225 Difference]: With dead ends: 6784 [2021-06-05 05:50:02,076 INFO L226 Difference]: Without dead ends: 6598 [2021-06-05 05:50:02,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 650 ImplicationChecksByTransitivity, 1002.8ms TimeCoverageRelationStatistics Valid=276, Invalid=2586, Unknown=0, NotChecked=0, Total=2862 [2021-06-05 05:50:02,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6598 states. [2021-06-05 05:50:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6598 to 4627. [2021-06-05 05:50:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4627 states, 4626 states have (on average 2.993298746217034) internal successors, (13847), 4626 states have internal predecessors, (13847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:02,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4627 states to 4627 states and 13847 transitions. [2021-06-05 05:50:02,153 INFO L78 Accepts]: Start accepts. Automaton has 4627 states and 13847 transitions. Word has length 42 [2021-06-05 05:50:02,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:02,153 INFO L482 AbstractCegarLoop]: Abstraction has 4627 states and 13847 transitions. [2021-06-05 05:50:02,153 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:02,153 INFO L276 IsEmpty]: Start isEmpty. Operand 4627 states and 13847 transitions. [2021-06-05 05:50:02,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:02,158 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:02,158 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:02,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-06-05 05:50:02,358 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:02,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:02,359 INFO L82 PathProgramCache]: Analyzing trace with hash -2117914027, now seen corresponding path program 61 times [2021-06-05 05:50:02,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:02,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369534937] [2021-06-05 05:50:02,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:02,561 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:02,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:02,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369534937] [2021-06-05 05:50:02,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369534937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:02,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261567244] [2021-06-05 05:50:02,561 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 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 05:50:02,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:02,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:02,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:02,667 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 05:50:02,668 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:02,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:02,675 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 05:50:02,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:02,789 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 05:50:02,790 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:02,794 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:02,795 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 05:50:02,795 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:02,912 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:02,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261567244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:02,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:02,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:02,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095568395] [2021-06-05 05:50:02,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:02,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:02,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:02,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:02,913 INFO L87 Difference]: Start difference. First operand 4627 states and 13847 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:03,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:03,975 INFO L93 Difference]: Finished difference Result 5487 states and 16039 transitions. [2021-06-05 05:50:03,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:50:03,976 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:03,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:03,982 INFO L225 Difference]: With dead ends: 5487 [2021-06-05 05:50:03,982 INFO L226 Difference]: Without dead ends: 5266 [2021-06-05 05:50:03,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=247, Invalid=2203, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:50:03,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5266 states. [2021-06-05 05:50:04,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5266 to 4586. [2021-06-05 05:50:04,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.994547437295529) internal successors, (13730), 4585 states have internal predecessors, (13730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:04,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13730 transitions. [2021-06-05 05:50:04,034 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13730 transitions. Word has length 42 [2021-06-05 05:50:04,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:04,034 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13730 transitions. [2021-06-05 05:50:04,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:04,034 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13730 transitions. [2021-06-05 05:50:04,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:04,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:04,040 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:04,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-06-05 05:50:04,257 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:04,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:04,257 INFO L82 PathProgramCache]: Analyzing trace with hash -1514227655, now seen corresponding path program 62 times [2021-06-05 05:50:04,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:04,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716950366] [2021-06-05 05:50:04,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:04,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:04,456 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:04,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:04,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716950366] [2021-06-05 05:50:04,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716950366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:04,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034749363] [2021-06-05 05:50:04,456 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 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 05:50:04,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:04,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:04,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:50:04,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:04,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:50:04,627 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:04,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:04,633 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 05:50:04,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:04,679 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 05:50:04,680 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:04,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:04,685 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 05:50:04,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:04,861 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:04,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034749363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:04,861 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:04,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 05:50:04,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163847983] [2021-06-05 05:50:04,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:50:04,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:04,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:50:04,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:50:04,862 INFO L87 Difference]: Start difference. First operand 4586 states and 13730 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:05,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:05,775 INFO L93 Difference]: Finished difference Result 5807 states and 16947 transitions. [2021-06-05 05:50:05,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:50:05,776 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:05,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:05,783 INFO L225 Difference]: With dead ends: 5807 [2021-06-05 05:50:05,783 INFO L226 Difference]: Without dead ends: 5556 [2021-06-05 05:50:05,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 866.7ms TimeCoverageRelationStatistics Valid=233, Invalid=2119, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:50:05,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5556 states. [2021-06-05 05:50:05,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5556 to 4622. [2021-06-05 05:50:05,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4622 states, 4621 states have (on average 2.9939407054750053) internal successors, (13835), 4621 states have internal predecessors, (13835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:05,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4622 states to 4622 states and 13835 transitions. [2021-06-05 05:50:05,837 INFO L78 Accepts]: Start accepts. Automaton has 4622 states and 13835 transitions. Word has length 42 [2021-06-05 05:50:05,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:05,837 INFO L482 AbstractCegarLoop]: Abstraction has 4622 states and 13835 transitions. [2021-06-05 05:50:05,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:05,838 INFO L276 IsEmpty]: Start isEmpty. Operand 4622 states and 13835 transitions. [2021-06-05 05:50:05,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:05,842 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:05,842 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:06,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-06-05 05:50:06,043 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:06,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:06,043 INFO L82 PathProgramCache]: Analyzing trace with hash 298955211, now seen corresponding path program 63 times [2021-06-05 05:50:06,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:06,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032582688] [2021-06-05 05:50:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:06,230 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:06,230 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:06,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032582688] [2021-06-05 05:50:06,230 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2032582688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:06,230 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777433040] [2021-06-05 05:50:06,230 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 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 05:50:06,262 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:50:06,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:06,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:50:06,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:06,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:06,377 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:06,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:06,383 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 05:50:06,383 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:50:06,449 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 05:50:06,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:06,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:06,455 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 05:50:06,455 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:06,564 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:06,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777433040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:06,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:06,565 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:06,565 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780722469] [2021-06-05 05:50:06,565 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:06,565 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:06,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:06,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:06,565 INFO L87 Difference]: Start difference. First operand 4622 states and 13835 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:07,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:07,629 INFO L93 Difference]: Finished difference Result 6002 states and 17329 transitions. [2021-06-05 05:50:07,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:50:07,629 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:07,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:07,635 INFO L225 Difference]: With dead ends: 6002 [2021-06-05 05:50:07,636 INFO L226 Difference]: Without dead ends: 5781 [2021-06-05 05:50:07,636 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 783.0ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:50:07,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5781 states. [2021-06-05 05:50:07,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5781 to 4625. [2021-06-05 05:50:07,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.9943771626297577) internal successors, (13846), 4624 states have internal predecessors, (13846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:07,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 13846 transitions. [2021-06-05 05:50:07,689 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 13846 transitions. Word has length 42 [2021-06-05 05:50:07,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:07,689 INFO L482 AbstractCegarLoop]: Abstraction has 4625 states and 13846 transitions. [2021-06-05 05:50:07,689 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:07,689 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 13846 transitions. [2021-06-05 05:50:07,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:07,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:07,693 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:07,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:07,894 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:07,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:07,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1368305761, now seen corresponding path program 64 times [2021-06-05 05:50:07,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:07,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206177274] [2021-06-05 05:50:07,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:07,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:08,091 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:08,091 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:08,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206177274] [2021-06-05 05:50:08,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206177274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:08,091 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [593496232] [2021-06-05 05:50:08,092 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 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 05:50:08,123 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:08,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:08,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:08,237 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 05:50:08,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:08,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:08,244 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:08,244 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:08,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:50:08,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:08,313 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:08,313 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 05:50:08,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:08,426 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:08,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [593496232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:08,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:08,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:08,426 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863815315] [2021-06-05 05:50:08,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:08,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:08,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:08,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:08,427 INFO L87 Difference]: Start difference. First operand 4625 states and 13846 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:09,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:09,662 INFO L93 Difference]: Finished difference Result 6284 states and 18100 transitions. [2021-06-05 05:50:09,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:50:09,662 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:09,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:09,669 INFO L225 Difference]: With dead ends: 6284 [2021-06-05 05:50:09,670 INFO L226 Difference]: Without dead ends: 6063 [2021-06-05 05:50:09,670 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 879.3ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:50:09,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6063 states. [2021-06-05 05:50:09,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6063 to 4637. [2021-06-05 05:50:09,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.996333045729077) internal successors, (13891), 4636 states have internal predecessors, (13891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:09,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13891 transitions. [2021-06-05 05:50:09,728 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13891 transitions. Word has length 42 [2021-06-05 05:50:09,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:09,728 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13891 transitions. [2021-06-05 05:50:09,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:09,728 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13891 transitions. [2021-06-05 05:50:09,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:09,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:09,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:09,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:09,933 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:09,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:09,933 INFO L82 PathProgramCache]: Analyzing trace with hash -1436745571, now seen corresponding path program 65 times [2021-06-05 05:50:09,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:09,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949601333] [2021-06-05 05:50:09,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:10,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:10,144 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949601333] [2021-06-05 05:50:10,144 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949601333] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:10,144 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521300160] [2021-06-05 05:50:10,144 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 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 05:50:10,177 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:10,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:10,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:10,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:10,297 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:10,298 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:10,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:10,304 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 05:50:10,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:50:10,350 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 05:50:10,351 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:10,356 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:10,357 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 05:50:10,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:10,527 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:10,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521300160] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:10,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:10,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 29 [2021-06-05 05:50:10,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041043155] [2021-06-05 05:50:10,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-06-05 05:50:10,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:10,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-06-05 05:50:10,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-06-05 05:50:10,528 INFO L87 Difference]: Start difference. First operand 4637 states and 13891 transitions. Second operand has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:11,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:11,822 INFO L93 Difference]: Finished difference Result 6560 states and 18993 transitions. [2021-06-05 05:50:11,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:50:11,823 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:11,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:11,830 INFO L225 Difference]: With dead ends: 6560 [2021-06-05 05:50:11,830 INFO L226 Difference]: Without dead ends: 6339 [2021-06-05 05:50:11,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 995.9ms TimeCoverageRelationStatistics Valid=259, Invalid=2497, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:50:11,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6339 states. [2021-06-05 05:50:11,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6339 to 4641. [2021-06-05 05:50:11,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.9961206896551724) internal successors, (13902), 4640 states have internal predecessors, (13902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:11,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 13902 transitions. [2021-06-05 05:50:11,888 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 13902 transitions. Word has length 42 [2021-06-05 05:50:11,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:11,888 INFO L482 AbstractCegarLoop]: Abstraction has 4641 states and 13902 transitions. [2021-06-05 05:50:11,889 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 2.6) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:11,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 13902 transitions. [2021-06-05 05:50:11,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:11,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:11,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:12,094 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:12,094 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:12,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:12,094 INFO L82 PathProgramCache]: Analyzing trace with hash 157354625, now seen corresponding path program 66 times [2021-06-05 05:50:12,094 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:12,094 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1712427054] [2021-06-05 05:50:12,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:12,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:12,281 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:12,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1712427054] [2021-06-05 05:50:12,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1712427054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:12,281 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730155181] [2021-06-05 05:50:12,281 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 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 05:50:12,310 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:50:12,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:12,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:50:12,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:12,422 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:12,423 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:12,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:12,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:12,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:50:12,473 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 05:50:12,473 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:12,478 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:12,478 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 05:50:12,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:12,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730155181] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:12,656 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:12,656 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:12,657 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134323116] [2021-06-05 05:50:12,657 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:12,657 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:12,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:12,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:12,657 INFO L87 Difference]: Start difference. First operand 4641 states and 13902 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:14,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:14,151 INFO L93 Difference]: Finished difference Result 7255 states and 20991 transitions. [2021-06-05 05:50:14,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:50:14,151 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:14,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:14,160 INFO L225 Difference]: With dead ends: 7255 [2021-06-05 05:50:14,160 INFO L226 Difference]: Without dead ends: 7069 [2021-06-05 05:50:14,161 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 658 ImplicationChecksByTransitivity, 1012.5ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:50:14,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7069 states. [2021-06-05 05:50:14,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7069 to 4610. [2021-06-05 05:50:14,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 2.992189195053157) internal successors, (13791), 4609 states have internal predecessors, (13791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:14,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13791 transitions. [2021-06-05 05:50:14,222 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13791 transitions. Word has length 42 [2021-06-05 05:50:14,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:14,223 INFO L482 AbstractCegarLoop]: Abstraction has 4610 states and 13791 transitions. [2021-06-05 05:50:14,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:14,223 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13791 transitions. [2021-06-05 05:50:14,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:14,227 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:14,227 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:14,427 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-06-05 05:50:14,428 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:14,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:14,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1691017367, now seen corresponding path program 67 times [2021-06-05 05:50:14,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:14,428 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183744405] [2021-06-05 05:50:14,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:14,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:14,623 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:14,623 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:14,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183744405] [2021-06-05 05:50:14,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183744405] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:14,623 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621808550] [2021-06-05 05:50:14,623 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 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 05:50:14,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:14,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:50:14,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:14,759 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:14,760 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 05:50:14,760 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:14,883 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 05:50:14,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:14,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:14,890 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 05:50:14,890 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:15,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:15,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [621808550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:15,016 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:15,016 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:15,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315206550] [2021-06-05 05:50:15,016 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:15,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:15,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:15,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:15,016 INFO L87 Difference]: Start difference. First operand 4610 states and 13791 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:15,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:15,898 INFO L93 Difference]: Finished difference Result 5159 states and 15159 transitions. [2021-06-05 05:50:15,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:50:15,898 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:15,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:15,904 INFO L225 Difference]: With dead ends: 5159 [2021-06-05 05:50:15,904 INFO L226 Difference]: Without dead ends: 4938 [2021-06-05 05:50:15,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 473 ImplicationChecksByTransitivity, 837.4ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:50:15,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4938 states. [2021-06-05 05:50:15,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4938 to 4616. [2021-06-05 05:50:15,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4616 states, 4615 states have (on average 2.9924160346695556) internal successors, (13810), 4615 states have internal predecessors, (13810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:15,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4616 states to 4616 states and 13810 transitions. [2021-06-05 05:50:15,954 INFO L78 Accepts]: Start accepts. Automaton has 4616 states and 13810 transitions. Word has length 42 [2021-06-05 05:50:15,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:15,954 INFO L482 AbstractCegarLoop]: Abstraction has 4616 states and 13810 transitions. [2021-06-05 05:50:15,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:15,955 INFO L276 IsEmpty]: Start isEmpty. Operand 4616 states and 13810 transitions. [2021-06-05 05:50:15,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:15,959 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:15,959 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:16,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:16,160 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:16,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:16,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1534599379, now seen corresponding path program 68 times [2021-06-05 05:50:16,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:16,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903729950] [2021-06-05 05:50:16,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:16,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:16,359 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:16,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:16,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903729950] [2021-06-05 05:50:16,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903729950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:16,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139489103] [2021-06-05 05:50:16,359 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 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 05:50:16,389 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:16,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:16,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:16,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:16,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:16,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:16,481 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:16,481 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 05:50:16,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:50:16,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:16,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:16,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:16,589 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 05:50:16,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:50:16,735 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:16,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139489103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:16,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:16,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:16,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565389884] [2021-06-05 05:50:16,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:16,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:16,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:16,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:16,736 INFO L87 Difference]: Start difference. First operand 4616 states and 13810 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:17,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:17,903 INFO L93 Difference]: Finished difference Result 5523 states and 16069 transitions. [2021-06-05 05:50:17,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:50:17,903 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:17,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:17,909 INFO L225 Difference]: With dead ends: 5523 [2021-06-05 05:50:17,909 INFO L226 Difference]: Without dead ends: 5302 [2021-06-05 05:50:17,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 880.5ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:50:17,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5302 states. [2021-06-05 05:50:17,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5302 to 4628. [2021-06-05 05:50:17,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4628 states, 4627 states have (on average 2.994380808299114) internal successors, (13855), 4627 states have internal predecessors, (13855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:17,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4628 states to 4628 states and 13855 transitions. [2021-06-05 05:50:17,978 INFO L78 Accepts]: Start accepts. Automaton has 4628 states and 13855 transitions. Word has length 42 [2021-06-05 05:50:17,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:17,979 INFO L482 AbstractCegarLoop]: Abstraction has 4628 states and 13855 transitions. [2021-06-05 05:50:17,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:17,979 INFO L276 IsEmpty]: Start isEmpty. Operand 4628 states and 13855 transitions. [2021-06-05 05:50:17,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:17,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:17,983 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:18,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:18,183 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:18,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:18,184 INFO L82 PathProgramCache]: Analyzing trace with hash -44683415, now seen corresponding path program 69 times [2021-06-05 05:50:18,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:18,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497208479] [2021-06-05 05:50:18,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:18,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:18,371 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:18,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:18,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497208479] [2021-06-05 05:50:18,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497208479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:18,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399347970] [2021-06-05 05:50:18,371 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 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 05:50:18,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:50:18,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:18,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:18,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:18,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:18,490 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:18,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:18,498 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 05:50:18,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:50:18,571 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 05:50:18,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:18,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:18,579 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 05:50:18,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:18,718 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:18,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [399347970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:18,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:18,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:18,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689938979] [2021-06-05 05:50:18,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:18,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:18,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:18,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:18,719 INFO L87 Difference]: Start difference. First operand 4628 states and 13855 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:19,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:19,875 INFO L93 Difference]: Finished difference Result 5694 states and 16669 transitions. [2021-06-05 05:50:19,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:50:19,876 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:19,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:19,882 INFO L225 Difference]: With dead ends: 5694 [2021-06-05 05:50:19,882 INFO L226 Difference]: Without dead ends: 5473 [2021-06-05 05:50:19,883 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 885.5ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:50:19,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5473 states. [2021-06-05 05:50:19,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5473 to 4632. [2021-06-05 05:50:19,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4632 states, 4631 states have (on average 2.9941697257611746) internal successors, (13866), 4631 states have internal predecessors, (13866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:19,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4632 states to 4632 states and 13866 transitions. [2021-06-05 05:50:19,934 INFO L78 Accepts]: Start accepts. Automaton has 4632 states and 13866 transitions. Word has length 42 [2021-06-05 05:50:19,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:19,934 INFO L482 AbstractCegarLoop]: Abstraction has 4632 states and 13866 transitions. [2021-06-05 05:50:19,934 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:19,934 INFO L276 IsEmpty]: Start isEmpty. Operand 4632 states and 13866 transitions. [2021-06-05 05:50:19,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:19,938 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:19,938 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:20,139 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:20,139 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:20,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:20,139 INFO L82 PathProgramCache]: Analyzing trace with hash 1549416781, now seen corresponding path program 70 times [2021-06-05 05:50:20,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:20,139 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674071395] [2021-06-05 05:50:20,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:20,347 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:20,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:20,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674071395] [2021-06-05 05:50:20,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674071395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:20,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880137136] [2021-06-05 05:50:20,347 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 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 05:50:20,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:20,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:20,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:20,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:20,467 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 05:50:20,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:20,475 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:20,476 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 05:50:20,476 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:20,546 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 05:50:20,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:20,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:20,552 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 05:50:20,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:20,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [880137136] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:20,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:20,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:20,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468084597] [2021-06-05 05:50:20,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:20,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:20,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:20,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:20,715 INFO L87 Difference]: Start difference. First operand 4632 states and 13866 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:21,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:21,898 INFO L93 Difference]: Finished difference Result 6132 states and 17960 transitions. [2021-06-05 05:50:21,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:50:21,898 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:21,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:21,906 INFO L225 Difference]: With dead ends: 6132 [2021-06-05 05:50:21,906 INFO L226 Difference]: Without dead ends: 5946 [2021-06-05 05:50:21,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 593 ImplicationChecksByTransitivity, 934.8ms TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:50:21,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5946 states. [2021-06-05 05:50:21,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5946 to 4613. [2021-06-05 05:50:21,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.9919774501300953) internal successors, (13799), 4612 states have internal predecessors, (13799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:21,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 13799 transitions. [2021-06-05 05:50:21,960 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 13799 transitions. Word has length 42 [2021-06-05 05:50:21,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:21,960 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 13799 transitions. [2021-06-05 05:50:21,960 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:21,960 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 13799 transitions. [2021-06-05 05:50:21,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:21,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:21,964 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:22,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-06-05 05:50:22,165 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:22,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:22,165 INFO L82 PathProgramCache]: Analyzing trace with hash -111542057, now seen corresponding path program 71 times [2021-06-05 05:50:22,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:22,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20591334] [2021-06-05 05:50:22,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:22,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:22,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20591334] [2021-06-05 05:50:22,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20591334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:22,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537464247] [2021-06-05 05:50:22,355 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 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 05:50:22,385 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:22,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:22,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:22,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:22,487 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 05:50:22,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:22,497 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:22,498 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 05:50:22,498 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:22,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:22,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:22,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:22,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:22,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:50:22,714 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:22,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537464247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:22,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:22,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:22,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108348532] [2021-06-05 05:50:22,715 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:22,715 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:22,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:22,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:22,715 INFO L87 Difference]: Start difference. First operand 4613 states and 13799 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:23,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:23,723 INFO L93 Difference]: Finished difference Result 5251 states and 15563 transitions. [2021-06-05 05:50:23,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:50:23,724 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:23,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:23,732 INFO L225 Difference]: With dead ends: 5251 [2021-06-05 05:50:23,732 INFO L226 Difference]: Without dead ends: 5030 [2021-06-05 05:50:23,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 404 ImplicationChecksByTransitivity, 813.2ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:50:23,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5030 states. [2021-06-05 05:50:23,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5030 to 4633. [2021-06-05 05:50:23,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4633 states, 4632 states have (on average 2.9909326424870466) internal successors, (13854), 4632 states have internal predecessors, (13854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:23,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4633 states to 4633 states and 13854 transitions. [2021-06-05 05:50:23,801 INFO L78 Accepts]: Start accepts. Automaton has 4633 states and 13854 transitions. Word has length 42 [2021-06-05 05:50:23,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:23,801 INFO L482 AbstractCegarLoop]: Abstraction has 4633 states and 13854 transitions. [2021-06-05 05:50:23,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:23,801 INFO L276 IsEmpty]: Start isEmpty. Operand 4633 states and 13854 transitions. [2021-06-05 05:50:23,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:23,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:23,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:24,029 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:24,030 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:24,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:24,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1482558139, now seen corresponding path program 72 times [2021-06-05 05:50:24,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:24,030 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369232508] [2021-06-05 05:50:24,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:24,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:24,254 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:24,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:24,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369232508] [2021-06-05 05:50:24,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369232508] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:24,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66217652] [2021-06-05 05:50:24,254 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 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 05:50:24,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:50:24,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:24,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:50:24,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:24,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:24,389 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:24,397 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:24,398 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:24,398 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 05:50:24,454 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 05:50:24,455 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:24,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:24,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:24,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:24,640 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:24,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66217652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:24,640 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:24,640 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:24,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314520770] [2021-06-05 05:50:24,640 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:24,640 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:24,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:24,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:24,641 INFO L87 Difference]: Start difference. First operand 4633 states and 13854 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:25,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:25,530 INFO L93 Difference]: Finished difference Result 5617 states and 16669 transitions. [2021-06-05 05:50:25,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:50:25,530 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:25,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:25,537 INFO L225 Difference]: With dead ends: 5617 [2021-06-05 05:50:25,537 INFO L226 Difference]: Without dead ends: 5431 [2021-06-05 05:50:25,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 850.4ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:50:25,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5431 states. [2021-06-05 05:50:25,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5431 to 4629. [2021-06-05 05:50:25,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4629 states, 4628 states have (on average 2.99114088159032) internal successors, (13843), 4628 states have internal predecessors, (13843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:25,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4629 states to 4629 states and 13843 transitions. [2021-06-05 05:50:25,591 INFO L78 Accepts]: Start accepts. Automaton has 4629 states and 13843 transitions. Word has length 42 [2021-06-05 05:50:25,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:25,591 INFO L482 AbstractCegarLoop]: Abstraction has 4629 states and 13843 transitions. [2021-06-05 05:50:25,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:25,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4629 states and 13843 transitions. [2021-06-05 05:50:25,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:25,596 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:25,596 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:25,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-06-05 05:50:25,797 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:25,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:25,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1332251975, now seen corresponding path program 73 times [2021-06-05 05:50:25,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:25,797 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194705894] [2021-06-05 05:50:25,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:25,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:26,062 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:26,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:26,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194705894] [2021-06-05 05:50:26,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194705894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:26,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502163864] [2021-06-05 05:50:26,062 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 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 05:50:26,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:26,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:26,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:26,206 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 05:50:26,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:26,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:26,224 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 05:50:26,224 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:26,270 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 05:50:26,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:26,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:26,277 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 05:50:26,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:26,439 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:26,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502163864] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:26,440 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:26,440 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:26,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794001453] [2021-06-05 05:50:26,440 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:26,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:26,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:26,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:26,440 INFO L87 Difference]: Start difference. First operand 4629 states and 13843 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:27,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:27,281 INFO L93 Difference]: Finished difference Result 5508 states and 16359 transitions. [2021-06-05 05:50:27,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:50:27,281 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:27,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:27,287 INFO L225 Difference]: With dead ends: 5508 [2021-06-05 05:50:27,288 INFO L226 Difference]: Without dead ends: 5322 [2021-06-05 05:50:27,288 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 816.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:50:27,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5322 states. [2021-06-05 05:50:27,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5322 to 4625. [2021-06-05 05:50:27,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4625 states, 4624 states have (on average 2.991349480968858) internal successors, (13832), 4624 states have internal predecessors, (13832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:27,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4625 states to 4625 states and 13832 transitions. [2021-06-05 05:50:27,342 INFO L78 Accepts]: Start accepts. Automaton has 4625 states and 13832 transitions. Word has length 42 [2021-06-05 05:50:27,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:27,342 INFO L482 AbstractCegarLoop]: Abstraction has 4625 states and 13832 transitions. [2021-06-05 05:50:27,342 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:27,342 INFO L276 IsEmpty]: Start isEmpty. Operand 4625 states and 13832 transitions. [2021-06-05 05:50:27,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:27,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:27,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:27,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:27,561 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:27,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:27,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1619498013, now seen corresponding path program 74 times [2021-06-05 05:50:27,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:27,561 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1121735286] [2021-06-05 05:50:27,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:27,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:27,746 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:27,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:27,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1121735286] [2021-06-05 05:50:27,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1121735286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:27,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405357152] [2021-06-05 05:50:27,746 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 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 05:50:27,775 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:27,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:27,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:27,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:27,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:27,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:27,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:27,871 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 05:50:27,871 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:50:27,966 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:27,967 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:27,972 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:27,972 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 05:50:27,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:50:28,088 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:28,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405357152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:28,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:28,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:28,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331916878] [2021-06-05 05:50:28,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:28,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:28,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:28,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:28,089 INFO L87 Difference]: Start difference. First operand 4625 states and 13832 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:29,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:29,261 INFO L93 Difference]: Finished difference Result 5207 states and 15310 transitions. [2021-06-05 05:50:29,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:50:29,261 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:29,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:29,267 INFO L225 Difference]: With dead ends: 5207 [2021-06-05 05:50:29,267 INFO L226 Difference]: Without dead ends: 4986 [2021-06-05 05:50:29,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 881.6ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:50:29,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4986 states. [2021-06-05 05:50:29,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4986 to 4637. [2021-06-05 05:50:29,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.993313201035375) internal successors, (13877), 4636 states have internal predecessors, (13877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:29,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13877 transitions. [2021-06-05 05:50:29,319 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13877 transitions. Word has length 42 [2021-06-05 05:50:29,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:29,319 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13877 transitions. [2021-06-05 05:50:29,319 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:29,319 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13877 transitions. [2021-06-05 05:50:29,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:29,323 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:29,324 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:29,524 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:29,524 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:29,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:29,524 INFO L82 PathProgramCache]: Analyzing trace with hash -1185553319, now seen corresponding path program 75 times [2021-06-05 05:50:29,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:29,525 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344888881] [2021-06-05 05:50:29,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:29,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:29,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:29,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:29,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344888881] [2021-06-05 05:50:29,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344888881] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:29,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529329311] [2021-06-05 05:50:29,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:50:29,738 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 05:50:29,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:29,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:29,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:29,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:29,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:29,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:29,829 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 05:50:29,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:50:29,901 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 05:50:29,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:29,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:29,907 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 05:50:29,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:30,047 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:30,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529329311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:30,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:30,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:30,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361820280] [2021-06-05 05:50:30,048 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:30,048 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:30,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:30,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:30,048 INFO L87 Difference]: Start difference. First operand 4637 states and 13877 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:31,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:31,168 INFO L93 Difference]: Finished difference Result 5669 states and 16606 transitions. [2021-06-05 05:50:31,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:50:31,168 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:31,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:31,175 INFO L225 Difference]: With dead ends: 5669 [2021-06-05 05:50:31,175 INFO L226 Difference]: Without dead ends: 5448 [2021-06-05 05:50:31,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 871.9ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:50:31,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2021-06-05 05:50:31,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 4641. [2021-06-05 05:50:31,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4641 states, 4640 states have (on average 2.9931034482758623) internal successors, (13888), 4640 states have internal predecessors, (13888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:31,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4641 states to 4641 states and 13888 transitions. [2021-06-05 05:50:31,228 INFO L78 Accepts]: Start accepts. Automaton has 4641 states and 13888 transitions. Word has length 42 [2021-06-05 05:50:31,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:31,228 INFO L482 AbstractCegarLoop]: Abstraction has 4641 states and 13888 transitions. [2021-06-05 05:50:31,228 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:31,228 INFO L276 IsEmpty]: Start isEmpty. Operand 4641 states and 13888 transitions. [2021-06-05 05:50:31,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:31,233 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:31,233 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:31,434 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:31,434 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:31,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:31,434 INFO L82 PathProgramCache]: Analyzing trace with hash 408546877, now seen corresponding path program 76 times [2021-06-05 05:50:31,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:31,435 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825070398] [2021-06-05 05:50:31,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:31,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:31,653 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:31,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825070398] [2021-06-05 05:50:31,653 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825070398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:31,653 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241082055] [2021-06-05 05:50:31,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:31,682 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:31,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:31,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:31,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:31,773 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 05:50:31,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:31,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:31,781 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 05:50:31,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:31,853 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 05:50:31,854 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:31,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:31,859 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 05:50:31,859 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:32,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241082055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:32,005 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:32,005 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:32,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120526242] [2021-06-05 05:50:32,006 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:32,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:32,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:32,006 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:32,006 INFO L87 Difference]: Start difference. First operand 4641 states and 13888 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:33,281 INFO L93 Difference]: Finished difference Result 6063 states and 17768 transitions. [2021-06-05 05:50:33,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:50:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-06-05 05:50:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:33,289 INFO L225 Difference]: With dead ends: 6063 [2021-06-05 05:50:33,289 INFO L226 Difference]: Without dead ends: 5877 [2021-06-05 05:50:33,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 935.5ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:50:33,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2021-06-05 05:50:33,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 4598. [2021-06-05 05:50:33,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.993038938438112) internal successors, (13759), 4597 states have internal predecessors, (13759), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:33,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 13759 transitions. [2021-06-05 05:50:33,344 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 13759 transitions. Word has length 42 [2021-06-05 05:50:33,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:33,345 INFO L482 AbstractCegarLoop]: Abstraction has 4598 states and 13759 transitions. [2021-06-05 05:50:33,345 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:33,345 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 13759 transitions. [2021-06-05 05:50:33,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:33,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:33,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:33,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:33,550 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:33,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:33,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1267635083, now seen corresponding path program 77 times [2021-06-05 05:50:33,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:33,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839494783] [2021-06-05 05:50:33,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:33,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:33,740 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:33,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839494783] [2021-06-05 05:50:33,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839494783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:33,740 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [590902629] [2021-06-05 05:50:33,740 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:33,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:50:33,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:33,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:50:33,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:33,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:50:33,907 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:33,913 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:33,913 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 05:50:33,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:33,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:33,956 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:33,960 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:33,961 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 05:50:33,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-06-05 05:50:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:34,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [590902629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:34,093 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:34,093 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:34,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406753534] [2021-06-05 05:50:34,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:34,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:34,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:34,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:34,094 INFO L87 Difference]: Start difference. First operand 4598 states and 13759 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:35,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:35,013 INFO L93 Difference]: Finished difference Result 5831 states and 17005 transitions. [2021-06-05 05:50:35,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:50:35,014 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:35,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:35,020 INFO L225 Difference]: With dead ends: 5831 [2021-06-05 05:50:35,020 INFO L226 Difference]: Without dead ends: 5580 [2021-06-05 05:50:35,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 759.3ms TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:50:35,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-06-05 05:50:35,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 4646. [2021-06-05 05:50:35,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4646 states, 4645 states have (on average 2.9909580193756726) internal successors, (13893), 4645 states have internal predecessors, (13893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:35,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4646 states to 4646 states and 13893 transitions. [2021-06-05 05:50:35,074 INFO L78 Accepts]: Start accepts. Automaton has 4646 states and 13893 transitions. Word has length 42 [2021-06-05 05:50:35,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:35,075 INFO L482 AbstractCegarLoop]: Abstraction has 4646 states and 13893 transitions. [2021-06-05 05:50:35,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:35,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4646 states and 13893 transitions. [2021-06-05 05:50:35,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:35,079 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:35,079 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:35,280 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:35,280 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:35,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:35,280 INFO L82 PathProgramCache]: Analyzing trace with hash 545547783, now seen corresponding path program 78 times [2021-06-05 05:50:35,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:35,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371079971] [2021-06-05 05:50:35,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:35,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:35,470 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:35,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:35,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371079971] [2021-06-05 05:50:35,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371079971] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:35,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071178043] [2021-06-05 05:50:35,470 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 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 05:50:35,500 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:50:35,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:35,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:50:35,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:35,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:35,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:35,616 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:35,617 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 05:50:35,617 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:50:35,682 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 05:50:35,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:35,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:35,687 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 05:50:35,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:35,795 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:35,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071178043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:35,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:35,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:35,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423425599] [2021-06-05 05:50:35,796 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:35,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:35,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:35,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:35,796 INFO L87 Difference]: Start difference. First operand 4646 states and 13893 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:36,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:36,695 INFO L93 Difference]: Finished difference Result 6026 states and 17387 transitions. [2021-06-05 05:50:36,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:50:36,696 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:36,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:36,702 INFO L225 Difference]: With dead ends: 6026 [2021-06-05 05:50:36,702 INFO L226 Difference]: Without dead ends: 5805 [2021-06-05 05:50:36,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 791.1ms TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 05:50:36,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5805 states. [2021-06-05 05:50:36,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5805 to 4649. [2021-06-05 05:50:36,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.991394148020654) internal successors, (13904), 4648 states have internal predecessors, (13904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:36,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13904 transitions. [2021-06-05 05:50:36,757 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13904 transitions. Word has length 42 [2021-06-05 05:50:36,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:36,758 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13904 transitions. [2021-06-05 05:50:36,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:36,758 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13904 transitions. [2021-06-05 05:50:36,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:36,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:36,764 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:36,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:36,977 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:36,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:36,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1614898333, now seen corresponding path program 79 times [2021-06-05 05:50:36,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:36,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1008613514] [2021-06-05 05:50:36,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:36,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:37,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:37,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:37,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1008613514] [2021-06-05 05:50:37,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1008613514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:37,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601509520] [2021-06-05 05:50:37,188 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 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 05:50:37,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:37,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:37,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:37,328 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 05:50:37,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:37,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:37,335 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 05:50:37,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:37,398 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 05:50:37,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:37,404 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:37,404 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 05:50:37,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:37,516 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:37,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601509520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:37,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:37,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:37,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967524859] [2021-06-05 05:50:37,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:37,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:37,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:37,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:37,517 INFO L87 Difference]: Start difference. First operand 4649 states and 13904 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:38,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:38,937 INFO L93 Difference]: Finished difference Result 6308 states and 18158 transitions. [2021-06-05 05:50:38,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:50:38,937 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:38,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:38,944 INFO L225 Difference]: With dead ends: 6308 [2021-06-05 05:50:38,944 INFO L226 Difference]: Without dead ends: 6087 [2021-06-05 05:50:38,945 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 958.9ms TimeCoverageRelationStatistics Valid=231, Invalid=2121, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:50:38,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6087 states. [2021-06-05 05:50:38,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6087 to 4661. [2021-06-05 05:50:38,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 2.9933476394849787) internal successors, (13949), 4660 states have internal predecessors, (13949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:39,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 13949 transitions. [2021-06-05 05:50:39,005 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 13949 transitions. Word has length 42 [2021-06-05 05:50:39,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:39,005 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 13949 transitions. [2021-06-05 05:50:39,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:39,005 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 13949 transitions. [2021-06-05 05:50:39,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:39,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:39,009 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:39,210 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:39,210 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:39,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:39,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1190152999, now seen corresponding path program 80 times [2021-06-05 05:50:39,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:39,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093933368] [2021-06-05 05:50:39,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:39,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:39,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:39,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093933368] [2021-06-05 05:50:39,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2093933368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:39,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101948628] [2021-06-05 05:50:39,499 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 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 05:50:39,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:39,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:39,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:39,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:39,654 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 05:50:39,655 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:39,661 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:39,661 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 05:50:39,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:39,703 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 05:50:39,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:39,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:39,708 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 05:50:39,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:39,852 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:39,853 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101948628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:39,853 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:39,853 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:39,853 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427330169] [2021-06-05 05:50:39,853 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:39,853 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:39,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:39,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:39,854 INFO L87 Difference]: Start difference. First operand 4661 states and 13949 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:41,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:41,079 INFO L93 Difference]: Finished difference Result 6584 states and 19051 transitions. [2021-06-05 05:50:41,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:50:41,080 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:41,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:41,087 INFO L225 Difference]: With dead ends: 6584 [2021-06-05 05:50:41,087 INFO L226 Difference]: Without dead ends: 6363 [2021-06-05 05:50:41,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 566 ImplicationChecksByTransitivity, 993.4ms TimeCoverageRelationStatistics Valid=229, Invalid=2123, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:50:41,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6363 states. [2021-06-05 05:50:41,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6363 to 4665. [2021-06-05 05:50:41,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.993138936535163) internal successors, (13960), 4664 states have internal predecessors, (13960), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 13960 transitions. [2021-06-05 05:50:41,145 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 13960 transitions. Word has length 42 [2021-06-05 05:50:41,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:41,145 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 13960 transitions. [2021-06-05 05:50:41,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 13960 transitions. [2021-06-05 05:50:41,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:41,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:41,149 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:41,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-06-05 05:50:41,350 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:41,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:41,350 INFO L82 PathProgramCache]: Analyzing trace with hash 403947197, now seen corresponding path program 81 times [2021-06-05 05:50:41,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:41,350 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944590110] [2021-06-05 05:50:41,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:41,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:41,560 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:41,561 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:41,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944590110] [2021-06-05 05:50:41,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944590110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:41,561 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [411005970] [2021-06-05 05:50:41,561 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 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 05:50:41,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:50:41,593 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:41,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:50:41,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:41,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:41,703 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:41,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:41,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:41,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:50:41,751 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 05:50:41,752 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:41,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:41,757 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 05:50:41,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:41,888 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:41,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [411005970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:41,888 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:41,888 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:41,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943272751] [2021-06-05 05:50:41,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:41,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:41,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:41,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:41,889 INFO L87 Difference]: Start difference. First operand 4665 states and 13960 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:43,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:43,425 INFO L93 Difference]: Finished difference Result 7279 states and 21049 transitions. [2021-06-05 05:50:43,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:50:43,425 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:43,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:43,434 INFO L225 Difference]: With dead ends: 7279 [2021-06-05 05:50:43,434 INFO L226 Difference]: Without dead ends: 7093 [2021-06-05 05:50:43,435 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 659 ImplicationChecksByTransitivity, 952.8ms TimeCoverageRelationStatistics Valid=249, Invalid=2403, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 05:50:43,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7093 states. [2021-06-05 05:50:43,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7093 to 4634. [2021-06-05 05:50:43,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4634 states, 4633 states have (on average 2.989207856680337) internal successors, (13849), 4633 states have internal predecessors, (13849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:43,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4634 states to 4634 states and 13849 transitions. [2021-06-05 05:50:43,500 INFO L78 Accepts]: Start accepts. Automaton has 4634 states and 13849 transitions. Word has length 42 [2021-06-05 05:50:43,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:43,500 INFO L482 AbstractCegarLoop]: Abstraction has 4634 states and 13849 transitions. [2021-06-05 05:50:43,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:43,500 INFO L276 IsEmpty]: Start isEmpty. Operand 4634 states and 13849 transitions. [2021-06-05 05:50:43,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:43,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:43,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:43,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:43,705 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:43,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:43,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1937609939, now seen corresponding path program 82 times [2021-06-05 05:50:43,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:43,706 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059747200] [2021-06-05 05:50:43,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:43,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:43,910 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:43,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:43,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059747200] [2021-06-05 05:50:43,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059747200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:43,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428092801] [2021-06-05 05:50:43,910 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 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 05:50:43,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:43,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:43,939 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:43,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:44,021 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 05:50:44,021 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:44,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:44,029 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 05:50:44,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:44,122 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 05:50:44,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:44,128 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:44,128 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 05:50:44,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:44,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:44,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428092801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:44,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:44,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:44,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870750113] [2021-06-05 05:50:44,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:44,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:44,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:44,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:44,236 INFO L87 Difference]: Start difference. First operand 4634 states and 13849 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:45,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:45,087 INFO L93 Difference]: Finished difference Result 5183 states and 15217 transitions. [2021-06-05 05:50:45,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:50:45,088 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:45,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:45,093 INFO L225 Difference]: With dead ends: 5183 [2021-06-05 05:50:45,093 INFO L226 Difference]: Without dead ends: 4962 [2021-06-05 05:50:45,093 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 762.9ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:50:45,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-06-05 05:50:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 4640. [2021-06-05 05:50:45,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4640 states, 4639 states have (on average 2.989437378745419) internal successors, (13868), 4639 states have internal predecessors, (13868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:45,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4640 states to 4640 states and 13868 transitions. [2021-06-05 05:50:45,142 INFO L78 Accepts]: Start accepts. Automaton has 4640 states and 13868 transitions. Word has length 42 [2021-06-05 05:50:45,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:45,142 INFO L482 AbstractCegarLoop]: Abstraction has 4640 states and 13868 transitions. [2021-06-05 05:50:45,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:45,142 INFO L276 IsEmpty]: Start isEmpty. Operand 4640 states and 13868 transitions. [2021-06-05 05:50:45,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:45,146 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:45,146 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:45,346 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-06-05 05:50:45,347 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:45,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:45,347 INFO L82 PathProgramCache]: Analyzing trace with hash -1288006807, now seen corresponding path program 83 times [2021-06-05 05:50:45,347 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:45,347 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748271471] [2021-06-05 05:50:45,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:45,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:45,551 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:45,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748271471] [2021-06-05 05:50:45,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748271471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:45,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527596144] [2021-06-05 05:50:45,552 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 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 05:50:45,587 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:50:45,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:45,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:50:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:45,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:45,671 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:45,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:45,678 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 05:50:45,679 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:50:45,778 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 05:50:45,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:45,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:45,784 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 05:50:45,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:45,897 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:45,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527596144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:45,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:45,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:45,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416212932] [2021-06-05 05:50:45,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:45,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:45,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:45,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:45,897 INFO L87 Difference]: Start difference. First operand 4640 states and 13868 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:46,946 INFO L93 Difference]: Finished difference Result 5547 states and 16127 transitions. [2021-06-05 05:50:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:50:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:46,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:46,952 INFO L225 Difference]: With dead ends: 5547 [2021-06-05 05:50:46,953 INFO L226 Difference]: Without dead ends: 5326 [2021-06-05 05:50:46,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 537 ImplicationChecksByTransitivity, 877.5ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:50:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5326 states. [2021-06-05 05:50:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5326 to 4652. [2021-06-05 05:50:46,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4652 states, 4651 states have (on average 2.9913996989894645) internal successors, (13913), 4651 states have internal predecessors, (13913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:47,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4652 states to 4652 states and 13913 transitions. [2021-06-05 05:50:47,003 INFO L78 Accepts]: Start accepts. Automaton has 4652 states and 13913 transitions. Word has length 42 [2021-06-05 05:50:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:47,003 INFO L482 AbstractCegarLoop]: Abstraction has 4652 states and 13913 transitions. [2021-06-05 05:50:47,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 4652 states and 13913 transitions. [2021-06-05 05:50:47,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:47,007 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:47,007 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:47,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:47,209 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash 201909157, now seen corresponding path program 84 times [2021-06-05 05:50:47,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:47,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411542495] [2021-06-05 05:50:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:47,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:47,456 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:47,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411542495] [2021-06-05 05:50:47,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411542495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:47,456 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987215021] [2021-06-05 05:50:47,456 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 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 05:50:47,498 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:50:47,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:47,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:50:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:47,590 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:50:47,591 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:47,599 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:47,599 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 05:50:47,600 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:47,678 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 05:50:47,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:47,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:47,684 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 05:50:47,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:47,832 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:47,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987215021] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:47,832 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:47,832 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:47,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297137740] [2021-06-05 05:50:47,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:47,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:47,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:47,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:47,833 INFO L87 Difference]: Start difference. First operand 4652 states and 13913 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:48,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:48,983 INFO L93 Difference]: Finished difference Result 5718 states and 16727 transitions. [2021-06-05 05:50:48,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:50:48,983 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:48,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:48,990 INFO L225 Difference]: With dead ends: 5718 [2021-06-05 05:50:48,990 INFO L226 Difference]: Without dead ends: 5497 [2021-06-05 05:50:48,990 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 536 ImplicationChecksByTransitivity, 948.3ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:50:48,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5497 states. [2021-06-05 05:50:49,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5497 to 4656. [2021-06-05 05:50:49,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4656 states, 4655 states have (on average 2.9911922663802364) internal successors, (13924), 4655 states have internal predecessors, (13924), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4656 states to 4656 states and 13924 transitions. [2021-06-05 05:50:49,043 INFO L78 Accepts]: Start accepts. Automaton has 4656 states and 13924 transitions. Word has length 42 [2021-06-05 05:50:49,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:49,043 INFO L482 AbstractCegarLoop]: Abstraction has 4656 states and 13924 transitions. [2021-06-05 05:50:49,043 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:49,043 INFO L276 IsEmpty]: Start isEmpty. Operand 4656 states and 13924 transitions. [2021-06-05 05:50:49,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:49,047 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:49,047 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:49,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:49,248 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:49,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:49,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1796009353, now seen corresponding path program 85 times [2021-06-05 05:50:49,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:49,248 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763595314] [2021-06-05 05:50:49,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:49,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:49,427 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:49,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:49,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763595314] [2021-06-05 05:50:49,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763595314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:49,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021485157] [2021-06-05 05:50:49,428 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 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 05:50:49,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:49,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:49,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:49,554 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 05:50:49,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:49,562 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:49,562 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 05:50:49,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:49,633 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 05:50:49,633 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:49,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:49,638 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 05:50:49,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:49,775 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:49,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021485157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:49,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:49,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:49,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245658153] [2021-06-05 05:50:49,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:49,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:49,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:49,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:49,776 INFO L87 Difference]: Start difference. First operand 4656 states and 13924 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:51,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:51,005 INFO L93 Difference]: Finished difference Result 6156 states and 18018 transitions. [2021-06-05 05:50:51,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:50:51,006 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:51,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:51,013 INFO L225 Difference]: With dead ends: 6156 [2021-06-05 05:50:51,013 INFO L226 Difference]: Without dead ends: 5970 [2021-06-05 05:50:51,013 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 899.9ms TimeCoverageRelationStatistics Valid=233, Invalid=2217, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:50:51,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5970 states. [2021-06-05 05:50:51,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5970 to 4637. [2021-06-05 05:50:51,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4637 states, 4636 states have (on average 2.98899913718723) internal successors, (13857), 4636 states have internal predecessors, (13857), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4637 states to 4637 states and 13857 transitions. [2021-06-05 05:50:51,068 INFO L78 Accepts]: Start accepts. Automaton has 4637 states and 13857 transitions. Word has length 42 [2021-06-05 05:50:51,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:51,068 INFO L482 AbstractCegarLoop]: Abstraction has 4637 states and 13857 transitions. [2021-06-05 05:50:51,068 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:51,068 INFO L276 IsEmpty]: Start isEmpty. Operand 4637 states and 13857 transitions. [2021-06-05 05:50:51,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:51,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:51,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:51,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:51,273 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:51,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:51,273 INFO L82 PathProgramCache]: Analyzing trace with hash 135050515, now seen corresponding path program 86 times [2021-06-05 05:50:51,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:51,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772611792] [2021-06-05 05:50:51,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:51,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:51,451 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:51,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772611792] [2021-06-05 05:50:51,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772611792] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:51,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214123927] [2021-06-05 05:50:51,451 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 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 05:50:51,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:50:51,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:51,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:51,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:51,562 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 05:50:51,563 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:51,570 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:51,570 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:51,570 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:51,624 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 05:50:51,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:51,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:51,631 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 05:50:51,631 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:51,792 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:51,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1214123927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:51,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:51,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:51,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890497260] [2021-06-05 05:50:51,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:51,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:51,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:51,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:51,793 INFO L87 Difference]: Start difference. First operand 4637 states and 13857 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:52,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:52,641 INFO L93 Difference]: Finished difference Result 5275 states and 15621 transitions. [2021-06-05 05:50:52,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:50:52,641 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:52,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:52,647 INFO L225 Difference]: With dead ends: 5275 [2021-06-05 05:50:52,647 INFO L226 Difference]: Without dead ends: 5054 [2021-06-05 05:50:52,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 784.2ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:50:52,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5054 states. [2021-06-05 05:50:52,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5054 to 4657. [2021-06-05 05:50:52,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 2.9879725085910653) internal successors, (13912), 4656 states have internal predecessors, (13912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:52,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 13912 transitions. [2021-06-05 05:50:52,698 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 13912 transitions. Word has length 42 [2021-06-05 05:50:52,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:52,698 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 13912 transitions. [2021-06-05 05:50:52,698 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:52,698 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 13912 transitions. [2021-06-05 05:50:52,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:52,702 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:52,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:52,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:52,903 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:52,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:52,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1729150711, now seen corresponding path program 87 times [2021-06-05 05:50:52,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:52,903 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302971359] [2021-06-05 05:50:52,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:52,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:53,082 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:53,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302971359] [2021-06-05 05:50:53,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302971359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:53,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893564099] [2021-06-05 05:50:53,082 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 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 05:50:53,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:50:53,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:53,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:50:53,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:53,192 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:53,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:53,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:53,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:50:53,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:19 [2021-06-05 05:50:53,244 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 05:50:53,245 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:53,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:53,251 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 05:50:53,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:53,410 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:53,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893564099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:53,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:53,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:53,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042458758] [2021-06-05 05:50:53,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:53,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:53,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:53,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:53,411 INFO L87 Difference]: Start difference. First operand 4657 states and 13912 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:54,266 INFO L93 Difference]: Finished difference Result 5641 states and 16727 transitions. [2021-06-05 05:50:54,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 05:50:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:54,273 INFO L225 Difference]: With dead ends: 5641 [2021-06-05 05:50:54,273 INFO L226 Difference]: Without dead ends: 5455 [2021-06-05 05:50:54,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 766.2ms TimeCoverageRelationStatistics Valid=200, Invalid=1780, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:50:54,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5455 states. [2021-06-05 05:50:54,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5455 to 4653. [2021-06-05 05:50:54,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 2.988177128116939) internal successors, (13901), 4652 states have internal predecessors, (13901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:54,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 13901 transitions. [2021-06-05 05:50:54,327 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 13901 transitions. Word has length 42 [2021-06-05 05:50:54,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:54,327 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 13901 transitions. [2021-06-05 05:50:54,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:54,327 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 13901 transitions. [2021-06-05 05:50:54,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:54,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:54,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:54,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable94 [2021-06-05 05:50:54,532 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:54,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:54,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1085659403, now seen corresponding path program 88 times [2021-06-05 05:50:54,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:54,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545932463] [2021-06-05 05:50:54,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:54,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:54,713 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:54,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:54,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545932463] [2021-06-05 05:50:54,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545932463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:54,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [934445874] [2021-06-05 05:50:54,713 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 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 05:50:54,743 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:50:54,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:54,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:50:54,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:54,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:50:54,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:54,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:54,834 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 05:50:54,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:54,880 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 05:50:54,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:54,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:54,887 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 05:50:54,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:50:55,079 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:55,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [934445874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:55,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:55,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:55,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147476236] [2021-06-05 05:50:55,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:55,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:55,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:55,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:55,080 INFO L87 Difference]: Start difference. First operand 4653 states and 13901 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:55,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:55,884 INFO L93 Difference]: Finished difference Result 5532 states and 16417 transitions. [2021-06-05 05:50:55,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:50:55,885 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:55,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:55,891 INFO L225 Difference]: With dead ends: 5532 [2021-06-05 05:50:55,891 INFO L226 Difference]: Without dead ends: 5346 [2021-06-05 05:50:55,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 787.8ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:50:55,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5346 states. [2021-06-05 05:50:55,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5346 to 4649. [2021-06-05 05:50:55,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4649 states, 4648 states have (on average 2.988382099827883) internal successors, (13890), 4648 states have internal predecessors, (13890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:55,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4649 states to 4649 states and 13890 transitions. [2021-06-05 05:50:55,944 INFO L78 Accepts]: Start accepts. Automaton has 4649 states and 13890 transitions. Word has length 42 [2021-06-05 05:50:55,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:55,944 INFO L482 AbstractCegarLoop]: Abstraction has 4649 states and 13890 transitions. [2021-06-05 05:50:55,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:55,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4649 states and 13890 transitions. [2021-06-05 05:50:55,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:55,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:55,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:56,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:56,149 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:56,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:56,149 INFO L82 PathProgramCache]: Analyzing trace with hash 1866090585, now seen corresponding path program 89 times [2021-06-05 05:50:56,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:56,149 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293895742] [2021-06-05 05:50:56,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:56,334 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:56,335 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:56,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293895742] [2021-06-05 05:50:56,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293895742] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:56,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013308837] [2021-06-05 05:50:56,335 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 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 05:50:56,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:50:56,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:56,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:50:56,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:56,452 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:50:56,453 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:56,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:56,460 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 05:50:56,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:50:56,554 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 05:50:56,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:56,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:56,562 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 05:50:56,562 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:56,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:56,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013308837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:56,675 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:56,675 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:56,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1632033331] [2021-06-05 05:50:56,675 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:56,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:56,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:56,676 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:56,676 INFO L87 Difference]: Start difference. First operand 4649 states and 13890 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:57,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:57,631 INFO L93 Difference]: Finished difference Result 5231 states and 15368 transitions. [2021-06-05 05:50:57,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:50:57,631 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:57,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:57,636 INFO L225 Difference]: With dead ends: 5231 [2021-06-05 05:50:57,637 INFO L226 Difference]: Without dead ends: 5010 [2021-06-05 05:50:57,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 513 ImplicationChecksByTransitivity, 872.4ms TimeCoverageRelationStatistics Valid=225, Invalid=2031, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:50:57,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5010 states. [2021-06-05 05:50:57,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5010 to 4661. [2021-06-05 05:50:57,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 2.990343347639485) internal successors, (13935), 4660 states have internal predecessors, (13935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:57,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 13935 transitions. [2021-06-05 05:50:57,684 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 13935 transitions. Word has length 42 [2021-06-05 05:50:57,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:57,684 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 13935 transitions. [2021-06-05 05:50:57,685 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 13935 transitions. [2021-06-05 05:50:57,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:57,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:57,689 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:57,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-06-05 05:50:57,889 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:57,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:57,889 INFO L82 PathProgramCache]: Analyzing trace with hash -938960747, now seen corresponding path program 90 times [2021-06-05 05:50:57,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:57,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122414483] [2021-06-05 05:50:57,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:57,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:50:58,069 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:50:58,069 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:50:58,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122414483] [2021-06-05 05:50:58,069 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122414483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:58,069 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424155428] [2021-06-05 05:50:58,069 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:50:58,103 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:50:58,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:50:58,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:50:58,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:50:58,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:50:58,185 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:58,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:58,193 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 05:50:58,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:50:58,264 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 05:50:58,265 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:50:58,269 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:50:58,270 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 05:50:58,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:50:58,404 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:50:58,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424155428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:50:58,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:50:58,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:50:58,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437763288] [2021-06-05 05:50:58,405 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:50:58,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:50:58,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:50:58,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:50:58,405 INFO L87 Difference]: Start difference. First operand 4661 states and 13935 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:59,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:50:59,559 INFO L93 Difference]: Finished difference Result 5693 states and 16664 transitions. [2021-06-05 05:50:59,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:50:59,559 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:50:59,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:50:59,566 INFO L225 Difference]: With dead ends: 5693 [2021-06-05 05:50:59,566 INFO L226 Difference]: Without dead ends: 5472 [2021-06-05 05:50:59,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 863.5ms TimeCoverageRelationStatistics Valid=223, Invalid=2033, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:50:59,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-06-05 05:50:59,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 4665. [2021-06-05 05:50:59,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 2.990137221269297) internal successors, (13946), 4664 states have internal predecessors, (13946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:50:59,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 13946 transitions. [2021-06-05 05:50:59,620 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 13946 transitions. Word has length 42 [2021-06-05 05:50:59,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:50:59,620 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 13946 transitions. [2021-06-05 05:50:59,620 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:50:59,620 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 13946 transitions. [2021-06-05 05:50:59,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:50:59,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:50:59,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:50:59,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:50:59,825 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:50:59,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:50:59,825 INFO L82 PathProgramCache]: Analyzing trace with hash 655139449, now seen corresponding path program 91 times [2021-06-05 05:50:59,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:50:59,826 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799354372] [2021-06-05 05:50:59,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:50:59,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:00,003 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:00,003 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:00,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799354372] [2021-06-05 05:51:00,004 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799354372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:00,004 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079155476] [2021-06-05 05:51:00,004 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 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 05:51:00,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:00,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:00,118 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 05:51:00,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:00,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:00,155 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 05:51:00,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:00,226 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 05:51:00,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:00,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:00,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:00,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-06-05 05:51:00,385 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:00,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079155476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:00,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:00,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:00,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144222126] [2021-06-05 05:51:00,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:00,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:00,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:00,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:00,386 INFO L87 Difference]: Start difference. First operand 4665 states and 13946 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:01,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:01,555 INFO L93 Difference]: Finished difference Result 6087 states and 17826 transitions. [2021-06-05 05:51:01,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:51:01,556 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:01,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:01,562 INFO L225 Difference]: With dead ends: 6087 [2021-06-05 05:51:01,563 INFO L226 Difference]: Without dead ends: 5901 [2021-06-05 05:51:01,563 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 599 ImplicationChecksByTransitivity, 926.2ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:51:01,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5901 states. [2021-06-05 05:51:01,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5901 to 4610. [2021-06-05 05:51:01,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4610 states, 4609 states have (on average 2.99153829464092) internal successors, (13788), 4609 states have internal predecessors, (13788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:01,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4610 states to 4610 states and 13788 transitions. [2021-06-05 05:51:01,616 INFO L78 Accepts]: Start accepts. Automaton has 4610 states and 13788 transitions. Word has length 42 [2021-06-05 05:51:01,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:01,616 INFO L482 AbstractCegarLoop]: Abstraction has 4610 states and 13788 transitions. [2021-06-05 05:51:01,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:01,616 INFO L276 IsEmpty]: Start isEmpty. Operand 4610 states and 13788 transitions. [2021-06-05 05:51:01,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:01,620 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:01,620 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:01,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:01,825 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:01,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:01,825 INFO L82 PathProgramCache]: Analyzing trace with hash -1777111943, now seen corresponding path program 92 times [2021-06-05 05:51:01,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:01,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872041182] [2021-06-05 05:51:01,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:01,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:02,043 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:02,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872041182] [2021-06-05 05:51:02,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872041182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:02,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457069660] [2021-06-05 05:51:02,044 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 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 05:51:02,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:02,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:02,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:02,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:02,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:02,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:02,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:02,209 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 05:51:02,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:51:02,256 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 05:51:02,257 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:02,262 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:02,263 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 05:51:02,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:02,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1457069660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:02,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:02,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:02,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722688040] [2021-06-05 05:51:02,413 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:02,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:02,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:02,413 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:02,413 INFO L87 Difference]: Start difference. First operand 4610 states and 13788 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:03,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:03,365 INFO L93 Difference]: Finished difference Result 5783 states and 16868 transitions. [2021-06-05 05:51:03,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:51:03,366 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:03,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:03,372 INFO L225 Difference]: With dead ends: 5783 [2021-06-05 05:51:03,372 INFO L226 Difference]: Without dead ends: 5532 [2021-06-05 05:51:03,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 821.9ms TimeCoverageRelationStatistics Valid=196, Invalid=1696, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:51:03,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2021-06-05 05:51:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 4598. [2021-06-05 05:51:03,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4598 states, 4597 states have (on average 2.9923863389166847) internal successors, (13756), 4597 states have internal predecessors, (13756), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:03,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4598 states to 4598 states and 13756 transitions. [2021-06-05 05:51:03,429 INFO L78 Accepts]: Start accepts. Automaton has 4598 states and 13756 transitions. Word has length 42 [2021-06-05 05:51:03,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:03,429 INFO L482 AbstractCegarLoop]: Abstraction has 4598 states and 13756 transitions. [2021-06-05 05:51:03,429 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:03,429 INFO L276 IsEmpty]: Start isEmpty. Operand 4598 states and 13756 transitions. [2021-06-05 05:51:03,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:03,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:03,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:03,636 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-06-05 05:51:03,637 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:03,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:03,637 INFO L82 PathProgramCache]: Analyzing trace with hash 36070923, now seen corresponding path program 93 times [2021-06-05 05:51:03,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:03,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369590761] [2021-06-05 05:51:03,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:03,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:03,845 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:03,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:03,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369590761] [2021-06-05 05:51:03,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369590761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:03,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141518831] [2021-06-05 05:51:03,845 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:03,875 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:51:03,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:03,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:51:03,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:03,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:03,979 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:03,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:03,987 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 05:51:03,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:51:04,057 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 05:51:04,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:04,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:04,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:04,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:04,185 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:04,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141518831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:04,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:04,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:04,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261526129] [2021-06-05 05:51:04,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:04,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:04,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:04,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:04,186 INFO L87 Difference]: Start difference. First operand 4598 states and 13756 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:05,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:05,262 INFO L93 Difference]: Finished difference Result 5975 states and 17242 transitions. [2021-06-05 05:51:05,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 05:51:05,262 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:05,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:05,269 INFO L225 Difference]: With dead ends: 5975 [2021-06-05 05:51:05,269 INFO L226 Difference]: Without dead ends: 5754 [2021-06-05 05:51:05,269 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 835.6ms TimeCoverageRelationStatistics Valid=202, Invalid=1778, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:51:05,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5754 states. [2021-06-05 05:51:05,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5754 to 4601. [2021-06-05 05:51:05,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4601 states, 4600 states have (on average 2.9928260869565215) internal successors, (13767), 4600 states have internal predecessors, (13767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:05,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4601 states to 4601 states and 13767 transitions. [2021-06-05 05:51:05,355 INFO L78 Accepts]: Start accepts. Automaton has 4601 states and 13767 transitions. Word has length 42 [2021-06-05 05:51:05,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:05,355 INFO L482 AbstractCegarLoop]: Abstraction has 4601 states and 13767 transitions. [2021-06-05 05:51:05,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:05,355 INFO L276 IsEmpty]: Start isEmpty. Operand 4601 states and 13767 transitions. [2021-06-05 05:51:05,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:05,359 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:05,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:05,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-06-05 05:51:05,560 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:05,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:05,560 INFO L82 PathProgramCache]: Analyzing trace with hash 1105421473, now seen corresponding path program 94 times [2021-06-05 05:51:05,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:05,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805996051] [2021-06-05 05:51:05,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:05,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:05,759 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:05,759 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:05,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805996051] [2021-06-05 05:51:05,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805996051] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:05,759 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541263050] [2021-06-05 05:51:05,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:05,787 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:05,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:05,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:05,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:05,890 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 05:51:05,891 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:05,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:05,898 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 05:51:05,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:05,965 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 05:51:05,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:05,971 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:05,972 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 05:51:05,972 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:06,098 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:06,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541263050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:06,098 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:06,098 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:06,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098304643] [2021-06-05 05:51:06,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:06,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:06,099 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:06,099 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:06,099 INFO L87 Difference]: Start difference. First operand 4601 states and 13767 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:07,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:07,288 INFO L93 Difference]: Finished difference Result 6245 states and 17980 transitions. [2021-06-05 05:51:07,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:51:07,288 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:07,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:07,295 INFO L225 Difference]: With dead ends: 6245 [2021-06-05 05:51:07,295 INFO L226 Difference]: Without dead ends: 6024 [2021-06-05 05:51:07,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 904.1ms TimeCoverageRelationStatistics Valid=224, Invalid=2032, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:51:07,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6024 states. [2021-06-05 05:51:07,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6024 to 4613. [2021-06-05 05:51:07,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4613 states, 4612 states have (on average 2.99479618386817) internal successors, (13812), 4612 states have internal predecessors, (13812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:07,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4613 states to 4613 states and 13812 transitions. [2021-06-05 05:51:07,351 INFO L78 Accepts]: Start accepts. Automaton has 4613 states and 13812 transitions. Word has length 42 [2021-06-05 05:51:07,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:07,352 INFO L482 AbstractCegarLoop]: Abstraction has 4613 states and 13812 transitions. [2021-06-05 05:51:07,352 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:07,352 INFO L276 IsEmpty]: Start isEmpty. Operand 4613 states and 13812 transitions. [2021-06-05 05:51:07,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:07,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:07,356 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:07,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:07,556 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:07,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:07,557 INFO L82 PathProgramCache]: Analyzing trace with hash -1699629859, now seen corresponding path program 95 times [2021-06-05 05:51:07,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:07,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511552683] [2021-06-05 05:51:07,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:07,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:07,740 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:07,741 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:07,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511552683] [2021-06-05 05:51:07,741 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511552683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:07,741 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216188041] [2021-06-05 05:51:07,741 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:07,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:51:07,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:07,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:07,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:07,873 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 05:51:07,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:07,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:07,882 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 05:51:07,882 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:07,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:07,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:07,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:07,933 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 05:51:07,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-06-05 05:51:08,113 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:08,113 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216188041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:08,113 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:08,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:08,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166570214] [2021-06-05 05:51:08,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:08,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:08,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:08,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:08,114 INFO L87 Difference]: Start difference. First operand 4613 states and 13812 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:09,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:09,419 INFO L93 Difference]: Finished difference Result 6513 states and 18851 transitions. [2021-06-05 05:51:09,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 05:51:09,419 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:09,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:09,426 INFO L225 Difference]: With dead ends: 6513 [2021-06-05 05:51:09,426 INFO L226 Difference]: Without dead ends: 6292 [2021-06-05 05:51:09,427 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 942.8ms TimeCoverageRelationStatistics Valid=222, Invalid=2034, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:51:09,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6292 states. [2021-06-05 05:51:09,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6292 to 4617. [2021-06-05 05:51:09,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4617 states, 4616 states have (on average 2.994584055459272) internal successors, (13823), 4616 states have internal predecessors, (13823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:09,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4617 states to 4617 states and 13823 transitions. [2021-06-05 05:51:09,483 INFO L78 Accepts]: Start accepts. Automaton has 4617 states and 13823 transitions. Word has length 42 [2021-06-05 05:51:09,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:09,483 INFO L482 AbstractCegarLoop]: Abstraction has 4617 states and 13823 transitions. [2021-06-05 05:51:09,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:09,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4617 states and 13823 transitions. [2021-06-05 05:51:09,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:09,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:09,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:09,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2021-06-05 05:51:09,688 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:09,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:09,688 INFO L82 PathProgramCache]: Analyzing trace with hash -105529663, now seen corresponding path program 96 times [2021-06-05 05:51:09,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:09,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538774912] [2021-06-05 05:51:09,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:09,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:09,868 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:09,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538774912] [2021-06-05 05:51:09,868 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538774912] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:09,868 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [272529761] [2021-06-05 05:51:09,868 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:09,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:51:09,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:09,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:09,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:09,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:09,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:10,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:10,006 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 05:51:10,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:51:10,050 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 05:51:10,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:10,056 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:10,057 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 05:51:10,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:10,200 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:10,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [272529761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:10,200 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:10,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:10,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952647382] [2021-06-05 05:51:10,201 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:10,201 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:10,201 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:10,201 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:10,201 INFO L87 Difference]: Start difference. First operand 4617 states and 13823 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:11,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:11,630 INFO L93 Difference]: Finished difference Result 7204 states and 20838 transitions. [2021-06-05 05:51:11,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:51:11,631 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:11,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:11,638 INFO L225 Difference]: With dead ends: 7204 [2021-06-05 05:51:11,638 INFO L226 Difference]: Without dead ends: 7018 [2021-06-05 05:51:11,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 977.7ms TimeCoverageRelationStatistics Valid=242, Invalid=2308, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 05:51:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7018 states. [2021-06-05 05:51:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7018 to 4586. [2021-06-05 05:51:11,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.99062159214831) internal successors, (13712), 4585 states have internal predecessors, (13712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:11,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13712 transitions. [2021-06-05 05:51:11,690 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13712 transitions. Word has length 42 [2021-06-05 05:51:11,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:11,690 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13712 transitions. [2021-06-05 05:51:11,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:11,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13712 transitions. [2021-06-05 05:51:11,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:11,694 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:11,694 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:11,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-06-05 05:51:11,895 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:11,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:11,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1428133079, now seen corresponding path program 97 times [2021-06-05 05:51:11,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:11,895 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381912274] [2021-06-05 05:51:11,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:11,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:12,075 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:12,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:12,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381912274] [2021-06-05 05:51:12,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381912274] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:12,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1712419923] [2021-06-05 05:51:12,075 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:12,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:12,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:12,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:12,186 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 05:51:12,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:12,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:12,194 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 05:51:12,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:12,289 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 05:51:12,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:12,299 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:12,299 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 05:51:12,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:12,434 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:12,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1712419923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:12,434 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:12,434 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:12,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783172932] [2021-06-05 05:51:12,434 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:12,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:12,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:12,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=671, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:12,435 INFO L87 Difference]: Start difference. First operand 4586 states and 13712 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:13,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:13,406 INFO L93 Difference]: Finished difference Result 5117 states and 15032 transitions. [2021-06-05 05:51:13,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:51:13,406 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:13,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:13,412 INFO L225 Difference]: With dead ends: 5117 [2021-06-05 05:51:13,412 INFO L226 Difference]: Without dead ends: 4896 [2021-06-05 05:51:13,412 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 779.6ms TimeCoverageRelationStatistics Valid=195, Invalid=1697, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:51:13,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4896 states. [2021-06-05 05:51:13,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4896 to 4574. [2021-06-05 05:51:13,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 2.992127706101028) internal successors, (13683), 4573 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:13,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 13683 transitions. [2021-06-05 05:51:13,463 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 13683 transitions. Word has length 42 [2021-06-05 05:51:13,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:13,463 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 13683 transitions. [2021-06-05 05:51:13,463 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:13,463 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 13683 transitions. [2021-06-05 05:51:13,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:13,468 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:13,468 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:13,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-06-05 05:51:13,673 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:13,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:13,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1797483667, now seen corresponding path program 98 times [2021-06-05 05:51:13,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:13,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568101643] [2021-06-05 05:51:13,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:13,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:13,911 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:13,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:13,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568101643] [2021-06-05 05:51:13,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568101643] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:13,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510199474] [2021-06-05 05:51:13,912 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:13,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:13,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:13,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:13,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:14,050 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 05:51:14,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:14,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:14,059 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 05:51:14,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:14,150 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 05:51:14,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:14,156 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:14,156 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 05:51:14,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:14,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510199474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:14,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:14,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:14,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056291003] [2021-06-05 05:51:14,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:14,279 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:14,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:14,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:14,279 INFO L87 Difference]: Start difference. First operand 4574 states and 13683 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:15,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:15,548 INFO L93 Difference]: Finished difference Result 5469 states and 15909 transitions. [2021-06-05 05:51:15,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:51:15,548 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:15,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:15,554 INFO L225 Difference]: With dead ends: 5469 [2021-06-05 05:51:15,554 INFO L226 Difference]: Without dead ends: 5248 [2021-06-05 05:51:15,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 925.9ms TimeCoverageRelationStatistics Valid=217, Invalid=1945, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:51:15,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5248 states. [2021-06-05 05:51:15,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5248 to 4586. [2021-06-05 05:51:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4586 states, 4585 states have (on average 2.994111232279171) internal successors, (13728), 4585 states have internal predecessors, (13728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:15,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4586 states to 4586 states and 13728 transitions. [2021-06-05 05:51:15,604 INFO L78 Accepts]: Start accepts. Automaton has 4586 states and 13728 transitions. Word has length 42 [2021-06-05 05:51:15,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:15,604 INFO L482 AbstractCegarLoop]: Abstraction has 4586 states and 13728 transitions. [2021-06-05 05:51:15,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:15,604 INFO L276 IsEmpty]: Start isEmpty. Operand 4586 states and 13728 transitions. [2021-06-05 05:51:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:15,608 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:15,608 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:15,812 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:15,813 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:15,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:15,813 INFO L82 PathProgramCache]: Analyzing trace with hash -307567703, now seen corresponding path program 99 times [2021-06-05 05:51:15,813 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:15,813 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2874831] [2021-06-05 05:51:15,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:16,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:16,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2874831] [2021-06-05 05:51:16,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2874831] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:16,016 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808228037] [2021-06-05 05:51:16,016 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:16,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:51:16,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:16,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:16,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:16,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:16,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:16,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:16,134 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 05:51:16,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:51:16,199 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 05:51:16,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:16,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:16,206 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 05:51:16,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:16,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808228037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:16,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:16,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:16,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932282566] [2021-06-05 05:51:16,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:16,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:16,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:16,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:16,350 INFO L87 Difference]: Start difference. First operand 4586 states and 13728 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:17,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:17,392 INFO L93 Difference]: Finished difference Result 5632 states and 16487 transitions. [2021-06-05 05:51:17,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:51:17,392 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:17,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:17,398 INFO L225 Difference]: With dead ends: 5632 [2021-06-05 05:51:17,398 INFO L226 Difference]: Without dead ends: 5411 [2021-06-05 05:51:17,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 511 ImplicationChecksByTransitivity, 892.1ms TimeCoverageRelationStatistics Valid=215, Invalid=1947, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:51:17,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5411 states. [2021-06-05 05:51:17,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5411 to 4590. [2021-06-05 05:51:17,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4590 states, 4589 states have (on average 2.9938984528219654) internal successors, (13739), 4589 states have internal predecessors, (13739), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:17,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4590 states to 4590 states and 13739 transitions. [2021-06-05 05:51:17,449 INFO L78 Accepts]: Start accepts. Automaton has 4590 states and 13739 transitions. Word has length 42 [2021-06-05 05:51:17,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:17,450 INFO L482 AbstractCegarLoop]: Abstraction has 4590 states and 13739 transitions. [2021-06-05 05:51:17,450 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:17,450 INFO L276 IsEmpty]: Start isEmpty. Operand 4590 states and 13739 transitions. [2021-06-05 05:51:17,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:17,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:17,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:17,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 05:51:17,654 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:17,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:17,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1286532493, now seen corresponding path program 100 times [2021-06-05 05:51:17,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:17,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650483500] [2021-06-05 05:51:17,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:17,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:17,834 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:17,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:17,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650483500] [2021-06-05 05:51:17,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650483500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:17,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566177944] [2021-06-05 05:51:17,834 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:17,863 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:17,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:17,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:17,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:17,946 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 05:51:17,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:17,953 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:17,954 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 05:51:17,954 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:18,019 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:51:18,020 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:18,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:18,026 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 05:51:18,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:18,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:18,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566177944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:18,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:18,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:18,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983564279] [2021-06-05 05:51:18,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:18,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:18,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:18,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=672, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:18,172 INFO L87 Difference]: Start difference. First operand 4590 states and 13739 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:19,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:19,587 INFO L93 Difference]: Finished difference Result 6066 states and 17767 transitions. [2021-06-05 05:51:19,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:51:19,587 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:19,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:19,594 INFO L225 Difference]: With dead ends: 6066 [2021-06-05 05:51:19,594 INFO L226 Difference]: Without dead ends: 5880 [2021-06-05 05:51:19,594 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 567 ImplicationChecksByTransitivity, 915.2ms TimeCoverageRelationStatistics Valid=226, Invalid=2126, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:51:19,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5880 states. [2021-06-05 05:51:19,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5880 to 4571. [2021-06-05 05:51:19,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 2.9916849015317286) internal successors, (13672), 4570 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 13672 transitions. [2021-06-05 05:51:19,646 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 13672 transitions. Word has length 42 [2021-06-05 05:51:19,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:19,646 INFO L482 AbstractCegarLoop]: Abstraction has 4571 states and 13672 transitions. [2021-06-05 05:51:19,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 13672 transitions. [2021-06-05 05:51:19,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:19,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:19,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:19,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 05:51:19,851 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:19,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:19,851 INFO L82 PathProgramCache]: Analyzing trace with hash -374426345, now seen corresponding path program 101 times [2021-06-05 05:51:19,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:19,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608790448] [2021-06-05 05:51:19,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:20,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:20,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:20,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608790448] [2021-06-05 05:51:20,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608790448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:20,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353436664] [2021-06-05 05:51:20,030 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:20,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:51:20,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:20,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 05:51:20,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:20,142 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 05:51:20,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:20,150 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:20,150 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 05:51:20,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:20,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:20,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:20,202 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:20,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:20,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:16 [2021-06-05 05:51:20,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:20,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353436664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:20,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:20,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:20,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475950712] [2021-06-05 05:51:20,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:20,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:20,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:20,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:20,379 INFO L87 Difference]: Start difference. First operand 4571 states and 13672 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:21,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:21,249 INFO L93 Difference]: Finished difference Result 5189 states and 15381 transitions. [2021-06-05 05:51:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:51:21,250 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:21,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:21,255 INFO L225 Difference]: With dead ends: 5189 [2021-06-05 05:51:21,255 INFO L226 Difference]: Without dead ends: 4968 [2021-06-05 05:51:21,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 385 ImplicationChecksByTransitivity, 779.3ms TimeCoverageRelationStatistics Valid=186, Invalid=1620, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:51:21,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4968 states. [2021-06-05 05:51:21,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4968 to 4575. [2021-06-05 05:51:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4575 states, 4574 states have (on average 2.991473546130302) internal successors, (13683), 4574 states have internal predecessors, (13683), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:21,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4575 states to 4575 states and 13683 transitions. [2021-06-05 05:51:21,303 INFO L78 Accepts]: Start accepts. Automaton has 4575 states and 13683 transitions. Word has length 42 [2021-06-05 05:51:21,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:21,304 INFO L482 AbstractCegarLoop]: Abstraction has 4575 states and 13683 transitions. [2021-06-05 05:51:21,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:21,304 INFO L276 IsEmpty]: Start isEmpty. Operand 4575 states and 13683 transitions. [2021-06-05 05:51:21,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:21,308 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:21,308 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:21,508 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-06-05 05:51:21,508 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:21,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:21,508 INFO L82 PathProgramCache]: Analyzing trace with hash 1219673851, now seen corresponding path program 102 times [2021-06-05 05:51:21,508 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:21,509 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291034554] [2021-06-05 05:51:21,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:21,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:21,691 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:21,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:21,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291034554] [2021-06-05 05:51:21,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291034554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:21,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292025035] [2021-06-05 05:51:21,691 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:21,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:51:21,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:21,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:51:21,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:21,827 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 05:51:21,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:21,836 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:21,836 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 05:51:21,837 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:21,891 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 05:51:21,892 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:21,898 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:21,899 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 05:51:21,899 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:22,072 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:22,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292025035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:22,072 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:22,072 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:22,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419408248] [2021-06-05 05:51:22,072 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:22,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:22,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:22,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:22,073 INFO L87 Difference]: Start difference. First operand 4575 states and 13683 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:23,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:23,004 INFO L93 Difference]: Finished difference Result 5551 states and 16476 transitions. [2021-06-05 05:51:23,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:51:23,004 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:23,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:23,010 INFO L225 Difference]: With dead ends: 5551 [2021-06-05 05:51:23,011 INFO L226 Difference]: Without dead ends: 5365 [2021-06-05 05:51:23,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 812.4ms TimeCoverageRelationStatistics Valid=193, Invalid=1699, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 05:51:23,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5365 states. [2021-06-05 05:51:23,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5365 to 4571. [2021-06-05 05:51:23,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4571 states, 4570 states have (on average 2.9916849015317286) internal successors, (13672), 4570 states have internal predecessors, (13672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:23,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4571 states to 4571 states and 13672 transitions. [2021-06-05 05:51:23,061 INFO L78 Accepts]: Start accepts. Automaton has 4571 states and 13672 transitions. Word has length 42 [2021-06-05 05:51:23,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:23,061 INFO L482 AbstractCegarLoop]: Abstraction has 4571 states and 13672 transitions. [2021-06-05 05:51:23,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:23,062 INFO L276 IsEmpty]: Start isEmpty. Operand 4571 states and 13672 transitions. [2021-06-05 05:51:23,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:23,066 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:23,066 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:23,266 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:23,266 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:23,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1595136263, now seen corresponding path program 103 times [2021-06-05 05:51:23,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:23,267 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858600735] [2021-06-05 05:51:23,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:23,448 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:23,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:23,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858600735] [2021-06-05 05:51:23,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858600735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:23,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555314134] [2021-06-05 05:51:23,449 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:23,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:23,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:23,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:23,559 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 05:51:23,560 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:23,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:23,567 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 05:51:23,567 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:23,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:51:23,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:23,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:23,620 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 05:51:23,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:23,815 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:23,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555314134] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:23,816 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:23,816 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:23,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362355402] [2021-06-05 05:51:23,816 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:23,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:23,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:23,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:23,816 INFO L87 Difference]: Start difference. First operand 4571 states and 13672 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:24,738 INFO L93 Difference]: Finished difference Result 5442 states and 16166 transitions. [2021-06-05 05:51:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:51:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:24,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:24,745 INFO L225 Difference]: With dead ends: 5442 [2021-06-05 05:51:24,745 INFO L226 Difference]: Without dead ends: 5256 [2021-06-05 05:51:24,745 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 771.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1618, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:51:24,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5256 states. [2021-06-05 05:51:24,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5256 to 4559. [2021-06-05 05:51:24,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4558 states have (on average 2.9923211935059237) internal successors, (13639), 4558 states have internal predecessors, (13639), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:24,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 13639 transitions. [2021-06-05 05:51:24,795 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 13639 transitions. Word has length 42 [2021-06-05 05:51:24,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:24,795 INFO L482 AbstractCegarLoop]: Abstraction has 4559 states and 13639 transitions. [2021-06-05 05:51:24,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:24,795 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 13639 transitions. [2021-06-05 05:51:24,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:24,799 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:24,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:25,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:25,000 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:25,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:25,000 INFO L82 PathProgramCache]: Analyzing trace with hash 1356613725, now seen corresponding path program 104 times [2021-06-05 05:51:25,000 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:25,000 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160397920] [2021-06-05 05:51:25,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:25,190 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:25,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160397920] [2021-06-05 05:51:25,190 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160397920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:25,190 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306850675] [2021-06-05 05:51:25,191 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:25,219 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:25,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:25,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:25,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:25,323 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 05:51:25,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:25,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:25,332 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 05:51:25,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:25,423 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:51:25,424 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:25,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:25,430 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 05:51:25,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:25,556 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:25,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306850675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:25,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:25,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:25,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840548591] [2021-06-05 05:51:25,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:25,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:25,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:25,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:25,557 INFO L87 Difference]: Start difference. First operand 4559 states and 13639 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:26,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:26,653 INFO L93 Difference]: Finished difference Result 5072 states and 14919 transitions. [2021-06-05 05:51:26,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:51:26,653 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:26,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:26,658 INFO L225 Difference]: With dead ends: 5072 [2021-06-05 05:51:26,658 INFO L226 Difference]: Without dead ends: 4851 [2021-06-05 05:51:26,658 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 888.7ms TimeCoverageRelationStatistics Valid=218, Invalid=1944, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:51:26,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4851 states. [2021-06-05 05:51:26,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4851 to 4502. [2021-06-05 05:51:26,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4502 states, 4501 states have (on average 2.9962230615418797) internal successors, (13486), 4501 states have internal predecessors, (13486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4502 states to 4502 states and 13486 transitions. [2021-06-05 05:51:26,705 INFO L78 Accepts]: Start accepts. Automaton has 4502 states and 13486 transitions. Word has length 42 [2021-06-05 05:51:26,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:26,705 INFO L482 AbstractCegarLoop]: Abstraction has 4502 states and 13486 transitions. [2021-06-05 05:51:26,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:26,705 INFO L276 IsEmpty]: Start isEmpty. Operand 4502 states and 13486 transitions. [2021-06-05 05:51:26,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:26,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:26,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:26,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:26,910 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:26,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:26,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1448437607, now seen corresponding path program 105 times [2021-06-05 05:51:26,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:26,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333317179] [2021-06-05 05:51:26,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:26,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:27,099 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:27,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:27,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333317179] [2021-06-05 05:51:27,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1333317179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:27,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055235452] [2021-06-05 05:51:27,100 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:27,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:51:27,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:27,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:27,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:27,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:27,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:27,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:27,217 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 05:51:27,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:30, output treesize:19 [2021-06-05 05:51:27,283 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 05:51:27,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:27,289 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:27,289 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 05:51:27,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:27,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:27,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1055235452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:27,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:27,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:27,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108916579] [2021-06-05 05:51:27,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:27,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:27,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:27,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:27,436 INFO L87 Difference]: Start difference. First operand 4502 states and 13486 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:28,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:28,569 INFO L93 Difference]: Finished difference Result 5470 states and 16035 transitions. [2021-06-05 05:51:28,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 05:51:28,569 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:28,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:28,575 INFO L225 Difference]: With dead ends: 5470 [2021-06-05 05:51:28,575 INFO L226 Difference]: Without dead ends: 5249 [2021-06-05 05:51:28,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 896.0ms TimeCoverageRelationStatistics Valid=216, Invalid=1946, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:51:28,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5249 states. [2021-06-05 05:51:28,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5249 to 4474. [2021-06-05 05:51:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4474 states, 4473 states have (on average 2.9973172367538563) internal successors, (13407), 4473 states have internal predecessors, (13407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:28,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4474 states to 4474 states and 13407 transitions. [2021-06-05 05:51:28,625 INFO L78 Accepts]: Start accepts. Automaton has 4474 states and 13407 transitions. Word has length 42 [2021-06-05 05:51:28,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:28,625 INFO L482 AbstractCegarLoop]: Abstraction has 4474 states and 13407 transitions. [2021-06-05 05:51:28,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:28,625 INFO L276 IsEmpty]: Start isEmpty. Operand 4474 states and 13407 transitions. [2021-06-05 05:51:28,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-06-05 05:51:28,629 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:28,629 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:28,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 05:51:28,830 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:28,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:28,830 INFO L82 PathProgramCache]: Analyzing trace with hash 145662589, now seen corresponding path program 106 times [2021-06-05 05:51:28,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:28,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186938279] [2021-06-05 05:51:28,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:28,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:29,056 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:29,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186938279] [2021-06-05 05:51:29,056 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186938279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:29,056 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747484922] [2021-06-05 05:51:29,056 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:29,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:29,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:29,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 30 conjunts are in the unsatisfiable core [2021-06-05 05:51:29,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:29,166 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 05:51:29,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:29,174 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:29,174 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 05:51:29,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:26, output treesize:19 [2021-06-05 05:51:29,242 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 05:51:29,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:29,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:29,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:29,250 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-06-05 05:51:29,395 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:29,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747484922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:29,396 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:29,396 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 27 [2021-06-05 05:51:29,396 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092643411] [2021-06-05 05:51:29,396 INFO L462 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-06-05 05:51:29,396 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:29,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-06-05 05:51:29,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:51:29,396 INFO L87 Difference]: Start difference. First operand 4474 states and 13407 transitions. Second operand has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:30,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:30,588 INFO L93 Difference]: Finished difference Result 5832 states and 17107 transitions. [2021-06-05 05:51:30,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:51:30,589 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 42 [2021-06-05 05:51:30,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:30,595 INFO L225 Difference]: With dead ends: 5832 [2021-06-05 05:51:30,595 INFO L226 Difference]: Without dead ends: 5646 [2021-06-05 05:51:30,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 1005.6ms TimeCoverageRelationStatistics Valid=235, Invalid=2215, Unknown=0, NotChecked=0, Total=2450 [2021-06-05 05:51:30,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5646 states. [2021-06-05 05:51:30,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5646 to 4343. [2021-06-05 05:51:30,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4343 states, 4342 states have (on average 3.00322432058959) internal successors, (13040), 4342 states have internal predecessors, (13040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:30,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4343 states to 4343 states and 13040 transitions. [2021-06-05 05:51:30,646 INFO L78 Accepts]: Start accepts. Automaton has 4343 states and 13040 transitions. Word has length 42 [2021-06-05 05:51:30,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:30,646 INFO L482 AbstractCegarLoop]: Abstraction has 4343 states and 13040 transitions. [2021-06-05 05:51:30,646 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.607142857142857) internal successors, (73), 27 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 05:51:30,646 INFO L276 IsEmpty]: Start isEmpty. Operand 4343 states and 13040 transitions. [2021-06-05 05:51:30,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:51:30,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:30,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 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, 1, 1] [2021-06-05 05:51:30,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:30,850 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:30,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:30,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1672640872, now seen corresponding path program 107 times [2021-06-05 05:51:30,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:30,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533594037] [2021-06-05 05:51:30,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:30,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:30,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:30,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533594037] [2021-06-05 05:51:30,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533594037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:30,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349268352] [2021-06-05 05:51:30,930 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:30,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:51:30,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:30,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:51:30,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:31,049 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 05:51:31,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:31,050 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:31,051 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 05:51:31,051 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:51:31,063 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 5 treesize of output 3 [2021-06-05 05:51:31,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:31,065 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:31,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:31,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:3 [2021-06-05 05:51:31,079 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:31,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349268352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:31,079 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:31,079 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 05:51:31,079 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [111919485] [2021-06-05 05:51:31,079 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:51:31,079 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:31,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:51:31,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:51:31,080 INFO L87 Difference]: Start difference. First operand 4343 states and 13040 transitions. Second operand has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:31,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:31,406 INFO L93 Difference]: Finished difference Result 10234 states and 30534 transitions. [2021-06-05 05:51:31,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 05:51:31,406 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:51:31,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:31,418 INFO L225 Difference]: With dead ends: 10234 [2021-06-05 05:51:31,418 INFO L226 Difference]: Without dead ends: 10160 [2021-06-05 05:51:31,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 219.3ms TimeCoverageRelationStatistics Valid=158, Invalid=544, Unknown=0, NotChecked=0, Total=702 [2021-06-05 05:51:31,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10160 states. [2021-06-05 05:51:31,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10160 to 7919. [2021-06-05 05:51:31,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7919 states, 7918 states have (on average 2.9993685274059105) internal successors, (23749), 7918 states have internal predecessors, (23749), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:31,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7919 states to 7919 states and 23749 transitions. [2021-06-05 05:51:31,537 INFO L78 Accepts]: Start accepts. Automaton has 7919 states and 23749 transitions. Word has length 45 [2021-06-05 05:51:31,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:31,537 INFO L482 AbstractCegarLoop]: Abstraction has 7919 states and 23749 transitions. [2021-06-05 05:51:31,537 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.714285714285714) internal successors, (80), 13 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:31,538 INFO L276 IsEmpty]: Start isEmpty. Operand 7919 states and 23749 transitions. [2021-06-05 05:51:31,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-06-05 05:51:31,545 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:31,545 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 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, 1, 1] [2021-06-05 05:51:31,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-06-05 05:51:31,749 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:31,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:31,749 INFO L82 PathProgramCache]: Analyzing trace with hash 720881366, now seen corresponding path program 108 times [2021-06-05 05:51:31,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:31,749 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432775836] [2021-06-05 05:51:31,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:31,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:31,791 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:31,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:31,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432775836] [2021-06-05 05:51:31,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432775836] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:31,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193107047] [2021-06-05 05:51:31,792 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:31,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:51:31,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:31,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:51:31,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:31,899 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:51:31,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193107047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:31,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:31,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:51:31,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202796574] [2021-06-05 05:51:31,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:51:31,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:31,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:51:31,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:51:31,900 INFO L87 Difference]: Start difference. First operand 7919 states and 23749 transitions. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 05:51:31,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:31,943 INFO L93 Difference]: Finished difference Result 14786 states and 44002 transitions. [2021-06-05 05:51:31,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:51:31,943 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 46 [2021-06-05 05:51:31,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:31,961 INFO L225 Difference]: With dead ends: 14786 [2021-06-05 05:51:31,961 INFO L226 Difference]: Without dead ends: 14467 [2021-06-05 05:51:31,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 23.4ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:51:31,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14467 states. [2021-06-05 05:51:32,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14467 to 10469. [2021-06-05 05:51:32,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10469 states, 10468 states have (on average 3.0246465418418036) internal successors, (31662), 10468 states have internal predecessors, (31662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10469 states to 10469 states and 31662 transitions. [2021-06-05 05:51:32,107 INFO L78 Accepts]: Start accepts. Automaton has 10469 states and 31662 transitions. Word has length 46 [2021-06-05 05:51:32,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:32,107 INFO L482 AbstractCegarLoop]: Abstraction has 10469 states and 31662 transitions. [2021-06-05 05:51:32,107 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 5 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 05:51:32,107 INFO L276 IsEmpty]: Start isEmpty. Operand 10469 states and 31662 transitions. [2021-06-05 05:51:32,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 05:51:32,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:32,117 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1] [2021-06-05 05:51:32,317 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:32,318 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1385132176, now seen corresponding path program 109 times [2021-06-05 05:51:32,318 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:32,318 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1464825156] [2021-06-05 05:51:32,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:32,395 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:51:32,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1464825156] [2021-06-05 05:51:32,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1464825156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:32,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723248107] [2021-06-05 05:51:32,396 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:32,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:32,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 05:51:32,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:32,523 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:32,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:32,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:32,527 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 05:51:32,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:18, output treesize:7 [2021-06-05 05:51:32,553 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 05:51:32,554 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:32,555 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:32,555 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 05:51:32,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:51:32,588 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:32,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [723248107] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:32,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:32,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 17 [2021-06-05 05:51:32,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101295695] [2021-06-05 05:51:32,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:51:32,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:32,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:51:32,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=265, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:51:32,589 INFO L87 Difference]: Start difference. First operand 10469 states and 31662 transitions. Second operand has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:33,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:33,746 INFO L93 Difference]: Finished difference Result 23559 states and 70272 transitions. [2021-06-05 05:51:33,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:51:33,746 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 05:51:33,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:33,775 INFO L225 Difference]: With dead ends: 23559 [2021-06-05 05:51:33,775 INFO L226 Difference]: Without dead ends: 23343 [2021-06-05 05:51:33,775 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1526 ImplicationChecksByTransitivity, 632.6ms TimeCoverageRelationStatistics Valid=524, Invalid=4306, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:51:33,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23343 states. [2021-06-05 05:51:33,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23343 to 15335. [2021-06-05 05:51:33,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15335 states, 15334 states have (on average 3.039259162645102) internal successors, (46604), 15334 states have internal predecessors, (46604), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:34,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15335 states to 15335 states and 46604 transitions. [2021-06-05 05:51:34,011 INFO L78 Accepts]: Start accepts. Automaton has 15335 states and 46604 transitions. Word has length 50 [2021-06-05 05:51:34,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:34,011 INFO L482 AbstractCegarLoop]: Abstraction has 15335 states and 46604 transitions. [2021-06-05 05:51:34,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.555555555555555) internal successors, (82), 17 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:34,011 INFO L276 IsEmpty]: Start isEmpty. Operand 15335 states and 46604 transitions. [2021-06-05 05:51:34,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 05:51:34,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:34,028 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1] [2021-06-05 05:51:34,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:34,229 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:34,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:34,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1131355344, now seen corresponding path program 110 times [2021-06-05 05:51:34,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:34,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [939101221] [2021-06-05 05:51:34,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:34,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:34,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [939101221] [2021-06-05 05:51:34,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [939101221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:34,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127625297] [2021-06-05 05:51:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:34,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:34,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:34,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 05:51:34,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:34,471 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:34,472 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:34,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:34,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:34,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:9 [2021-06-05 05:51:34,521 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 05:51:34,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:34,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:34,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:34,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:51:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 12 proven. 14 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:34,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127625297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:34,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:34,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 20 [2021-06-05 05:51:34,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302649923] [2021-06-05 05:51:34,549 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:51:34,549 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:34,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:51:34,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=367, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:51:34,549 INFO L87 Difference]: Start difference. First operand 15335 states and 46604 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:35,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:35,389 INFO L93 Difference]: Finished difference Result 32072 states and 96588 transitions. [2021-06-05 05:51:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 05:51:35,401 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 05:51:35,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:35,454 INFO L225 Difference]: With dead ends: 32072 [2021-06-05 05:51:35,454 INFO L226 Difference]: Without dead ends: 32072 [2021-06-05 05:51:35,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 396.3ms TimeCoverageRelationStatistics Valid=183, Invalid=1299, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:51:35,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32072 states. [2021-06-05 05:51:35,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32072 to 18125. [2021-06-05 05:51:35,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18125 states, 18124 states have (on average 3.0475612447583313) internal successors, (55234), 18124 states have internal predecessors, (55234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18125 states to 18125 states and 55234 transitions. [2021-06-05 05:51:35,827 INFO L78 Accepts]: Start accepts. Automaton has 18125 states and 55234 transitions. Word has length 50 [2021-06-05 05:51:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:35,827 INFO L482 AbstractCegarLoop]: Abstraction has 18125 states and 55234 transitions. [2021-06-05 05:51:35,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 18125 states and 55234 transitions. [2021-06-05 05:51:35,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 05:51:35,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:35,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1] [2021-06-05 05:51:36,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:36,048 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:36,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:36,048 INFO L82 PathProgramCache]: Analyzing trace with hash -2029396504, now seen corresponding path program 111 times [2021-06-05 05:51:36,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:36,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [44616268] [2021-06-05 05:51:36,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:36,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:36,117 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:51:36,117 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:36,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [44616268] [2021-06-05 05:51:36,118 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [44616268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:36,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [771559341] [2021-06-05 05:51:36,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:36,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:51:36,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:36,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:51:36,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:36,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2021-06-05 05:51:36,205 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:36,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:36,206 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 05:51:36,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:9, output treesize:3 [2021-06-05 05:51:36,212 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 05:51:36,212 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:36,213 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:36,214 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 05:51:36,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:51:36,260 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 18 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:36,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [771559341] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:36,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:36,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 12 [2021-06-05 05:51:36,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141645729] [2021-06-05 05:51:36,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:51:36,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:36,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:51:36,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:51:36,261 INFO L87 Difference]: Start difference. First operand 18125 states and 55234 transitions. Second operand has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:37,145 INFO L93 Difference]: Finished difference Result 46630 states and 139823 transitions. [2021-06-05 05:51:37,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:51:37,146 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 05:51:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:37,212 INFO L225 Difference]: With dead ends: 46630 [2021-06-05 05:51:37,213 INFO L226 Difference]: Without dead ends: 46558 [2021-06-05 05:51:37,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 533 ImplicationChecksByTransitivity, 554.5ms TimeCoverageRelationStatistics Valid=428, Invalid=1734, Unknown=0, NotChecked=0, Total=2162 [2021-06-05 05:51:37,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46558 states. [2021-06-05 05:51:37,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46558 to 18168. [2021-06-05 05:51:37,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18168 states, 18167 states have (on average 3.048329388451588) internal successors, (55379), 18167 states have internal predecessors, (55379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18168 states to 18168 states and 55379 transitions. [2021-06-05 05:51:37,851 INFO L78 Accepts]: Start accepts. Automaton has 18168 states and 55379 transitions. Word has length 50 [2021-06-05 05:51:37,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:37,851 INFO L482 AbstractCegarLoop]: Abstraction has 18168 states and 55379 transitions. [2021-06-05 05:51:37,851 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 5.153846153846154) internal successors, (67), 12 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:37,851 INFO L276 IsEmpty]: Start isEmpty. Operand 18168 states and 55379 transitions. [2021-06-05 05:51:37,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 05:51:37,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:37,870 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1] [2021-06-05 05:51:38,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-06-05 05:51:38,070 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:38,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:38,071 INFO L82 PathProgramCache]: Analyzing trace with hash 557888300, now seen corresponding path program 112 times [2021-06-05 05:51:38,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:38,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680550775] [2021-06-05 05:51:38,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:38,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:38,198 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 10 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:51:38,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:38,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680550775] [2021-06-05 05:51:38,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [680550775] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:38,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078158888] [2021-06-05 05:51:38,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:38,229 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:38,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:38,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 28 conjunts are in the unsatisfiable core [2021-06-05 05:51:38,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:38,347 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:38,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:38,351 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:38,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:51:38,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:7 [2021-06-05 05:51:38,383 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 05:51:38,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:38,386 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:38,386 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 05:51:38,386 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:51:38,418 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:38,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078158888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:38,418 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:38,418 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 16 [2021-06-05 05:51:38,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085096942] [2021-06-05 05:51:38,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:51:38,419 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:38,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:51:38,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=233, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:51:38,419 INFO L87 Difference]: Start difference. First operand 18168 states and 55379 transitions. Second operand has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:39,828 INFO L93 Difference]: Finished difference Result 42820 states and 128095 transitions. [2021-06-05 05:51:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:51:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 05:51:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:39,885 INFO L225 Difference]: With dead ends: 42820 [2021-06-05 05:51:39,885 INFO L226 Difference]: Without dead ends: 42820 [2021-06-05 05:51:39,886 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 710.1ms TimeCoverageRelationStatistics Valid=680, Invalid=4012, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:51:39,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42820 states. [2021-06-05 05:51:40,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42820 to 18704. [2021-06-05 05:51:40,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18704 states, 18703 states have (on average 3.0469978078383146) internal successors, (56988), 18703 states have internal predecessors, (56988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:40,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18704 states to 18704 states and 56988 transitions. [2021-06-05 05:51:40,393 INFO L78 Accepts]: Start accepts. Automaton has 18704 states and 56988 transitions. Word has length 50 [2021-06-05 05:51:40,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:40,393 INFO L482 AbstractCegarLoop]: Abstraction has 18704 states and 56988 transitions. [2021-06-05 05:51:40,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.882352941176471) internal successors, (83), 16 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:40,393 INFO L276 IsEmpty]: Start isEmpty. Operand 18704 states and 56988 transitions. [2021-06-05 05:51:40,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 05:51:40,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:40,412 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1] [2021-06-05 05:51:40,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 05:51:40,612 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:40,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:40,613 INFO L82 PathProgramCache]: Analyzing trace with hash 298217094, now seen corresponding path program 113 times [2021-06-05 05:51:40,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:40,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454583826] [2021-06-05 05:51:40,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:40,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:40,676 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:40,677 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:40,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454583826] [2021-06-05 05:51:40,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454583826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:40,677 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711050790] [2021-06-05 05:51:40,677 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:40,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:51:40,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:40,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 16 conjunts are in the unsatisfiable core [2021-06-05 05:51:40,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:40,774 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 5 treesize of output 3 [2021-06-05 05:51:40,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:40,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:40,780 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 05:51:40,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:16, output treesize:11 [2021-06-05 05:51:40,808 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 05:51:40,809 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:40,811 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:40,811 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 05:51:40,811 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:51:40,862 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:40,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [711050790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:40,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:40,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-06-05 05:51:40,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115014393] [2021-06-05 05:51:40,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:51:40,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:40,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:51:40,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=89, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:51:40,863 INFO L87 Difference]: Start difference. First operand 18704 states and 56988 transitions. Second operand has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:41,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:41,651 INFO L93 Difference]: Finished difference Result 36696 states and 110045 transitions. [2021-06-05 05:51:41,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 05:51:41,651 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 05:51:41,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:41,786 INFO L225 Difference]: With dead ends: 36696 [2021-06-05 05:51:41,787 INFO L226 Difference]: Without dead ends: 36480 [2021-06-05 05:51:41,787 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 46 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 420.5ms TimeCoverageRelationStatistics Valid=243, Invalid=1163, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:51:41,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36480 states. [2021-06-05 05:51:42,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36480 to 20510. [2021-06-05 05:51:42,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20510 states, 20509 states have (on average 3.056024184504364) internal successors, (62676), 20509 states have internal predecessors, (62676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:42,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20510 states to 20510 states and 62676 transitions. [2021-06-05 05:51:42,218 INFO L78 Accepts]: Start accepts. Automaton has 20510 states and 62676 transitions. Word has length 50 [2021-06-05 05:51:42,218 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:42,218 INFO L482 AbstractCegarLoop]: Abstraction has 20510 states and 62676 transitions. [2021-06-05 05:51:42,218 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.636363636363637) internal successors, (51), 10 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:42,218 INFO L276 IsEmpty]: Start isEmpty. Operand 20510 states and 62676 transitions. [2021-06-05 05:51:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 05:51:42,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:42,240 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1] [2021-06-05 05:51:42,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2021-06-05 05:51:42,441 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:42,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:42,442 INFO L82 PathProgramCache]: Analyzing trace with hash -603741626, now seen corresponding path program 114 times [2021-06-05 05:51:42,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:42,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2136029650] [2021-06-05 05:51:42,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:42,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:42,513 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:42,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:42,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2136029650] [2021-06-05 05:51:42,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2136029650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:42,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490362432] [2021-06-05 05:51:42,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:42,547 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:51:42,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:42,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 14 conjunts are in the unsatisfiable core [2021-06-05 05:51:42,548 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:42,609 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 05:51:42,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:42,611 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:42,612 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 05:51:42,612 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:51:42,663 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:42,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490362432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:42,663 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:42,663 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-06-05 05:51:42,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868211332] [2021-06-05 05:51:42,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:51:42,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:42,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:51:42,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:51:42,664 INFO L87 Difference]: Start difference. First operand 20510 states and 62676 transitions. Second operand has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 05:51:44,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:44,113 INFO L93 Difference]: Finished difference Result 56439 states and 168853 transitions. [2021-06-05 05:51:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:51:44,113 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 50 [2021-06-05 05:51:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:44,208 INFO L225 Difference]: With dead ends: 56439 [2021-06-05 05:51:44,209 INFO L226 Difference]: Without dead ends: 56367 [2021-06-05 05:51:44,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1419 ImplicationChecksByTransitivity, 877.5ms TimeCoverageRelationStatistics Valid=603, Invalid=3819, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:51:44,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56367 states. [2021-06-05 05:51:44,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56367 to 20553. [2021-06-05 05:51:44,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20553 states, 20552 states have (on average 3.0566854807318022) internal successors, (62821), 20552 states have internal predecessors, (62821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:44,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20553 states to 20553 states and 62821 transitions. [2021-06-05 05:51:44,841 INFO L78 Accepts]: Start accepts. Automaton has 20553 states and 62821 transitions. Word has length 50 [2021-06-05 05:51:44,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:44,841 INFO L482 AbstractCegarLoop]: Abstraction has 20553 states and 62821 transitions. [2021-06-05 05:51:44,842 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.416666666666667) internal successors, (53), 11 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 05:51:44,842 INFO L276 IsEmpty]: Start isEmpty. Operand 20553 states and 62821 transitions. [2021-06-05 05:51:44,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-06-05 05:51:44,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:44,862 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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, 1, 1] [2021-06-05 05:51:45,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2021-06-05 05:51:45,064 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:45,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:45,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1983543178, now seen corresponding path program 115 times [2021-06-05 05:51:45,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:45,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764472724] [2021-06-05 05:51:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:45,122 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:51:45,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764472724] [2021-06-05 05:51:45,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764472724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:45,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69930157] [2021-06-05 05:51:45,123 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:45,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:45,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 05:51:45,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:45,235 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 05:51:45,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:45,238 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:45,239 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 05:51:45,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:9 [2021-06-05 05:51:45,279 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 05:51:45,280 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:45,281 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:45,281 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 05:51:45,282 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-06-05 05:51:45,306 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 11 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:45,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69930157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:45,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:45,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 05:51:45,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152539149] [2021-06-05 05:51:45,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:51:45,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:45,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:51:45,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=266, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:51:45,307 INFO L87 Difference]: Start difference. First operand 20553 states and 62821 transitions. Second operand has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:46,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:46,515 INFO L93 Difference]: Finished difference Result 37544 states and 112111 transitions. [2021-06-05 05:51:46,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:51:46,515 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-06-05 05:51:46,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:46,570 INFO L225 Difference]: With dead ends: 37544 [2021-06-05 05:51:46,571 INFO L226 Difference]: Without dead ends: 37544 [2021-06-05 05:51:46,571 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 517.8ms TimeCoverageRelationStatistics Valid=367, Invalid=2825, Unknown=0, NotChecked=0, Total=3192 [2021-06-05 05:51:46,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37544 states. [2021-06-05 05:51:47,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37544 to 19929. [2021-06-05 05:51:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19929 states, 19928 states have (on average 3.0583099156965075) internal successors, (60946), 19928 states have internal predecessors, (60946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19929 states to 19929 states and 60946 transitions. [2021-06-05 05:51:47,105 INFO L78 Accepts]: Start accepts. Automaton has 19929 states and 60946 transitions. Word has length 50 [2021-06-05 05:51:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:47,105 INFO L482 AbstractCegarLoop]: Abstraction has 19929 states and 60946 transitions. [2021-06-05 05:51:47,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.833333333333333) internal successors, (87), 17 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,106 INFO L276 IsEmpty]: Start isEmpty. Operand 19929 states and 60946 transitions. [2021-06-05 05:51:47,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-06-05 05:51:47,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:47,130 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1, 1, 1] [2021-06-05 05:51:47,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:47,345 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:47,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:47,345 INFO L82 PathProgramCache]: Analyzing trace with hash -522037444, now seen corresponding path program 116 times [2021-06-05 05:51:47,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:47,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200530433] [2021-06-05 05:51:47,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:47,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:47,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:47,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200530433] [2021-06-05 05:51:47,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200530433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:47,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564049191] [2021-06-05 05:51:47,366 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:47,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:51:47,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:47,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:51:47,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:47,450 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 33 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:47,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1564049191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:47,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:47,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-06-05 05:51:47,451 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070978305] [2021-06-05 05:51:47,451 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:51:47,451 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:47,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:51:47,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:51:47,451 INFO L87 Difference]: Start difference. First operand 19929 states and 60946 transitions. Second operand has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:47,519 INFO L93 Difference]: Finished difference Result 24230 states and 72312 transitions. [2021-06-05 05:51:47,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:51:47,522 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-06-05 05:51:47,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:47,554 INFO L225 Difference]: With dead ends: 24230 [2021-06-05 05:51:47,555 INFO L226 Difference]: Without dead ends: 23607 [2021-06-05 05:51:47,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 11.0ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:51:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23607 states. [2021-06-05 05:51:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23607 to 21236. [2021-06-05 05:51:47,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21236 states, 21235 states have (on average 3.0346597598304688) internal successors, (64441), 21235 states have internal predecessors, (64441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21236 states to 21236 states and 64441 transitions. [2021-06-05 05:51:47,986 INFO L78 Accepts]: Start accepts. Automaton has 21236 states and 64441 transitions. Word has length 51 [2021-06-05 05:51:47,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:47,987 INFO L482 AbstractCegarLoop]: Abstraction has 21236 states and 64441 transitions. [2021-06-05 05:51:47,987 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 9.333333333333334) internal successors, (56), 5 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:47,987 INFO L276 IsEmpty]: Start isEmpty. Operand 21236 states and 64441 transitions. [2021-06-05 05:51:48,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:51:48,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:48,006 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:51:48,212 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:48,212 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:48,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:48,212 INFO L82 PathProgramCache]: Analyzing trace with hash -1746190265, now seen corresponding path program 117 times [2021-06-05 05:51:48,212 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:48,212 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237452197] [2021-06-05 05:51:48,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:48,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:48,707 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:48,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237452197] [2021-06-05 05:51:48,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237452197] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:48,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611090944] [2021-06-05 05:51:48,708 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:48,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:51:48,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:48,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:51:48,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:49,064 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:51:49,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:51:49,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:49,073 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:49,073 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 05:51:49,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:51:49,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:51:49,277 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 05:51:49,277 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 05:51:49,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:49,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:49,289 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 05:51:49,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:51:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:49,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611090944] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:49,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:49,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 25] total 41 [2021-06-05 05:51:49,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093623330] [2021-06-05 05:51:49,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:51:49,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:49,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:51:49,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:51:49,634 INFO L87 Difference]: Start difference. First operand 21236 states and 64441 transitions. Second operand has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:52,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:52,831 INFO L93 Difference]: Finished difference Result 23988 states and 71909 transitions. [2021-06-05 05:51:52,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:51:52,831 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:51:52,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:52,865 INFO L225 Difference]: With dead ends: 23988 [2021-06-05 05:51:52,865 INFO L226 Difference]: Without dead ends: 23753 [2021-06-05 05:51:52,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1335 ImplicationChecksByTransitivity, 2665.7ms TimeCoverageRelationStatistics Valid=418, Invalid=5588, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:51:52,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23753 states. [2021-06-05 05:51:53,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23753 to 21710. [2021-06-05 05:51:53,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21710 states, 21709 states have (on average 3.023538624533604) internal successors, (65638), 21709 states have internal predecessors, (65638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:53,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21710 states to 21710 states and 65638 transitions. [2021-06-05 05:51:53,172 INFO L78 Accepts]: Start accepts. Automaton has 21710 states and 65638 transitions. Word has length 54 [2021-06-05 05:51:53,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:53,173 INFO L482 AbstractCegarLoop]: Abstraction has 21710 states and 65638 transitions. [2021-06-05 05:51:53,173 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.142857142857143) internal successors, (90), 41 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:53,173 INFO L276 IsEmpty]: Start isEmpty. Operand 21710 states and 65638 transitions. [2021-06-05 05:51:53,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:51:53,193 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:53,193 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:51:53,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:53,394 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:53,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:53,394 INFO L82 PathProgramCache]: Analyzing trace with hash 353158135, now seen corresponding path program 118 times [2021-06-05 05:51:53,394 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:53,394 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077290180] [2021-06-05 05:51:53,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:53,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:53,848 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:53,849 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:53,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077290180] [2021-06-05 05:51:53,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077290180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:53,849 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037680143] [2021-06-05 05:51:53,849 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:53,880 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:51:53,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:53,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:51:53,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:54,174 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:51:54,174 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 37 treesize of output 17 [2021-06-05 05:51:54,175 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:54,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:54,183 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 05:51:54,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-06-05 05:51:54,250 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:51:54,250 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 29 treesize of output 13 [2021-06-05 05:51:54,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:54,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:54,256 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 05:51:54,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:51:54,490 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:51:54,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037680143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:54,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:54,491 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-06-05 05:51:54,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107202126] [2021-06-05 05:51:54,491 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:51:54,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:54,491 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:51:54,491 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:51:54,491 INFO L87 Difference]: Start difference. First operand 21710 states and 65638 transitions. Second operand has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:56,340 INFO L93 Difference]: Finished difference Result 24391 states and 73022 transitions. [2021-06-05 05:51:56,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 05:51:56,340 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:51:56,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:56,369 INFO L225 Difference]: With dead ends: 24391 [2021-06-05 05:51:56,370 INFO L226 Difference]: Without dead ends: 24026 [2021-06-05 05:51:56,370 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1622.6ms TimeCoverageRelationStatistics Valid=263, Invalid=3159, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:51:56,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24026 states. [2021-06-05 05:51:56,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24026 to 21496. [2021-06-05 05:51:56,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21496 states, 21495 states have (on average 3.0284252151663176) internal successors, (65096), 21495 states have internal predecessors, (65096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:56,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21496 states to 21496 states and 65096 transitions. [2021-06-05 05:51:56,643 INFO L78 Accepts]: Start accepts. Automaton has 21496 states and 65096 transitions. Word has length 54 [2021-06-05 05:51:56,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:51:56,643 INFO L482 AbstractCegarLoop]: Abstraction has 21496 states and 65096 transitions. [2021-06-05 05:51:56,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:56,644 INFO L276 IsEmpty]: Start isEmpty. Operand 21496 states and 65096 transitions. [2021-06-05 05:51:56,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:51:56,664 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:51:56,664 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:51:56,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:56,865 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:51:56,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:51:56,865 INFO L82 PathProgramCache]: Analyzing trace with hash 2075616039, now seen corresponding path program 119 times [2021-06-05 05:51:56,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:51:56,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363021212] [2021-06-05 05:51:56,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:51:56,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:51:57,332 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:57,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:51:57,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363021212] [2021-06-05 05:51:57,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363021212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:57,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746133100] [2021-06-05 05:51:57,332 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:51:57,366 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:51:57,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:51:57,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:51:57,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:51:57,621 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:51:57,621 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 33 treesize of output 17 [2021-06-05 05:51:57,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:57,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:57,632 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 05:51:57,632 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:51:57,732 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:51:57,732 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:51:57,733 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:51:57,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:51:57,738 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 05:51:57,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:51:57,882 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:51:57,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746133100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:51:57,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:51:57,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 05:51:57,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502317787] [2021-06-05 05:51:57,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:51:57,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:51:57,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:51:57,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:51:57,883 INFO L87 Difference]: Start difference. First operand 21496 states and 65096 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:51:59,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:51:59,950 INFO L93 Difference]: Finished difference Result 24158 states and 72398 transitions. [2021-06-05 05:51:59,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:51:59,950 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:51:59,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:51:59,981 INFO L225 Difference]: With dead ends: 24158 [2021-06-05 05:51:59,981 INFO L226 Difference]: Without dead ends: 23790 [2021-06-05 05:51:59,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1555.0ms TimeCoverageRelationStatistics Valid=253, Invalid=3169, Unknown=0, NotChecked=0, Total=3422 [2021-06-05 05:52:00,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23790 states. [2021-06-05 05:52:00,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23790 to 21503. [2021-06-05 05:52:00,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21503 states, 21502 states have (on average 3.028136917496047) internal successors, (65111), 21502 states have internal predecessors, (65111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:00,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21503 states to 21503 states and 65111 transitions. [2021-06-05 05:52:00,324 INFO L78 Accepts]: Start accepts. Automaton has 21503 states and 65111 transitions. Word has length 54 [2021-06-05 05:52:00,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:00,324 INFO L482 AbstractCegarLoop]: Abstraction has 21503 states and 65111 transitions. [2021-06-05 05:52:00,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:00,325 INFO L276 IsEmpty]: Start isEmpty. Operand 21503 states and 65111 transitions. [2021-06-05 05:52:00,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:00,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:00,345 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:00,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 05:52:00,556 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:00,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:00,557 INFO L82 PathProgramCache]: Analyzing trace with hash 1172501167, now seen corresponding path program 120 times [2021-06-05 05:52:00,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:00,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8560322] [2021-06-05 05:52:00,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:00,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:00,983 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:00,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:00,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8560322] [2021-06-05 05:52:00,984 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8560322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:00,984 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2127023715] [2021-06-05 05:52:00,984 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:01,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:52:01,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:01,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:01,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:01,314 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:01,314 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 33 treesize of output 17 [2021-06-05 05:52:01,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:01,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:01,326 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 05:52:01,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:52:01,429 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:01,429 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 05:52:01,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:01,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:01,435 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 05:52:01,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:52:01,575 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:01,575 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2127023715] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:01,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:01,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 05:52:01,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [855490963] [2021-06-05 05:52:01,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:52:01,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:01,576 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:52:01,576 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1100, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:52:01,576 INFO L87 Difference]: Start difference. First operand 21503 states and 65111 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:03,600 INFO L93 Difference]: Finished difference Result 24269 states and 72692 transitions. [2021-06-05 05:52:03,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:52:03,600 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:03,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:03,632 INFO L225 Difference]: With dead ends: 24269 [2021-06-05 05:52:03,632 INFO L226 Difference]: Without dead ends: 23858 [2021-06-05 05:52:03,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1564.0ms TimeCoverageRelationStatistics Valid=254, Invalid=3286, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:52:03,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23858 states. [2021-06-05 05:52:03,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23858 to 21513. [2021-06-05 05:52:03,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21513 states, 21512 states have (on average 3.0280773521755298) internal successors, (65140), 21512 states have internal predecessors, (65140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21513 states to 21513 states and 65140 transitions. [2021-06-05 05:52:03,910 INFO L78 Accepts]: Start accepts. Automaton has 21513 states and 65140 transitions. Word has length 54 [2021-06-05 05:52:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:03,910 INFO L482 AbstractCegarLoop]: Abstraction has 21513 states and 65140 transitions. [2021-06-05 05:52:03,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:03,910 INFO L276 IsEmpty]: Start isEmpty. Operand 21513 states and 65140 transitions. [2021-06-05 05:52:03,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:03,931 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:03,931 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:04,132 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:04,133 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:04,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:04,133 INFO L82 PathProgramCache]: Analyzing trace with hash 1834374125, now seen corresponding path program 121 times [2021-06-05 05:52:04,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:04,133 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697776419] [2021-06-05 05:52:04,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:04,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:04,526 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:04,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:04,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697776419] [2021-06-05 05:52:04,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697776419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:04,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147491484] [2021-06-05 05:52:04,526 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:04,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:04,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:52:04,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:04,899 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:52:04,899 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 35 treesize of output 15 [2021-06-05 05:52:04,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:04,907 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:04,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:04,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-06-05 05:52:05,034 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:05,034 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 05:52:05,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:05,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:05,040 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 05:52:05,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:52:05,175 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:05,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147491484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:05,175 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:05,175 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 05:52:05,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528802131] [2021-06-05 05:52:05,175 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:52:05,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:05,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:52:05,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1098, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:52:05,176 INFO L87 Difference]: Start difference. First operand 21513 states and 65140 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:07,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:07,114 INFO L93 Difference]: Finished difference Result 25230 states and 75230 transitions. [2021-06-05 05:52:07,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:52:07,117 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:07,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:07,153 INFO L225 Difference]: With dead ends: 25230 [2021-06-05 05:52:07,153 INFO L226 Difference]: Without dead ends: 24862 [2021-06-05 05:52:07,154 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1569.8ms TimeCoverageRelationStatistics Valid=264, Invalid=3276, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:52:07,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24862 states. [2021-06-05 05:52:07,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24862 to 21541. [2021-06-05 05:52:07,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21541 states, 21540 states have (on average 3.027483751160631) internal successors, (65212), 21540 states have internal predecessors, (65212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:07,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21541 states to 21541 states and 65212 transitions. [2021-06-05 05:52:07,506 INFO L78 Accepts]: Start accepts. Automaton has 21541 states and 65212 transitions. Word has length 54 [2021-06-05 05:52:07,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:07,506 INFO L482 AbstractCegarLoop]: Abstraction has 21541 states and 65212 transitions. [2021-06-05 05:52:07,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:07,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21541 states and 65212 transitions. [2021-06-05 05:52:07,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:07,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:07,527 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:07,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 05:52:07,728 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:07,728 INFO L82 PathProgramCache]: Analyzing trace with hash 931259253, now seen corresponding path program 122 times [2021-06-05 05:52:07,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:07,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980581165] [2021-06-05 05:52:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:07,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:08,150 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:08,150 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:08,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980581165] [2021-06-05 05:52:08,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980581165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:08,150 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308178171] [2021-06-05 05:52:08,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:08,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:08,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:08,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:52:08,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:08,400 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:52:08,401 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 35 treesize of output 15 [2021-06-05 05:52:08,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:08,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:08,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:08,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2021-06-05 05:52:08,538 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:08,538 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 05:52:08,539 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:08,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:08,544 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 05:52:08,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:52:08,681 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:08,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308178171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:08,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:08,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 05:52:08,681 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616578970] [2021-06-05 05:52:08,681 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:52:08,681 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:08,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:52:08,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1099, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:52:08,682 INFO L87 Difference]: Start difference. First operand 21541 states and 65212 transitions. Second operand has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:10,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:10,870 INFO L93 Difference]: Finished difference Result 25117 states and 74931 transitions. [2021-06-05 05:52:10,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:52:10,871 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:10,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:10,905 INFO L225 Difference]: With dead ends: 25117 [2021-06-05 05:52:10,905 INFO L226 Difference]: Without dead ends: 24722 [2021-06-05 05:52:10,905 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 782 ImplicationChecksByTransitivity, 1518.0ms TimeCoverageRelationStatistics Valid=268, Invalid=3392, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:52:10,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24722 states. [2021-06-05 05:52:11,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24722 to 21534. [2021-06-05 05:52:11,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21534 states, 21533 states have (on average 3.0275855663400364) internal successors, (65193), 21533 states have internal predecessors, (65193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:11,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21534 states to 21534 states and 65193 transitions. [2021-06-05 05:52:11,182 INFO L78 Accepts]: Start accepts. Automaton has 21534 states and 65193 transitions. Word has length 54 [2021-06-05 05:52:11,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:11,182 INFO L482 AbstractCegarLoop]: Abstraction has 21534 states and 65193 transitions. [2021-06-05 05:52:11,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.4571428571428573) internal successors, (86), 34 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:11,182 INFO L276 IsEmpty]: Start isEmpty. Operand 21534 states and 65193 transitions. [2021-06-05 05:52:11,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:11,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:11,202 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:11,403 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:11,403 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:11,403 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:11,403 INFO L82 PathProgramCache]: Analyzing trace with hash -1287932921, now seen corresponding path program 123 times [2021-06-05 05:52:11,403 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:11,403 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126935848] [2021-06-05 05:52:11,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:11,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:11,867 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:11,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:11,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126935848] [2021-06-05 05:52:11,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126935848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:11,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967644795] [2021-06-05 05:52:11,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:11,908 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:52:11,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:11,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:52:11,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:12,186 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:12,187 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 05:52:12,187 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:12,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:12,195 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:12,195 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-06-05 05:52:12,392 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:12,401 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 05:52:12,401 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:52:12,402 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:12,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:12,414 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 05:52:12,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:52:12,766 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:12,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967644795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:12,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:12,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 40 [2021-06-05 05:52:12,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610519485] [2021-06-05 05:52:12,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:52:12,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:12,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:52:12,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1530, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:52:12,768 INFO L87 Difference]: Start difference. First operand 21534 states and 65193 transitions. Second operand has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:16,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:16,315 INFO L93 Difference]: Finished difference Result 23998 states and 71885 transitions. [2021-06-05 05:52:16,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-06-05 05:52:16,315 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:16,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:16,346 INFO L225 Difference]: With dead ends: 23998 [2021-06-05 05:52:16,346 INFO L226 Difference]: Without dead ends: 23763 [2021-06-05 05:52:16,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1624 ImplicationChecksByTransitivity, 2824.4ms TimeCoverageRelationStatistics Valid=466, Invalid=6674, Unknown=0, NotChecked=0, Total=7140 [2021-06-05 05:52:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23763 states. [2021-06-05 05:52:16,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23763 to 21881. [2021-06-05 05:52:16,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21881 states, 21880 states have (on average 3.020292504570384) internal successors, (66084), 21880 states have internal predecessors, (66084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:16,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21881 states to 21881 states and 66084 transitions. [2021-06-05 05:52:16,639 INFO L78 Accepts]: Start accepts. Automaton has 21881 states and 66084 transitions. Word has length 54 [2021-06-05 05:52:16,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:16,639 INFO L482 AbstractCegarLoop]: Abstraction has 21881 states and 66084 transitions. [2021-06-05 05:52:16,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.1951219512195124) internal successors, (90), 40 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:16,639 INFO L276 IsEmpty]: Start isEmpty. Operand 21881 states and 66084 transitions. [2021-06-05 05:52:16,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:16,662 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:16,662 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:16,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:16,877 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:16,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:16,877 INFO L82 PathProgramCache]: Analyzing trace with hash 811415479, now seen corresponding path program 124 times [2021-06-05 05:52:16,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:16,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094512529] [2021-06-05 05:52:16,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:17,459 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:17,459 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:17,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094512529] [2021-06-05 05:52:17,459 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094512529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:17,459 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175939063] [2021-06-05 05:52:17,460 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:17,499 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:17,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:17,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:52:17,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:17,690 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:52:17,690 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 35 treesize of output 15 [2021-06-05 05:52:17,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:17,702 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:17,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:17,703 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2021-06-05 05:52:17,904 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:17,904 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 05:52:17,905 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:17,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:17,912 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 05:52:17,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:52:18,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:52:18,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175939063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:18,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:18,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 34 [2021-06-05 05:52:18,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638272473] [2021-06-05 05:52:18,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 35 states [2021-06-05 05:52:18,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:18,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-06-05 05:52:18,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 05:52:18,074 INFO L87 Difference]: Start difference. First operand 21881 states and 66084 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:20,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:20,135 INFO L93 Difference]: Finished difference Result 24247 states and 72561 transitions. [2021-06-05 05:52:20,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:52:20,135 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:20,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:20,175 INFO L225 Difference]: With dead ends: 24247 [2021-06-05 05:52:20,175 INFO L226 Difference]: Without dead ends: 23907 [2021-06-05 05:52:20,176 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 39 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1712.6ms TimeCoverageRelationStatistics Valid=262, Invalid=3398, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:52:20,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23907 states. [2021-06-05 05:52:20,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23907 to 21849. [2021-06-05 05:52:20,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21849 states, 21848 states have (on average 3.020779934090077) internal successors, (65998), 21848 states have internal predecessors, (65998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:20,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21849 states to 21849 states and 65998 transitions. [2021-06-05 05:52:20,523 INFO L78 Accepts]: Start accepts. Automaton has 21849 states and 65998 transitions. Word has length 54 [2021-06-05 05:52:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:20,523 INFO L482 AbstractCegarLoop]: Abstraction has 21849 states and 65998 transitions. [2021-06-05 05:52:20,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 34 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:20,524 INFO L276 IsEmpty]: Start isEmpty. Operand 21849 states and 65998 transitions. [2021-06-05 05:52:20,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:20,546 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:20,546 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:20,746 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 05:52:20,747 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:20,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:20,747 INFO L82 PathProgramCache]: Analyzing trace with hash 107643771, now seen corresponding path program 125 times [2021-06-05 05:52:20,747 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:20,747 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996310517] [2021-06-05 05:52:20,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:20,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:21,255 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:21,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:21,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996310517] [2021-06-05 05:52:21,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996310517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:21,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408866072] [2021-06-05 05:52:21,255 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:21,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:52:21,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:21,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:21,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:21,793 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:21,793 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 29 treesize of output 17 [2021-06-05 05:52:21,794 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:21,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:21,807 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 05:52:21,807 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:50, output treesize:32 [2021-06-05 05:52:21,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:21,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:21,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:52:21,932 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:52:21,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:52:21,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:21,942 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:21,943 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 05:52:21,944 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-06-05 05:52:22,122 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:22,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408866072] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:22,122 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:22,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 42 [2021-06-05 05:52:22,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907041748] [2021-06-05 05:52:22,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:52:22,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:22,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:52:22,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:52:22,123 INFO L87 Difference]: Start difference. First operand 21849 states and 65998 transitions. Second operand has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:24,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:24,717 INFO L93 Difference]: Finished difference Result 24637 states and 73616 transitions. [2021-06-05 05:52:24,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:52:24,717 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:24,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:24,753 INFO L225 Difference]: With dead ends: 24637 [2021-06-05 05:52:24,753 INFO L226 Difference]: Without dead ends: 24221 [2021-06-05 05:52:24,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 2119.5ms TimeCoverageRelationStatistics Valid=327, Invalid=4503, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:52:24,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24221 states. [2021-06-05 05:52:25,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24221 to 21994. [2021-06-05 05:52:25,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21994 states, 21993 states have (on average 3.017687446005547) internal successors, (66368), 21993 states have internal predecessors, (66368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:25,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21994 states to 21994 states and 66368 transitions. [2021-06-05 05:52:25,110 INFO L78 Accepts]: Start accepts. Automaton has 21994 states and 66368 transitions. Word has length 54 [2021-06-05 05:52:25,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:25,110 INFO L482 AbstractCegarLoop]: Abstraction has 21994 states and 66368 transitions. [2021-06-05 05:52:25,110 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:25,110 INFO L276 IsEmpty]: Start isEmpty. Operand 21994 states and 66368 transitions. [2021-06-05 05:52:25,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:25,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:25,133 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:25,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2021-06-05 05:52:25,334 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:25,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:25,334 INFO L82 PathProgramCache]: Analyzing trace with hash -365517221, now seen corresponding path program 126 times [2021-06-05 05:52:25,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:25,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175691710] [2021-06-05 05:52:25,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:25,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:25,773 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:25,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:25,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175691710] [2021-06-05 05:52:25,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175691710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:25,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564764352] [2021-06-05 05:52:25,774 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:25,808 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:52:25,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:25,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:25,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:26,076 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:26,076 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 33 treesize of output 17 [2021-06-05 05:52:26,077 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:26,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:26,087 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 05:52:26,087 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:52:26,200 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:26,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:52:26,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:26,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:26,206 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 05:52:26,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:52:26,357 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:26,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564764352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:26,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:26,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:52:26,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559038427] [2021-06-05 05:52:26,358 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:52:26,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:26,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:52:26,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:52:26,359 INFO L87 Difference]: Start difference. First operand 21994 states and 66368 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:28,609 INFO L93 Difference]: Finished difference Result 25411 states and 75653 transitions. [2021-06-05 05:52:28,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:52:28,609 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:52:28,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:28,646 INFO L225 Difference]: With dead ends: 25411 [2021-06-05 05:52:28,646 INFO L226 Difference]: Without dead ends: 25043 [2021-06-05 05:52:28,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1588.0ms TimeCoverageRelationStatistics Valid=267, Invalid=3273, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:52:28,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25043 states. [2021-06-05 05:52:28,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25043 to 22001. [2021-06-05 05:52:28,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22001 states, 22000 states have (on average 3.0174090909090907) internal successors, (66383), 22000 states have internal predecessors, (66383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:28,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22001 states to 22001 states and 66383 transitions. [2021-06-05 05:52:28,999 INFO L78 Accepts]: Start accepts. Automaton has 22001 states and 66383 transitions. Word has length 54 [2021-06-05 05:52:28,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:28,999 INFO L482 AbstractCegarLoop]: Abstraction has 22001 states and 66383 transitions. [2021-06-05 05:52:28,999 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:28,999 INFO L276 IsEmpty]: Start isEmpty. Operand 22001 states and 66383 transitions. [2021-06-05 05:52:29,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:29,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:29,023 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:29,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:29,224 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:29,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:29,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1268632093, now seen corresponding path program 127 times [2021-06-05 05:52:29,224 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:29,224 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230801856] [2021-06-05 05:52:29,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:29,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:29,704 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:29,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:29,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230801856] [2021-06-05 05:52:29,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230801856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:29,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1945685737] [2021-06-05 05:52:29,705 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:29,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:52:29,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:30,016 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:52:30,016 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 37 treesize of output 17 [2021-06-05 05:52:30,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:30,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:30,027 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 05:52:30,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-06-05 05:52:30,138 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:30,138 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 29 treesize of output 13 [2021-06-05 05:52:30,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:30,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:30,144 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 05:52:30,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:52:30,297 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:30,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1945685737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:30,297 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:30,297 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:52:30,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372089184] [2021-06-05 05:52:30,298 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:52:30,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:30,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:52:30,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:52:30,298 INFO L87 Difference]: Start difference. First operand 22001 states and 66383 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:32,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:32,344 INFO L93 Difference]: Finished difference Result 24839 states and 74147 transitions. [2021-06-05 05:52:32,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:52:32,344 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:52:32,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:32,373 INFO L225 Difference]: With dead ends: 24839 [2021-06-05 05:52:32,373 INFO L226 Difference]: Without dead ends: 24428 [2021-06-05 05:52:32,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1643.9ms TimeCoverageRelationStatistics Valid=265, Invalid=3395, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:52:32,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24428 states. [2021-06-05 05:52:32,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24428 to 21966. [2021-06-05 05:52:32,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21966 states, 21965 states have (on average 3.018074208968814) internal successors, (66292), 21965 states have internal predecessors, (66292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:32,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21966 states to 21966 states and 66292 transitions. [2021-06-05 05:52:32,650 INFO L78 Accepts]: Start accepts. Automaton has 21966 states and 66292 transitions. Word has length 54 [2021-06-05 05:52:32,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:32,650 INFO L482 AbstractCegarLoop]: Abstraction has 21966 states and 66292 transitions. [2021-06-05 05:52:32,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:32,650 INFO L276 IsEmpty]: Start isEmpty. Operand 21966 states and 66292 transitions. [2021-06-05 05:52:32,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:32,672 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:32,672 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:32,872 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2021-06-05 05:52:32,873 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:32,874 INFO L82 PathProgramCache]: Analyzing trace with hash -606759135, now seen corresponding path program 128 times [2021-06-05 05:52:32,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:32,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097369942] [2021-06-05 05:52:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:32,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:33,356 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:33,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:33,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097369942] [2021-06-05 05:52:33,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097369942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:33,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382985037] [2021-06-05 05:52:33,357 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:33,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:33,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:33,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:52:33,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:33,629 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:52:33,630 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 37 treesize of output 17 [2021-06-05 05:52:33,630 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:33,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:29 [2021-06-05 05:52:33,785 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:33,786 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 29 treesize of output 13 [2021-06-05 05:52:33,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:33,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:33,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:52:33,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:33,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382985037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:33,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:33,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:52:33,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299859450] [2021-06-05 05:52:33,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:52:33,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:33,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:52:33,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:52:33,946 INFO L87 Difference]: Start difference. First operand 21966 states and 66292 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:36,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:36,061 INFO L93 Difference]: Finished difference Result 25605 states and 76167 transitions. [2021-06-05 05:52:36,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:52:36,062 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:52:36,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:36,099 INFO L225 Difference]: With dead ends: 25605 [2021-06-05 05:52:36,100 INFO L226 Difference]: Without dead ends: 25237 [2021-06-05 05:52:36,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 816 ImplicationChecksByTransitivity, 1609.8ms TimeCoverageRelationStatistics Valid=277, Invalid=3383, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:52:36,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25237 states. [2021-06-05 05:52:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25237 to 21994. [2021-06-05 05:52:36,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21994 states, 21993 states have (on average 3.0175055699540763) internal successors, (66364), 21993 states have internal predecessors, (66364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:36,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21994 states to 21994 states and 66364 transitions. [2021-06-05 05:52:36,406 INFO L78 Accepts]: Start accepts. Automaton has 21994 states and 66364 transitions. Word has length 54 [2021-06-05 05:52:36,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:36,406 INFO L482 AbstractCegarLoop]: Abstraction has 21994 states and 66364 transitions. [2021-06-05 05:52:36,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:36,406 INFO L276 IsEmpty]: Start isEmpty. Operand 21994 states and 66364 transitions. [2021-06-05 05:52:36,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:36,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:36,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:36,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable159 [2021-06-05 05:52:36,631 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:36,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1509874007, now seen corresponding path program 129 times [2021-06-05 05:52:36,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:36,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280857921] [2021-06-05 05:52:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:36,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:37,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:37,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280857921] [2021-06-05 05:52:37,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280857921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:37,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993511180] [2021-06-05 05:52:37,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:37,095 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:52:37,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:37,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 05:52:37,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:37,455 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:37,455 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 33 treesize of output 17 [2021-06-05 05:52:37,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:37,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:52:37,663 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:37,663 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 29 treesize of output 13 [2021-06-05 05:52:37,664 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:37,669 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:37,669 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 05:52:37,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:52:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:37,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993511180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:37,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:37,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 41 [2021-06-05 05:52:37,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708099976] [2021-06-05 05:52:37,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:52:37,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:37,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:52:37,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1599, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:52:37,816 INFO L87 Difference]: Start difference. First operand 21994 states and 66364 transitions. Second operand has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:40,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:40,513 INFO L93 Difference]: Finished difference Result 25692 states and 76400 transitions. [2021-06-05 05:52:40,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 05:52:40,514 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:52:40,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:40,549 INFO L225 Difference]: With dead ends: 25692 [2021-06-05 05:52:40,550 INFO L226 Difference]: Without dead ends: 25297 [2021-06-05 05:52:40,550 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1249 ImplicationChecksByTransitivity, 1944.0ms TimeCoverageRelationStatistics Valid=352, Invalid=4760, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:52:40,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25297 states. [2021-06-05 05:52:40,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25297 to 21987. [2021-06-05 05:52:40,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21987 states, 21986 states have (on average 3.0176021104339124) internal successors, (66345), 21986 states have internal predecessors, (66345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:40,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21987 states to 21987 states and 66345 transitions. [2021-06-05 05:52:40,845 INFO L78 Accepts]: Start accepts. Automaton has 21987 states and 66345 transitions. Word has length 54 [2021-06-05 05:52:40,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:40,845 INFO L482 AbstractCegarLoop]: Abstraction has 21987 states and 66345 transitions. [2021-06-05 05:52:40,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.1666666666666665) internal successors, (91), 41 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:40,845 INFO L276 IsEmpty]: Start isEmpty. Operand 21987 states and 66345 transitions. [2021-06-05 05:52:40,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:40,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:40,868 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:41,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable160 [2021-06-05 05:52:41,069 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:41,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:41,069 INFO L82 PathProgramCache]: Analyzing trace with hash 565901115, now seen corresponding path program 130 times [2021-06-05 05:52:41,069 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:41,069 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162124154] [2021-06-05 05:52:41,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:41,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:41,433 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:41,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:41,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162124154] [2021-06-05 05:52:41,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162124154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:41,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747845256] [2021-06-05 05:52:41,434 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:41,465 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:52:41,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:41,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:52:41,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:41,676 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:52:41,676 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 35 treesize of output 15 [2021-06-05 05:52:41,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:41,685 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:23 [2021-06-05 05:52:41,933 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 16 [2021-06-05 05:52:41,941 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:41,941 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:52:41,942 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:41,946 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:41,947 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 05:52:41,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:52:42,099 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:42,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [747845256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:42,100 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:42,100 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:52:42,100 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605883809] [2021-06-05 05:52:42,100 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:52:42,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:42,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:52:42,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:52:42,100 INFO L87 Difference]: Start difference. First operand 21987 states and 66345 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:44,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:44,189 INFO L93 Difference]: Finished difference Result 24409 states and 72933 transitions. [2021-06-05 05:52:44,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:52:44,190 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:52:44,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:44,221 INFO L225 Difference]: With dead ends: 24409 [2021-06-05 05:52:44,221 INFO L226 Difference]: Without dead ends: 24018 [2021-06-05 05:52:44,221 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 1482.9ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:52:44,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24018 states. [2021-06-05 05:52:44,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24018 to 21861. [2021-06-05 05:52:44,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21861 states, 21860 states have (on average 3.0205855443732847) internal successors, (66030), 21860 states have internal predecessors, (66030), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:44,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21861 states to 21861 states and 66030 transitions. [2021-06-05 05:52:44,505 INFO L78 Accepts]: Start accepts. Automaton has 21861 states and 66030 transitions. Word has length 54 [2021-06-05 05:52:44,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:44,505 INFO L482 AbstractCegarLoop]: Abstraction has 21861 states and 66030 transitions. [2021-06-05 05:52:44,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:44,506 INFO L276 IsEmpty]: Start isEmpty. Operand 21861 states and 66030 transitions. [2021-06-05 05:52:44,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:44,527 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:44,527 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:44,727 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:44,728 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:44,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:44,728 INFO L82 PathProgramCache]: Analyzing trace with hash 2062221955, now seen corresponding path program 131 times [2021-06-05 05:52:44,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:44,728 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022476873] [2021-06-05 05:52:44,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:44,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:45,243 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:45,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:45,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022476873] [2021-06-05 05:52:45,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022476873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:45,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782790468] [2021-06-05 05:52:45,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:45,276 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:52:45,276 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:45,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:45,277 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:45,556 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:45,556 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 33 treesize of output 17 [2021-06-05 05:52:45,557 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:45,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:45,565 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 05:52:45,565 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:52:45,631 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:45,632 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:52:45,632 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:45,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:45,637 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 05:52:45,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:52:45,779 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:45,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782790468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:45,779 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:45,779 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 36 [2021-06-05 05:52:45,780 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072390487] [2021-06-05 05:52:45,780 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:52:45,780 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:45,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:52:45,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1233, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:52:45,780 INFO L87 Difference]: Start difference. First operand 21861 states and 66030 transitions. Second operand has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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 05:52:47,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:47,993 INFO L93 Difference]: Finished difference Result 24866 states and 74208 transitions. [2021-06-05 05:52:47,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:52:47,993 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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 54 [2021-06-05 05:52:47,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:48,024 INFO L225 Difference]: With dead ends: 24866 [2021-06-05 05:52:48,024 INFO L226 Difference]: Without dead ends: 24450 [2021-06-05 05:52:48,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 1631.9ms TimeCoverageRelationStatistics Valid=268, Invalid=3392, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:52:48,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24450 states. [2021-06-05 05:52:48,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24450 to 22021. [2021-06-05 05:52:48,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22021 states, 22020 states have (on average 3.017529518619437) internal successors, (66446), 22020 states have internal predecessors, (66446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:48,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22021 states to 22021 states and 66446 transitions. [2021-06-05 05:52:48,321 INFO L78 Accepts]: Start accepts. Automaton has 22021 states and 66446 transitions. Word has length 54 [2021-06-05 05:52:48,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:48,321 INFO L482 AbstractCegarLoop]: Abstraction has 22021 states and 66446 transitions. [2021-06-05 05:52:48,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4054054054054053) internal successors, (89), 36 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 05:52:48,321 INFO L276 IsEmpty]: Start isEmpty. Operand 22021 states and 66446 transitions. [2021-06-05 05:52:48,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:48,344 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:48,344 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:48,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:48,544 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:48,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:48,545 INFO L82 PathProgramCache]: Analyzing trace with hash 1589060963, now seen corresponding path program 132 times [2021-06-05 05:52:48,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:48,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338948963] [2021-06-05 05:52:48,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:48,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:49,031 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:49,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:49,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338948963] [2021-06-05 05:52:49,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338948963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:49,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399950542] [2021-06-05 05:52:49,032 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:49,084 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:52:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:49,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:52:49,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:49,367 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:49,368 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 33 treesize of output 17 [2021-06-05 05:52:49,369 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:49,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:49,379 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 05:52:49,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:52:49,479 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:49,479 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 27 treesize of output 13 [2021-06-05 05:52:49,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:49,485 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:49,485 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 05:52:49,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 05:52:49,626 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:49,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399950542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:49,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:49,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:52:49,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974358300] [2021-06-05 05:52:49,626 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:52:49,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:49,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:52:49,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1166, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:52:49,627 INFO L87 Difference]: Start difference. First operand 22021 states and 66446 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:51,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:51,598 INFO L93 Difference]: Finished difference Result 25640 states and 76245 transitions. [2021-06-05 05:52:51,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:52:51,599 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:52:51,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:51,634 INFO L225 Difference]: With dead ends: 25640 [2021-06-05 05:52:51,634 INFO L226 Difference]: Without dead ends: 25272 [2021-06-05 05:52:51,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1628.7ms TimeCoverageRelationStatistics Valid=269, Invalid=3391, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:52:51,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25272 states. [2021-06-05 05:52:51,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25272 to 22028. [2021-06-05 05:52:51,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22028 states, 22027 states have (on average 3.0172515549098833) internal successors, (66461), 22027 states have internal predecessors, (66461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:51,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22028 states to 22028 states and 66461 transitions. [2021-06-05 05:52:51,927 INFO L78 Accepts]: Start accepts. Automaton has 22028 states and 66461 transitions. Word has length 54 [2021-06-05 05:52:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:51,928 INFO L482 AbstractCegarLoop]: Abstraction has 22028 states and 66461 transitions. [2021-06-05 05:52:51,928 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 22028 states and 66461 transitions. [2021-06-05 05:52:51,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:51,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:51,949 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:52,149 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:52,150 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:52,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:52,150 INFO L82 PathProgramCache]: Analyzing trace with hash 685946091, now seen corresponding path program 133 times [2021-06-05 05:52:52,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:52,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781871206] [2021-06-05 05:52:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:52,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:52,572 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:52,572 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781871206] [2021-06-05 05:52:52,572 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781871206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:52,572 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [118183158] [2021-06-05 05:52:52,572 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:52,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:52:52,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:52,849 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:52:52,850 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 37 treesize of output 17 [2021-06-05 05:52:52,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:52,859 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:52,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:52,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-06-05 05:52:52,961 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:52,961 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 29 treesize of output 13 [2021-06-05 05:52:52,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:52,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:52,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:52,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:52:53,125 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:53,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [118183158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:53,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:53,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:52:53,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182586191] [2021-06-05 05:52:53,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:52:53,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:53,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:52:53,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:52:53,127 INFO L87 Difference]: Start difference. First operand 22028 states and 66461 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:55,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:55,249 INFO L93 Difference]: Finished difference Result 25068 states and 74739 transitions. [2021-06-05 05:52:55,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:52:55,249 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:52:55,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:55,284 INFO L225 Difference]: With dead ends: 25068 [2021-06-05 05:52:55,284 INFO L226 Difference]: Without dead ends: 24657 [2021-06-05 05:52:55,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1631.6ms TimeCoverageRelationStatistics Valid=267, Invalid=3515, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:52:55,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24657 states. [2021-06-05 05:52:55,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24657 to 21993. [2021-06-05 05:52:55,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21993 states, 21992 states have (on average 3.0179156056747907) internal successors, (66370), 21992 states have internal predecessors, (66370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:55,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21993 states to 21993 states and 66370 transitions. [2021-06-05 05:52:55,581 INFO L78 Accepts]: Start accepts. Automaton has 21993 states and 66370 transitions. Word has length 54 [2021-06-05 05:52:55,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:55,581 INFO L482 AbstractCegarLoop]: Abstraction has 21993 states and 66370 transitions. [2021-06-05 05:52:55,581 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:55,581 INFO L276 IsEmpty]: Start isEmpty. Operand 21993 states and 66370 transitions. [2021-06-05 05:52:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:55,602 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:55,603 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:55,824 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable164 [2021-06-05 05:52:55,824 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:55,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:55,824 INFO L82 PathProgramCache]: Analyzing trace with hash 1347819049, now seen corresponding path program 134 times [2021-06-05 05:52:55,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:55,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229874811] [2021-06-05 05:52:55,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:55,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:56,276 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:56,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229874811] [2021-06-05 05:52:56,276 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229874811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:56,276 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994376698] [2021-06-05 05:52:56,277 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:56,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:52:56,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:56,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:52:56,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:52:56,537 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:52:56,537 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 35 treesize of output 15 [2021-06-05 05:52:56,538 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:56,546 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,546 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:25 [2021-06-05 05:52:56,678 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:52:56,678 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 29 treesize of output 13 [2021-06-05 05:52:56,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:52:56,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:52:56,684 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 05:52:56,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:52:56,824 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:56,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994376698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:56,825 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:52:56,825 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:52:56,825 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420592872] [2021-06-05 05:52:56,825 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:52:56,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:52:56,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:52:56,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:52:56,825 INFO L87 Difference]: Start difference. First operand 21993 states and 66370 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:58,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:52:58,964 INFO L93 Difference]: Finished difference Result 25834 states and 76759 transitions. [2021-06-05 05:52:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:52:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:52:58,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:52:59,000 INFO L225 Difference]: With dead ends: 25834 [2021-06-05 05:52:59,000 INFO L226 Difference]: Without dead ends: 25466 [2021-06-05 05:52:59,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 822 ImplicationChecksByTransitivity, 1609.5ms TimeCoverageRelationStatistics Valid=280, Invalid=3502, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:52:59,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25466 states. [2021-06-05 05:52:59,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25466 to 22021. [2021-06-05 05:52:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22021 states, 22020 states have (on average 3.0173478655767485) internal successors, (66442), 22020 states have internal predecessors, (66442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:52:59,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22021 states to 22021 states and 66442 transitions. [2021-06-05 05:52:59,298 INFO L78 Accepts]: Start accepts. Automaton has 22021 states and 66442 transitions. Word has length 54 [2021-06-05 05:52:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:52:59,298 INFO L482 AbstractCegarLoop]: Abstraction has 22021 states and 66442 transitions. [2021-06-05 05:52:59,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:52:59,298 INFO L276 IsEmpty]: Start isEmpty. Operand 22021 states and 66442 transitions. [2021-06-05 05:52:59,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:52:59,319 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:52:59,319 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:52:59,519 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:59,520 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:52:59,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:52:59,520 INFO L82 PathProgramCache]: Analyzing trace with hash 444704177, now seen corresponding path program 135 times [2021-06-05 05:52:59,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:52:59,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403791154] [2021-06-05 05:52:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:52:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:52:59,947 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:52:59,947 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:52:59,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403791154] [2021-06-05 05:52:59,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403791154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:52:59,947 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1006610672] [2021-06-05 05:52:59,947 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:52:59,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:52:59,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:52:59,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 56 conjunts are in the unsatisfiable core [2021-06-05 05:52:59,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:00,332 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:00,332 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 31 treesize of output 15 [2021-06-05 05:53:00,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:00,341 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 05:53:00,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:25 [2021-06-05 05:53:00,518 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:00,525 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 05:53:00,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 31 treesize of output 23 [2021-06-05 05:53:00,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:00,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:00,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:53:00,785 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:00,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1006610672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:00,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:00,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 41 [2021-06-05 05:53:00,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757272982] [2021-06-05 05:53:00,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:53:00,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:00,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:53:00,786 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:53:00,786 INFO L87 Difference]: Start difference. First operand 22021 states and 66442 transitions. Second operand has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:04,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:04,145 INFO L93 Difference]: Finished difference Result 25688 states and 76292 transitions. [2021-06-05 05:53:04,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:53:04,145 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:04,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:04,182 INFO L225 Difference]: With dead ends: 25688 [2021-06-05 05:53:04,182 INFO L226 Difference]: Without dead ends: 25382 [2021-06-05 05:53:04,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 32 SyntacticMatches, 4 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1533 ImplicationChecksByTransitivity, 2630.0ms TimeCoverageRelationStatistics Valid=474, Invalid=6332, Unknown=0, NotChecked=0, Total=6806 [2021-06-05 05:53:04,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25382 states. [2021-06-05 05:53:04,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25382 to 22245. [2021-06-05 05:53:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22245 states, 22244 states have (on average 3.0129023556914225) internal successors, (67019), 22244 states have internal predecessors, (67019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:04,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22245 states to 22245 states and 67019 transitions. [2021-06-05 05:53:04,573 INFO L78 Accepts]: Start accepts. Automaton has 22245 states and 67019 transitions. Word has length 54 [2021-06-05 05:53:04,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:04,573 INFO L482 AbstractCegarLoop]: Abstraction has 22245 states and 67019 transitions. [2021-06-05 05:53:04,573 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.2142857142857144) internal successors, (93), 41 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:04,573 INFO L276 IsEmpty]: Start isEmpty. Operand 22245 states and 67019 transitions. [2021-06-05 05:53:04,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:04,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:04,594 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:04,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2021-06-05 05:53:04,795 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:04,796 INFO L82 PathProgramCache]: Analyzing trace with hash 1655350275, now seen corresponding path program 136 times [2021-06-05 05:53:04,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:04,796 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238787320] [2021-06-05 05:53:04,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:04,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:05,245 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:05,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:05,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238787320] [2021-06-05 05:53:05,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238787320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:05,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621844635] [2021-06-05 05:53:05,246 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:05,286 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:05,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:05,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:53:05,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:05,528 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:53:05,528 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 35 treesize of output 15 [2021-06-05 05:53:05,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:05,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:05,537 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 05:53:05,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-06-05 05:53:05,669 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:05,669 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 05:53:05,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:05,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:05,675 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 05:53:05,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:53:05,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:05,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621844635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:05,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:05,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:53:05,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623751513] [2021-06-05 05:53:05,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:53:05,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:05,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:53:05,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:53:05,816 INFO L87 Difference]: Start difference. First operand 22245 states and 67019 transitions. Second operand has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:08,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:08,171 INFO L93 Difference]: Finished difference Result 25868 states and 76861 transitions. [2021-06-05 05:53:08,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:53:08,172 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:08,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:08,208 INFO L225 Difference]: With dead ends: 25868 [2021-06-05 05:53:08,208 INFO L226 Difference]: Without dead ends: 25530 [2021-06-05 05:53:08,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1642.7ms TimeCoverageRelationStatistics Valid=279, Invalid=3503, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:53:08,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25530 states. [2021-06-05 05:53:08,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25530 to 22014. [2021-06-05 05:53:08,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22014 states, 22013 states have (on average 3.017444237496025) internal successors, (66423), 22013 states have internal predecessors, (66423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:08,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22014 states to 22014 states and 66423 transitions. [2021-06-05 05:53:08,500 INFO L78 Accepts]: Start accepts. Automaton has 22014 states and 66423 transitions. Word has length 54 [2021-06-05 05:53:08,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:08,500 INFO L482 AbstractCegarLoop]: Abstraction has 22014 states and 66423 transitions. [2021-06-05 05:53:08,500 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.5833333333333335) internal successors, (93), 35 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:08,500 INFO L276 IsEmpty]: Start isEmpty. Operand 22014 states and 66423 transitions. [2021-06-05 05:53:08,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:08,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:08,521 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:08,721 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:08,721 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:08,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:08,722 INFO L82 PathProgramCache]: Analyzing trace with hash -1774487997, now seen corresponding path program 137 times [2021-06-05 05:53:08,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:08,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711096746] [2021-06-05 05:53:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:08,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:09,093 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:09,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:09,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711096746] [2021-06-05 05:53:09,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1711096746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:09,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771769940] [2021-06-05 05:53:09,094 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:09,129 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:53:09,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:09,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:09,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:09,344 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:09,344 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:53:09,345 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:09,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:09,353 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 05:53:09,353 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:53:09,483 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:09,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:53:09,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:09,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:09,490 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 05:53:09,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:53:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:09,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771769940] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:09,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:09,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:53:09,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821418690] [2021-06-05 05:53:09,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:53:09,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:09,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:53:09,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1167, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:53:09,635 INFO L87 Difference]: Start difference. First operand 22014 states and 66423 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:53:12,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:12,100 INFO L93 Difference]: Finished difference Result 24547 states and 73295 transitions. [2021-06-05 05:53:12,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:53:12,100 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:53:12,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:12,131 INFO L225 Difference]: With dead ends: 24547 [2021-06-05 05:53:12,132 INFO L226 Difference]: Without dead ends: 24156 [2021-06-05 05:53:12,132 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1617.3ms TimeCoverageRelationStatistics Valid=274, Invalid=3758, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:53:12,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24156 states. [2021-06-05 05:53:12,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24156 to 21909. [2021-06-05 05:53:12,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21909 states, 21908 states have (on average 3.0198101150264742) internal successors, (66158), 21908 states have internal predecessors, (66158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:12,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21909 states to 21909 states and 66158 transitions. [2021-06-05 05:53:12,411 INFO L78 Accepts]: Start accepts. Automaton has 21909 states and 66158 transitions. Word has length 54 [2021-06-05 05:53:12,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:12,411 INFO L482 AbstractCegarLoop]: Abstraction has 21909 states and 66158 transitions. [2021-06-05 05:53:12,411 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:53:12,411 INFO L276 IsEmpty]: Start isEmpty. Operand 21909 states and 66158 transitions. [2021-06-05 05:53:12,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:12,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:12,432 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:12,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 05:53:12,632 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:12,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:12,633 INFO L82 PathProgramCache]: Analyzing trace with hash 897417097, now seen corresponding path program 138 times [2021-06-05 05:53:12,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:12,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104197757] [2021-06-05 05:53:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:13,011 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:13,012 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:13,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104197757] [2021-06-05 05:53:13,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104197757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:13,012 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145290120] [2021-06-05 05:53:13,012 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:13,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:53:13,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:13,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:13,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:13,223 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:13,223 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 33 treesize of output 17 [2021-06-05 05:53:13,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:13,231 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 05:53:13,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:44, output treesize:26 [2021-06-05 05:53:13,396 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:13,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:53:13,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:13,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:13,402 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 05:53:13,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:53:13,540 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:13,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2145290120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:13,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:13,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:53:13,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325590808] [2021-06-05 05:53:13,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:53:13,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:13,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:53:13,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:53:13,541 INFO L87 Difference]: Start difference. First operand 21909 states and 66158 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:53:15,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:15,910 INFO L93 Difference]: Finished difference Result 26122 states and 77506 transitions. [2021-06-05 05:53:15,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:53:15,910 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:53:15,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:15,946 INFO L225 Difference]: With dead ends: 26122 [2021-06-05 05:53:15,946 INFO L226 Difference]: Without dead ends: 25754 [2021-06-05 05:53:15,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 1545.2ms TimeCoverageRelationStatistics Valid=291, Invalid=3491, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:53:15,972 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25754 states. [2021-06-05 05:53:16,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25754 to 21949. [2021-06-05 05:53:16,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21949 states, 21948 states have (on average 3.019045015491161) internal successors, (66262), 21948 states have internal predecessors, (66262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:16,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21949 states to 21949 states and 66262 transitions. [2021-06-05 05:53:16,236 INFO L78 Accepts]: Start accepts. Automaton has 21949 states and 66262 transitions. Word has length 54 [2021-06-05 05:53:16,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:16,236 INFO L482 AbstractCegarLoop]: Abstraction has 21949 states and 66262 transitions. [2021-06-05 05:53:16,236 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:53:16,236 INFO L276 IsEmpty]: Start isEmpty. Operand 21949 states and 66262 transitions. [2021-06-05 05:53:16,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:16,256 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:16,256 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:16,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2021-06-05 05:53:16,456 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:16,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:16,457 INFO L82 PathProgramCache]: Analyzing trace with hash -5697775, now seen corresponding path program 139 times [2021-06-05 05:53:16,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:16,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554138423] [2021-06-05 05:53:16,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:16,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:16,927 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:16,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:16,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554138423] [2021-06-05 05:53:16,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554138423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:16,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1078098497] [2021-06-05 05:53:16,927 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:16,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:16,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:53:16,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:17,138 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:53:17,138 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 35 treesize of output 15 [2021-06-05 05:53:17,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:17,145 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 05:53:17,145 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:20 [2021-06-05 05:53:17,308 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:17,308 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 05:53:17,309 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:17,314 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:17,314 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 05:53:17,314 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:53:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:17,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1078098497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:17,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:17,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:53:17,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485503248] [2021-06-05 05:53:17,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:53:17,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:17,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:53:17,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:53:17,455 INFO L87 Difference]: Start difference. First operand 21949 states and 66262 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:53:19,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:19,920 INFO L93 Difference]: Finished difference Result 26161 states and 77609 transitions. [2021-06-05 05:53:19,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:53:19,920 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:53:19,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:19,958 INFO L225 Difference]: With dead ends: 26161 [2021-06-05 05:53:19,958 INFO L226 Difference]: Without dead ends: 25766 [2021-06-05 05:53:19,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1699.8ms TimeCoverageRelationStatistics Valid=305, Invalid=3727, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:53:19,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25766 states. [2021-06-05 05:53:20,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25766 to 21942. [2021-06-05 05:53:20,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21942 states, 21941 states have (on average 3.0191422451118908) internal successors, (66243), 21941 states have internal predecessors, (66243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:20,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21942 states to 21942 states and 66243 transitions. [2021-06-05 05:53:20,254 INFO L78 Accepts]: Start accepts. Automaton has 21942 states and 66243 transitions. Word has length 54 [2021-06-05 05:53:20,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:20,254 INFO L482 AbstractCegarLoop]: Abstraction has 21942 states and 66243 transitions. [2021-06-05 05:53:20,254 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:53:20,254 INFO L276 IsEmpty]: Start isEmpty. Operand 21942 states and 66243 transitions. [2021-06-05 05:53:20,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:20,275 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:20,275 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:20,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:20,477 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:20,477 INFO L82 PathProgramCache]: Analyzing trace with hash 2070077347, now seen corresponding path program 140 times [2021-06-05 05:53:20,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:20,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396605081] [2021-06-05 05:53:20,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:20,850 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:20,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:20,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396605081] [2021-06-05 05:53:20,851 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396605081] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:20,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912167535] [2021-06-05 05:53:20,851 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:20,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:20,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:20,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:53:20,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:21,127 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:53:21,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 05:53:21,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:21,136 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:21,137 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 05:53:21,137 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:22 [2021-06-05 05:53:21,299 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:21,300 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 05:53:21,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:21,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:21,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:21,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:53:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:21,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912167535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:21,615 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:21,615 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 35 [2021-06-05 05:53:21,615 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006270063] [2021-06-05 05:53:21,615 INFO L462 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-06-05 05:53:21,615 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-06-05 05:53:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1165, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:53:21,615 INFO L87 Difference]: Start difference. First operand 21942 states and 66243 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:53:23,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:23,902 INFO L93 Difference]: Finished difference Result 25642 states and 76164 transitions. [2021-06-05 05:53:23,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:53:23,903 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 54 [2021-06-05 05:53:23,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:23,937 INFO L225 Difference]: With dead ends: 25642 [2021-06-05 05:53:23,938 INFO L226 Difference]: Without dead ends: 25251 [2021-06-05 05:53:23,938 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 899 ImplicationChecksByTransitivity, 1826.6ms TimeCoverageRelationStatistics Valid=292, Invalid=3868, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:53:23,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25251 states. [2021-06-05 05:53:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25251 to 21921. [2021-06-05 05:53:24,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21921 states, 21920 states have (on average 3.019616788321168) internal successors, (66190), 21920 states have internal predecessors, (66190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:24,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21921 states to 21921 states and 66190 transitions. [2021-06-05 05:53:24,224 INFO L78 Accepts]: Start accepts. Automaton has 21921 states and 66190 transitions. Word has length 54 [2021-06-05 05:53:24,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:24,225 INFO L482 AbstractCegarLoop]: Abstraction has 21921 states and 66190 transitions. [2021-06-05 05:53:24,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 35 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 05:53:24,225 INFO L276 IsEmpty]: Start isEmpty. Operand 21921 states and 66190 transitions. [2021-06-05 05:53:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:24,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:24,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:24,446 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable174 [2021-06-05 05:53:24,446 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:24,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:24,446 INFO L82 PathProgramCache]: Analyzing trace with hash 2110866603, now seen corresponding path program 141 times [2021-06-05 05:53:24,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:24,447 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984359202] [2021-06-05 05:53:24,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:24,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:24,815 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:24,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:24,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984359202] [2021-06-05 05:53:24,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984359202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:24,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405185907] [2021-06-05 05:53:24,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:24,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 05:53:24,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:24,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:53:24,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:25,155 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:25,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 05:53:25,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:25,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:25,162 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 05:53:25,163 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:22 [2021-06-05 05:53:25,323 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:25,323 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 29 treesize of output 13 [2021-06-05 05:53:25,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:25,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:25,329 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 05:53:25,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:53:25,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:25,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405185907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:25,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:25,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 39 [2021-06-05 05:53:25,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593032890] [2021-06-05 05:53:25,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:53:25,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:25,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:53:25,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:53:25,476 INFO L87 Difference]: Start difference. First operand 21921 states and 66190 transitions. Second operand has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:28,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:28,275 INFO L93 Difference]: Finished difference Result 24717 states and 73758 transitions. [2021-06-05 05:53:28,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:53:28,276 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:28,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:28,307 INFO L225 Difference]: With dead ends: 24717 [2021-06-05 05:53:28,307 INFO L226 Difference]: Without dead ends: 24326 [2021-06-05 05:53:28,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 34 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1801.4ms TimeCoverageRelationStatistics Valid=333, Invalid=4779, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:53:28,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24326 states. [2021-06-05 05:53:28,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24326 to 22030. [2021-06-05 05:53:28,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22030 states, 22029 states have (on average 3.0175677516001636) internal successors, (66474), 22029 states have internal predecessors, (66474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:28,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22030 states to 22030 states and 66474 transitions. [2021-06-05 05:53:28,613 INFO L78 Accepts]: Start accepts. Automaton has 22030 states and 66474 transitions. Word has length 54 [2021-06-05 05:53:28,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:28,614 INFO L482 AbstractCegarLoop]: Abstraction has 22030 states and 66474 transitions. [2021-06-05 05:53:28,614 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.275) internal successors, (91), 39 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:28,614 INFO L276 IsEmpty]: Start isEmpty. Operand 22030 states and 66474 transitions. [2021-06-05 05:53:28,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:28,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:28,636 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:28,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:28,838 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:28,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:28,838 INFO L82 PathProgramCache]: Analyzing trace with hash -726971679, now seen corresponding path program 142 times [2021-06-05 05:53:28,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:28,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001588730] [2021-06-05 05:53:28,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:28,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:29,330 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:29,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:29,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001588730] [2021-06-05 05:53:29,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001588730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:29,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743067666] [2021-06-05 05:53:29,331 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:29,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:29,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:29,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:53:29,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:29,676 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:53:29,677 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 37 treesize of output 17 [2021-06-05 05:53:29,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:29,685 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 05:53:29,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-06-05 05:53:29,755 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:29,755 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 29 treesize of output 13 [2021-06-05 05:53:29,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:29,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:29,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:53:29,907 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:29,908 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1743067666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:29,908 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:29,908 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:29,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744185684] [2021-06-05 05:53:29,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:29,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:29,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:29,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:29,908 INFO L87 Difference]: Start difference. First operand 22030 states and 66474 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:32,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:32,101 INFO L93 Difference]: Finished difference Result 24881 states and 74266 transitions. [2021-06-05 05:53:32,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:53:32,101 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:32,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:32,133 INFO L225 Difference]: With dead ends: 24881 [2021-06-05 05:53:32,133 INFO L226 Difference]: Without dead ends: 24465 [2021-06-05 05:53:32,133 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 836 ImplicationChecksByTransitivity, 1709.8ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:53:32,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24465 states. [2021-06-05 05:53:32,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24465 to 22235. [2021-06-05 05:53:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22235 states, 22234 states have (on average 3.0135828011154087) internal successors, (67004), 22234 states have internal predecessors, (67004), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:32,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22235 states to 22235 states and 67004 transitions. [2021-06-05 05:53:32,423 INFO L78 Accepts]: Start accepts. Automaton has 22235 states and 67004 transitions. Word has length 54 [2021-06-05 05:53:32,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:32,423 INFO L482 AbstractCegarLoop]: Abstraction has 22235 states and 67004 transitions. [2021-06-05 05:53:32,423 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:32,423 INFO L276 IsEmpty]: Start isEmpty. Operand 22235 states and 67004 transitions. [2021-06-05 05:53:32,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:32,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:32,445 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:32,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:32,648 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:32,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:32,648 INFO L82 PathProgramCache]: Analyzing trace with hash -1200132671, now seen corresponding path program 143 times [2021-06-05 05:53:32,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:32,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443839436] [2021-06-05 05:53:32,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:32,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:33,047 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:33,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:33,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443839436] [2021-06-05 05:53:33,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443839436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:33,048 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861205487] [2021-06-05 05:53:33,048 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:33,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:53:33,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:53:33,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:33,377 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:33,377 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 33 treesize of output 17 [2021-06-05 05:53:33,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:33,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:33,389 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 05:53:33,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:57, output treesize:39 [2021-06-05 05:53:33,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:33,512 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:33,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:53:33,513 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:33,521 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:33,521 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 05:53:33,521 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-06-05 05:53:33,668 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:33,668 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861205487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:33,668 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:33,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:53:33,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76376998] [2021-06-05 05:53:33,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:53:33,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:33,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:53:33,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:53:33,669 INFO L87 Difference]: Start difference. First operand 22235 states and 67004 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:35,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:35,989 INFO L93 Difference]: Finished difference Result 25017 states and 74620 transitions. [2021-06-05 05:53:35,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:53:35,996 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:35,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:36,033 INFO L225 Difference]: With dead ends: 25017 [2021-06-05 05:53:36,034 INFO L226 Difference]: Without dead ends: 24649 [2021-06-05 05:53:36,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 1630.5ms TimeCoverageRelationStatistics Valid=276, Invalid=3506, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:53:36,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24649 states. [2021-06-05 05:53:36,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24649 to 22242. [2021-06-05 05:53:36,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22242 states, 22241 states have (on average 3.013308754102783) internal successors, (67019), 22241 states have internal predecessors, (67019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22242 states to 22242 states and 67019 transitions. [2021-06-05 05:53:36,394 INFO L78 Accepts]: Start accepts. Automaton has 22242 states and 67019 transitions. Word has length 54 [2021-06-05 05:53:36,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:36,396 INFO L482 AbstractCegarLoop]: Abstraction has 22242 states and 67019 transitions. [2021-06-05 05:53:36,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:36,396 INFO L276 IsEmpty]: Start isEmpty. Operand 22242 states and 67019 transitions. [2021-06-05 05:53:36,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:36,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:36,425 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:36,647 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:36,648 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:36,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:36,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2103247543, now seen corresponding path program 144 times [2021-06-05 05:53:36,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:36,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761696679] [2021-06-05 05:53:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:36,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:37,062 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:37,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:37,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761696679] [2021-06-05 05:53:37,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761696679] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:37,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380589964] [2021-06-05 05:53:37,062 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:37,094 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:53:37,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:37,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:53:37,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:37,519 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:37,521 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:37,521 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:37,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 05:53:37,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,548 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 05:53:37,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:30 [2021-06-05 05:53:37,658 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:37,659 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 05:53:37,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:37,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:37,665 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 05:53:37,665 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:53:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:37,856 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380589964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:37,856 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:37,856 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-06-05 05:53:37,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488281647] [2021-06-05 05:53:37,856 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:53:37,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:37,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:53:37,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:37,857 INFO L87 Difference]: Start difference. First operand 22242 states and 67019 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:40,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:40,622 INFO L93 Difference]: Finished difference Result 25133 states and 74928 transitions. [2021-06-05 05:53:40,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:53:40,622 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:40,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:40,656 INFO L225 Difference]: With dead ends: 25133 [2021-06-05 05:53:40,657 INFO L226 Difference]: Without dead ends: 24722 [2021-06-05 05:53:40,657 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1137 ImplicationChecksByTransitivity, 2007.6ms TimeCoverageRelationStatistics Valid=346, Invalid=4484, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:53:40,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24722 states. [2021-06-05 05:53:40,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24722 to 22207. [2021-06-05 05:53:40,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22207 states, 22206 states have (on average 3.0139601909393856) internal successors, (66928), 22206 states have internal predecessors, (66928), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:40,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22207 states to 22207 states and 66928 transitions. [2021-06-05 05:53:40,948 INFO L78 Accepts]: Start accepts. Automaton has 22207 states and 66928 transitions. Word has length 54 [2021-06-05 05:53:40,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:40,948 INFO L482 AbstractCegarLoop]: Abstraction has 22207 states and 66928 transitions. [2021-06-05 05:53:40,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:40,948 INFO L276 IsEmpty]: Start isEmpty. Operand 22207 states and 66928 transitions. [2021-06-05 05:53:40,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:40,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:40,970 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:41,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 05:53:41,170 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:41,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:41,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1441374585, now seen corresponding path program 145 times [2021-06-05 05:53:41,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:41,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072354586] [2021-06-05 05:53:41,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:41,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:41,563 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:41,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:41,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072354586] [2021-06-05 05:53:41,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072354586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:41,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904263801] [2021-06-05 05:53:41,564 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:41,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:41,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:53:41,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:41,841 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:53:41,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 05:53:41,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:41,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:41,850 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 05:53:41,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:25 [2021-06-05 05:53:41,985 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:41,986 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 05:53:41,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:41,991 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:41,991 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 05:53:41,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 05:53:42,134 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:42,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904263801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:42,135 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:42,135 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:53:42,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067163677] [2021-06-05 05:53:42,135 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:53:42,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:42,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:53:42,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:53:42,135 INFO L87 Difference]: Start difference. First operand 22207 states and 66928 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:44,153 INFO L93 Difference]: Finished difference Result 26041 states and 77324 transitions. [2021-06-05 05:53:44,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:53:44,154 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:44,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:44,189 INFO L225 Difference]: With dead ends: 26041 [2021-06-05 05:53:44,190 INFO L226 Difference]: Without dead ends: 25673 [2021-06-05 05:53:44,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 846 ImplicationChecksByTransitivity, 1619.9ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:53:44,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25673 states. [2021-06-05 05:53:44,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25673 to 22235. [2021-06-05 05:53:44,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22235 states, 22234 states have (on average 3.0134028964648736) internal successors, (67000), 22234 states have internal predecessors, (67000), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22235 states to 22235 states and 67000 transitions. [2021-06-05 05:53:44,565 INFO L78 Accepts]: Start accepts. Automaton has 22235 states and 67000 transitions. Word has length 54 [2021-06-05 05:53:44,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:44,565 INFO L482 AbstractCegarLoop]: Abstraction has 22235 states and 67000 transitions. [2021-06-05 05:53:44,565 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:44,565 INFO L276 IsEmpty]: Start isEmpty. Operand 22235 states and 67000 transitions. [2021-06-05 05:53:44,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:44,587 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:44,587 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:44,787 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-06-05 05:53:44,788 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:44,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:44,788 INFO L82 PathProgramCache]: Analyzing trace with hash 1950477839, now seen corresponding path program 146 times [2021-06-05 05:53:44,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:44,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [389881702] [2021-06-05 05:53:44,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:44,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:45,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [389881702] [2021-06-05 05:53:45,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [389881702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:45,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644879571] [2021-06-05 05:53:45,148 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:45,180 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:53:45,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:45,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:53:45,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:45,528 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:45,529 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:45,531 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 05:53:45,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:45,543 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 05:53:45,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 05:53:45,678 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:45,678 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 05:53:45,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:45,684 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:45,684 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 05:53:45,684 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:53:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:45,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644879571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:45,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:45,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-06-05 05:53:45,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784623397] [2021-06-05 05:53:45,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:53:45,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:45,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:53:45,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:45,835 INFO L87 Difference]: Start difference. First operand 22235 states and 67000 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:48,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:48,537 INFO L93 Difference]: Finished difference Result 25981 states and 77167 transitions. [2021-06-05 05:53:48,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:53:48,538 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:48,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:48,573 INFO L225 Difference]: With dead ends: 25981 [2021-06-05 05:53:48,574 INFO L226 Difference]: Without dead ends: 25586 [2021-06-05 05:53:48,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1162 ImplicationChecksByTransitivity, 1922.3ms TimeCoverageRelationStatistics Valid=359, Invalid=4611, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:53:48,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25586 states. [2021-06-05 05:53:48,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25586 to 22228. [2021-06-05 05:53:48,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22228 states, 22227 states have (on average 3.0134970981239033) internal successors, (66981), 22227 states have internal predecessors, (66981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:48,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22228 states to 22228 states and 66981 transitions. [2021-06-05 05:53:48,871 INFO L78 Accepts]: Start accepts. Automaton has 22228 states and 66981 transitions. Word has length 54 [2021-06-05 05:53:48,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:48,872 INFO L482 AbstractCegarLoop]: Abstraction has 22228 states and 66981 transitions. [2021-06-05 05:53:48,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:48,872 INFO L276 IsEmpty]: Start isEmpty. Operand 22228 states and 66981 transitions. [2021-06-05 05:53:48,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:48,895 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:48,895 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:49,095 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:49,095 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:49,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:49,096 INFO L82 PathProgramCache]: Analyzing trace with hash -268714335, now seen corresponding path program 147 times [2021-06-05 05:53:49,096 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:49,096 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792937097] [2021-06-05 05:53:49,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:49,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:49,445 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:49,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:49,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792937097] [2021-06-05 05:53:49,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792937097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:49,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387121320] [2021-06-05 05:53:49,446 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 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:49,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:53:49,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:49,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 05:53:49,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:49,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:53:49,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:53:49,851 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 05:53:49,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:49,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:49,868 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 05:53:49,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 05:53:49,999 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:53:49,999 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 29 treesize of output 13 [2021-06-05 05:53:50,000 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:50,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:50,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:53:50,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:53:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:50,152 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387121320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:50,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:50,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-06-05 05:53:50,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [317586152] [2021-06-05 05:53:50,153 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:53:50,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:50,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:53:50,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:50,153 INFO L87 Difference]: Start difference. First operand 22228 states and 66981 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:52,626 INFO L93 Difference]: Finished difference Result 24634 states and 73545 transitions. [2021-06-05 05:53:52,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:53:52,627 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:52,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:52,659 INFO L225 Difference]: With dead ends: 24634 [2021-06-05 05:53:52,659 INFO L226 Difference]: Without dead ends: 24243 [2021-06-05 05:53:52,660 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 1964.6ms TimeCoverageRelationStatistics Valid=356, Invalid=4756, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:53:52,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24243 states. [2021-06-05 05:53:52,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24243 to 22054. [2021-06-05 05:53:52,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22054 states, 22053 states have (on average 3.017730014057044) internal successors, (66550), 22053 states have internal predecessors, (66550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22054 states to 22054 states and 66550 transitions. [2021-06-05 05:53:52,962 INFO L78 Accepts]: Start accepts. Automaton has 22054 states and 66550 transitions. Word has length 54 [2021-06-05 05:53:52,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:52,962 INFO L482 AbstractCegarLoop]: Abstraction has 22054 states and 66550 transitions. [2021-06-05 05:53:52,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:52,962 INFO L276 IsEmpty]: Start isEmpty. Operand 22054 states and 66550 transitions. [2021-06-05 05:53:52,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:52,984 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:52,984 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:53,185 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2021-06-05 05:53:53,185 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:53,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:53,185 INFO L82 PathProgramCache]: Analyzing trace with hash -1648167537, now seen corresponding path program 148 times [2021-06-05 05:53:53,185 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:53,185 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696866281] [2021-06-05 05:53:53,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:53,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:53,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:53,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696866281] [2021-06-05 05:53:53,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696866281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:53,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031814174] [2021-06-05 05:53:53,634 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:53,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:53:53,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:53,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:53:53,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:53,982 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:53:53,982 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 37 treesize of output 17 [2021-06-05 05:53:53,983 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:53,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:53,991 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 05:53:53,991 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-06-05 05:53:54,060 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:54,060 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 29 treesize of output 13 [2021-06-05 05:53:54,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:54,066 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:54,066 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 05:53:54,066 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:53:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:54,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031814174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:54,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:54,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:53:54,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053167436] [2021-06-05 05:53:54,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:53:54,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:54,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:53:54,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:53:54,211 INFO L87 Difference]: Start difference. First operand 22054 states and 66550 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:53:56,585 INFO L93 Difference]: Finished difference Result 24879 states and 74026 transitions. [2021-06-05 05:53:56,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:53:56,585 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:53:56,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:53:56,617 INFO L225 Difference]: With dead ends: 24879 [2021-06-05 05:53:56,617 INFO L226 Difference]: Without dead ends: 24493 [2021-06-05 05:53:56,618 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 870 ImplicationChecksByTransitivity, 1719.9ms TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:53:56,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24493 states. [2021-06-05 05:53:56,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24493 to 22133. [2021-06-05 05:53:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22133 states, 22132 states have (on average 3.015994939454184) internal successors, (66750), 22132 states have internal predecessors, (66750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22133 states to 22133 states and 66750 transitions. [2021-06-05 05:53:56,911 INFO L78 Accepts]: Start accepts. Automaton has 22133 states and 66750 transitions. Word has length 54 [2021-06-05 05:53:56,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:53:56,911 INFO L482 AbstractCegarLoop]: Abstraction has 22133 states and 66750 transitions. [2021-06-05 05:53:56,912 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:53:56,912 INFO L276 IsEmpty]: Start isEmpty. Operand 22133 states and 66750 transitions. [2021-06-05 05:53:56,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:53:56,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:53:56,933 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:53:57,133 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:57,134 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:53:57,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:53:57,134 INFO L82 PathProgramCache]: Analyzing trace with hash -2121328529, now seen corresponding path program 149 times [2021-06-05 05:53:57,134 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:53:57,134 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780461797] [2021-06-05 05:53:57,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:53:57,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:53:57,635 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:53:57,635 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:53:57,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780461797] [2021-06-05 05:53:57,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780461797] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:57,635 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235411760] [2021-06-05 05:53:57,635 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:53:57,669 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:53:57,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:53:57,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:53:57,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:53:57,949 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:57,949 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 33 treesize of output 17 [2021-06-05 05:53:57,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:57,959 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:57,959 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 05:53:57,959 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:53:58,065 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:53:58,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:53:58,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:53:58,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:53:58,072 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 05:53:58,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 05:53:58,271 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:53:58,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235411760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:53:58,271 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:53:58,271 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:53:58,271 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687941726] [2021-06-05 05:53:58,271 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:53:58,271 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:53:58,272 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:53:58,272 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:53:58,272 INFO L87 Difference]: Start difference. First operand 22133 states and 66750 transitions. Second operand has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:00,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:00,785 INFO L93 Difference]: Finished difference Result 24822 states and 73876 transitions. [2021-06-05 05:54:00,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:54:00,786 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:00,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:00,819 INFO L225 Difference]: With dead ends: 24822 [2021-06-05 05:54:00,819 INFO L226 Difference]: Without dead ends: 24579 [2021-06-05 05:54:00,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 965 ImplicationChecksByTransitivity, 1729.0ms TimeCoverageRelationStatistics Valid=289, Invalid=3743, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:54:00,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24579 states. [2021-06-05 05:54:01,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24579 to 22213. [2021-06-05 05:54:01,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22213 states, 22212 states have (on average 3.0139564199531783) internal successors, (66946), 22212 states have internal predecessors, (66946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:01,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22213 states to 22213 states and 66946 transitions. [2021-06-05 05:54:01,185 INFO L78 Accepts]: Start accepts. Automaton has 22213 states and 66946 transitions. Word has length 54 [2021-06-05 05:54:01,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:01,185 INFO L482 AbstractCegarLoop]: Abstraction has 22213 states and 66946 transitions. [2021-06-05 05:54:01,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:01,186 INFO L276 IsEmpty]: Start isEmpty. Operand 22213 states and 66946 transitions. [2021-06-05 05:54:01,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:01,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:01,207 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:01,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:01,407 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:01,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:01,408 INFO L82 PathProgramCache]: Analyzing trace with hash 1453637449, now seen corresponding path program 150 times [2021-06-05 05:54:01,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:01,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925017566] [2021-06-05 05:54:01,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:01,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:01,825 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:01,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:01,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925017566] [2021-06-05 05:54:01,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925017566] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:01,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136835324] [2021-06-05 05:54:01,826 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:01,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:54:01,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:01,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:54:01,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:02,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:02,259 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:02,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 05:54:02,260 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,272 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:02,272 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 05:54:02,273 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:60, output treesize:30 [2021-06-05 05:54:02,381 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:02,381 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 05:54:02,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:02,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:02,387 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 05:54:02,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:54:02,589 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:02,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [136835324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:02,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:02,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-06-05 05:54:02,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441997899] [2021-06-05 05:54:02,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:54:02,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:02,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:54:02,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:54:02,590 INFO L87 Difference]: Start difference. First operand 22213 states and 66946 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:05,452 INFO L93 Difference]: Finished difference Result 23990 states and 71672 transitions. [2021-06-05 05:54:05,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 05:54:05,453 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:05,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:05,484 INFO L225 Difference]: With dead ends: 23990 [2021-06-05 05:54:05,484 INFO L226 Difference]: Without dead ends: 23576 [2021-06-05 05:54:05,484 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 2316.9ms TimeCoverageRelationStatistics Valid=434, Invalid=5886, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 05:54:05,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23576 states. [2021-06-05 05:54:05,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23576 to 22219. [2021-06-05 05:54:05,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22219 states, 22218 states have (on average 3.0147177963813125) internal successors, (66981), 22218 states have internal predecessors, (66981), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22219 states to 22219 states and 66981 transitions. [2021-06-05 05:54:05,760 INFO L78 Accepts]: Start accepts. Automaton has 22219 states and 66981 transitions. Word has length 54 [2021-06-05 05:54:05,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:05,760 INFO L482 AbstractCegarLoop]: Abstraction has 22219 states and 66981 transitions. [2021-06-05 05:54:05,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:05,761 INFO L276 IsEmpty]: Start isEmpty. Operand 22219 states and 66981 transitions. [2021-06-05 05:54:05,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:05,783 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:05,783 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:06,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,155 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:06,005 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:06,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:06,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1270523895, now seen corresponding path program 151 times [2021-06-05 05:54:06,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:06,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779625308] [2021-06-05 05:54:06,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:06,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:06,383 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:06,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779625308] [2021-06-05 05:54:06,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779625308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933043670] [2021-06-05 05:54:06,384 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:06,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:06,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:54:06,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:06,696 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:54:06,696 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 37 treesize of output 17 [2021-06-05 05:54:06,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:06,706 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 05:54:06,706 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-06-05 05:54:06,812 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:06,813 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 05:54:06,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:06,818 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:06,818 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 05:54:06,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:54:06,964 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:06,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1933043670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:06,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:06,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:54:06,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901993303] [2021-06-05 05:54:06,964 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:54:06,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:06,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:54:06,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:54:06,965 INFO L87 Difference]: Start difference. First operand 22219 states and 66981 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:09,254 INFO L93 Difference]: Finished difference Result 25278 states and 75084 transitions. [2021-06-05 05:54:09,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:54:09,255 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:09,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:09,289 INFO L225 Difference]: With dead ends: 25278 [2021-06-05 05:54:09,289 INFO L226 Difference]: Without dead ends: 24897 [2021-06-05 05:54:09,290 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1667.3ms TimeCoverageRelationStatistics Valid=281, Invalid=3751, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:54:09,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24897 states. [2021-06-05 05:54:09,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24897 to 22203. [2021-06-05 05:54:09,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22203 states, 22202 states have (on average 3.0149085667957842) internal successors, (66937), 22202 states have internal predecessors, (66937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22203 states to 22203 states and 66937 transitions. [2021-06-05 05:54:09,577 INFO L78 Accepts]: Start accepts. Automaton has 22203 states and 66937 transitions. Word has length 54 [2021-06-05 05:54:09,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:09,577 INFO L482 AbstractCegarLoop]: Abstraction has 22203 states and 66937 transitions. [2021-06-05 05:54:09,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:09,577 INFO L276 IsEmpty]: Start isEmpty. Operand 22203 states and 66937 transitions. [2021-06-05 05:54:09,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:09,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:09,598 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:09,799 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:09,799 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:09,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:09,799 INFO L82 PathProgramCache]: Analyzing trace with hash 1932396853, now seen corresponding path program 152 times [2021-06-05 05:54:09,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:09,799 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532069447] [2021-06-05 05:54:09,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:09,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:10,246 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:10,246 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:10,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532069447] [2021-06-05 05:54:10,246 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532069447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:10,246 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1974477861] [2021-06-05 05:54:10,246 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:10,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:10,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:10,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:54:10,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:10,525 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:54:10,526 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 35 treesize of output 15 [2021-06-05 05:54:10,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:10,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:10,534 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:10,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-06-05 05:54:10,734 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:10,734 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 05:54:10,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:10,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:10,740 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 05:54:10,740 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:54:10,884 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:10,885 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1974477861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:10,885 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:10,885 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:54:10,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685013126] [2021-06-05 05:54:10,885 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:54:10,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:10,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:54:10,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1373, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:54:10,885 INFO L87 Difference]: Start difference. First operand 22203 states and 66937 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:13,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:13,355 INFO L93 Difference]: Finished difference Result 25251 states and 75012 transitions. [2021-06-05 05:54:13,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:54:13,356 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:13,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:13,390 INFO L225 Difference]: With dead ends: 25251 [2021-06-05 05:54:13,391 INFO L226 Difference]: Without dead ends: 24913 [2021-06-05 05:54:13,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 986 ImplicationChecksByTransitivity, 1750.9ms TimeCoverageRelationStatistics Valid=304, Invalid=3986, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:54:13,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24913 states. [2021-06-05 05:54:13,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24913 to 22215. [2021-06-05 05:54:13,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22215 states, 22214 states have (on average 3.014765463221392) internal successors, (66970), 22214 states have internal predecessors, (66970), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:13,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22215 states to 22215 states and 66970 transitions. [2021-06-05 05:54:13,683 INFO L78 Accepts]: Start accepts. Automaton has 22215 states and 66970 transitions. Word has length 54 [2021-06-05 05:54:13,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:13,683 INFO L482 AbstractCegarLoop]: Abstraction has 22215 states and 66970 transitions. [2021-06-05 05:54:13,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:13,683 INFO L276 IsEmpty]: Start isEmpty. Operand 22215 states and 66970 transitions. [2021-06-05 05:54:13,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:13,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:13,704 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:13,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:13,905 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:13,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:13,905 INFO L82 PathProgramCache]: Analyzing trace with hash 1029281981, now seen corresponding path program 153 times [2021-06-05 05:54:13,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:13,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281913733] [2021-06-05 05:54:13,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:13,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:14,371 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:14,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:14,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281913733] [2021-06-05 05:54:14,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281913733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:14,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341385317] [2021-06-05 05:54:14,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:14,414 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:14,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:14,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:54:14,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:14,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:14,775 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:14,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 05:54:14,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:14,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:14,793 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 05:54:14,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 05:54:14,934 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:14,934 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 05:54:14,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:14,939 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:14,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:14,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:54:15,087 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:15,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341385317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:15,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:15,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 21] total 38 [2021-06-05 05:54:15,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408619129] [2021-06-05 05:54:15,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:54:15,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:15,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:54:15,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1377, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:54:15,089 INFO L87 Difference]: Start difference. First operand 22215 states and 66970 transitions. Second operand has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:18,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:18,336 INFO L93 Difference]: Finished difference Result 23993 states and 71691 transitions. [2021-06-05 05:54:18,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:54:18,336 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:18,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:18,368 INFO L225 Difference]: With dead ends: 23993 [2021-06-05 05:54:18,368 INFO L226 Difference]: Without dead ends: 23628 [2021-06-05 05:54:18,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1527 ImplicationChecksByTransitivity, 2411.0ms TimeCoverageRelationStatistics Valid=423, Invalid=5739, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:54:18,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23628 states. [2021-06-05 05:54:18,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23628 to 22227. [2021-06-05 05:54:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22227 states, 22226 states have (on average 3.0142625753621886) internal successors, (66995), 22226 states have internal predecessors, (66995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22227 states to 22227 states and 66995 transitions. [2021-06-05 05:54:18,722 INFO L78 Accepts]: Start accepts. Automaton has 22227 states and 66995 transitions. Word has length 54 [2021-06-05 05:54:18,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:18,722 INFO L482 AbstractCegarLoop]: Abstraction has 22227 states and 66995 transitions. [2021-06-05 05:54:18,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 38 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:18,723 INFO L276 IsEmpty]: Start isEmpty. Operand 22227 states and 66995 transitions. [2021-06-05 05:54:18,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:18,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:18,743 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:18,944 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:18,944 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:18,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:18,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1189910193, now seen corresponding path program 154 times [2021-06-05 05:54:18,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:18,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966209048] [2021-06-05 05:54:18,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:18,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:19,303 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:19,303 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:19,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966209048] [2021-06-05 05:54:19,303 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966209048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:19,303 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769538312] [2021-06-05 05:54:19,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:19,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:19,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:19,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:54:19,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:19,581 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:54:19,581 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 37 treesize of output 17 [2021-06-05 05:54:19,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:19,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:19,589 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:19,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:25 [2021-06-05 05:54:19,723 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:19,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:54:19,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:19,729 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:19,729 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 05:54:19,729 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:54:19,876 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:19,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769538312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:19,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:19,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:54:19,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1771651273] [2021-06-05 05:54:19,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:54:19,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:19,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:54:19,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:54:19,877 INFO L87 Difference]: Start difference. First operand 22227 states and 66995 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:22,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:22,331 INFO L93 Difference]: Finished difference Result 24960 states and 74221 transitions. [2021-06-05 05:54:22,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:54:22,331 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:22,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:22,365 INFO L225 Difference]: With dead ends: 24960 [2021-06-05 05:54:22,365 INFO L226 Difference]: Without dead ends: 24599 [2021-06-05 05:54:22,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 1733.8ms TimeCoverageRelationStatistics Valid=299, Invalid=4123, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:54:22,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24599 states. [2021-06-05 05:54:22,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24599 to 22155. [2021-06-05 05:54:22,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22155 states, 22154 states have (on average 3.0162047485781347) internal successors, (66821), 22154 states have internal predecessors, (66821), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:22,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22155 states to 22155 states and 66821 transitions. [2021-06-05 05:54:22,659 INFO L78 Accepts]: Start accepts. Automaton has 22155 states and 66821 transitions. Word has length 54 [2021-06-05 05:54:22,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:22,659 INFO L482 AbstractCegarLoop]: Abstraction has 22155 states and 66821 transitions. [2021-06-05 05:54:22,659 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:22,659 INFO L276 IsEmpty]: Start isEmpty. Operand 22155 states and 66821 transitions. [2021-06-05 05:54:22,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:22,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:22,680 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:22,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-06-05 05:54:22,881 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:22,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:22,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1389100985, now seen corresponding path program 155 times [2021-06-05 05:54:22,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:22,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850600148] [2021-06-05 05:54:22,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:22,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:23,329 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:23,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850600148] [2021-06-05 05:54:23,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850600148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:23,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861617803] [2021-06-05 05:54:23,329 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:23,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:54:23,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:23,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:54:23,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:23,778 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:23,778 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 33 treesize of output 17 [2021-06-05 05:54:23,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:23,786 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 05:54:23,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:54:23,858 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:23,858 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 05:54:23,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:23,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:23,865 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 05:54:23,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 05:54:24,067 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:24,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861617803] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:24,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:24,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 41 [2021-06-05 05:54:24,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606785726] [2021-06-05 05:54:24,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:54:24,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:24,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:54:24,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1594, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:54:24,068 INFO L87 Difference]: Start difference. First operand 22155 states and 66821 transitions. Second operand has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:26,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:26,995 INFO L93 Difference]: Finished difference Result 26034 states and 77414 transitions. [2021-06-05 05:54:26,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:54:26,995 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:26,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:27,032 INFO L225 Difference]: With dead ends: 26034 [2021-06-05 05:54:27,032 INFO L226 Difference]: Without dead ends: 25791 [2021-06-05 05:54:27,033 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 1836.4ms TimeCoverageRelationStatistics Valid=331, Invalid=4225, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:54:27,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25791 states. [2021-06-05 05:54:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25791 to 22355. [2021-06-05 05:54:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22355 states, 22354 states have (on average 3.0127046613581463) internal successors, (67346), 22354 states have internal predecessors, (67346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:27,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22355 states to 22355 states and 67346 transitions. [2021-06-05 05:54:27,335 INFO L78 Accepts]: Start accepts. Automaton has 22355 states and 67346 transitions. Word has length 54 [2021-06-05 05:54:27,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:27,335 INFO L482 AbstractCegarLoop]: Abstraction has 22355 states and 67346 transitions. [2021-06-05 05:54:27,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.238095238095238) internal successors, (94), 41 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:27,335 INFO L276 IsEmpty]: Start isEmpty. Operand 22355 states and 67346 transitions. [2021-06-05 05:54:27,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:27,356 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:27,356 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:27,556 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2021-06-05 05:54:27,557 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:27,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:27,557 INFO L82 PathProgramCache]: Analyzing trace with hash 669099667, now seen corresponding path program 156 times [2021-06-05 05:54:27,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:27,557 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465638122] [2021-06-05 05:54:27,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:27,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:28,021 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:28,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:28,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465638122] [2021-06-05 05:54:28,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465638122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:28,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747010875] [2021-06-05 05:54:28,021 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:28,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:54:28,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:28,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:54:28,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:28,381 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:28,382 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 33 treesize of output 17 [2021-06-05 05:54:28,382 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,390 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:28,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,390 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 05:54:28,472 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:54:28,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:54:28,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 05:54:28,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:28,482 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:28,482 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 05:54:28,483 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-05 05:54:28,638 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:28,638 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747010875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:28,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:28,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:28,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784884193] [2021-06-05 05:54:28,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:28,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:28,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:28,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1308, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:28,639 INFO L87 Difference]: Start difference. First operand 22355 states and 67346 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:31,338 INFO L93 Difference]: Finished difference Result 25904 states and 77087 transitions. [2021-06-05 05:54:31,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:54:31,339 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:31,374 INFO L225 Difference]: With dead ends: 25904 [2021-06-05 05:54:31,375 INFO L226 Difference]: Without dead ends: 25731 [2021-06-05 05:54:31,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 752 ImplicationChecksByTransitivity, 1907.0ms TimeCoverageRelationStatistics Valid=298, Invalid=3734, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:54:31,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25731 states. [2021-06-05 05:54:31,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25731 to 22348. [2021-06-05 05:54:31,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22348 states, 22347 states have (on average 3.012663892245044) internal successors, (67324), 22347 states have internal predecessors, (67324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:31,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22348 states to 22348 states and 67324 transitions. [2021-06-05 05:54:31,672 INFO L78 Accepts]: Start accepts. Automaton has 22348 states and 67324 transitions. Word has length 54 [2021-06-05 05:54:31,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:31,672 INFO L482 AbstractCegarLoop]: Abstraction has 22348 states and 67324 transitions. [2021-06-05 05:54:31,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:31,672 INFO L276 IsEmpty]: Start isEmpty. Operand 22348 states and 67324 transitions. [2021-06-05 05:54:31,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:31,693 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:31,693 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:31,894 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 05:54:31,894 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:31,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:31,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1807624031, now seen corresponding path program 157 times [2021-06-05 05:54:31,894 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:31,894 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398675682] [2021-06-05 05:54:31,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:31,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:32,368 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:32,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:32,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398675682] [2021-06-05 05:54:32,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398675682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:32,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552024053] [2021-06-05 05:54:32,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:32,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:54:32,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:32,727 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:54:32,727 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 37 treesize of output 17 [2021-06-05 05:54:32,728 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:32,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:32,736 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 05:54:32,736 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 05:54:32,814 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:54:32,815 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 29 treesize of output 13 [2021-06-05 05:54:32,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:32,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:32,820 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:32,820 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-06-05 05:54:32,962 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:32,962 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1552024053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:32,962 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:32,962 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:54:32,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623351132] [2021-06-05 05:54:32,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:54:32,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:32,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:54:32,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:54:32,963 INFO L87 Difference]: Start difference. First operand 22348 states and 67324 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:35,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:35,532 INFO L93 Difference]: Finished difference Result 25989 states and 77296 transitions. [2021-06-05 05:54:35,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:54:35,533 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:35,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:35,567 INFO L225 Difference]: With dead ends: 25989 [2021-06-05 05:54:35,568 INFO L226 Difference]: Without dead ends: 25679 [2021-06-05 05:54:35,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 1877.7ms TimeCoverageRelationStatistics Valid=286, Invalid=3620, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:54:35,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25679 states. [2021-06-05 05:54:35,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25679 to 22231. [2021-06-05 05:54:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22231 states, 22230 states have (on average 3.015249662618084) internal successors, (67029), 22230 states have internal predecessors, (67029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:35,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22231 states to 22231 states and 67029 transitions. [2021-06-05 05:54:35,869 INFO L78 Accepts]: Start accepts. Automaton has 22231 states and 67029 transitions. Word has length 54 [2021-06-05 05:54:35,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:35,869 INFO L482 AbstractCegarLoop]: Abstraction has 22231 states and 67029 transitions. [2021-06-05 05:54:35,869 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:35,869 INFO L276 IsEmpty]: Start isEmpty. Operand 22231 states and 67029 transitions. [2021-06-05 05:54:35,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:35,891 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:35,892 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:36,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:36,093 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:36,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:36,093 INFO L82 PathProgramCache]: Analyzing trace with hash 915939993, now seen corresponding path program 158 times [2021-06-05 05:54:36,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:36,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122493565] [2021-06-05 05:54:36,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:36,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:36,498 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:36,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:36,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122493565] [2021-06-05 05:54:36,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122493565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:36,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752651737] [2021-06-05 05:54:36,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:36,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:54:36,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:36,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:54:36,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:36,824 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:54:36,824 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 37 treesize of output 17 [2021-06-05 05:54:36,825 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:36,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:36,838 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 05:54:36,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-06-05 05:54:36,987 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:36,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:54:36,988 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:36,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:36,995 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 05:54:36,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:54:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:37,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752651737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:37,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:37,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:54:37,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972519770] [2021-06-05 05:54:37,152 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:54:37,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:37,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:54:37,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:54:37,152 INFO L87 Difference]: Start difference. First operand 22231 states and 67029 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:39,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:39,923 INFO L93 Difference]: Finished difference Result 26270 states and 78044 transitions. [2021-06-05 05:54:39,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:54:39,924 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:39,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:39,960 INFO L225 Difference]: With dead ends: 26270 [2021-06-05 05:54:39,960 INFO L226 Difference]: Without dead ends: 25932 [2021-06-05 05:54:39,960 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 812 ImplicationChecksByTransitivity, 1790.3ms TimeCoverageRelationStatistics Valid=288, Invalid=3744, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:54:39,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25932 states. [2021-06-05 05:54:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25932 to 22235. [2021-06-05 05:54:40,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22235 states, 22234 states have (on average 3.0150220383196906) internal successors, (67036), 22234 states have internal predecessors, (67036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22235 states to 22235 states and 67036 transitions. [2021-06-05 05:54:40,260 INFO L78 Accepts]: Start accepts. Automaton has 22235 states and 67036 transitions. Word has length 54 [2021-06-05 05:54:40,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:40,260 INFO L482 AbstractCegarLoop]: Abstraction has 22235 states and 67036 transitions. [2021-06-05 05:54:40,260 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:40,260 INFO L276 IsEmpty]: Start isEmpty. Operand 22235 states and 67036 transitions. [2021-06-05 05:54:40,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:40,282 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:40,282 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:40,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,163 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:40,482 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:40,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:40,483 INFO L82 PathProgramCache]: Analyzing trace with hash 12825121, now seen corresponding path program 159 times [2021-06-05 05:54:40,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:40,483 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162471397] [2021-06-05 05:54:40,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:40,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:40,871 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:40,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:40,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162471397] [2021-06-05 05:54:40,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162471397] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:40,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [372412466] [2021-06-05 05:54:40,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:40,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:54:40,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:40,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:54:40,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:41,196 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:41,197 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 33 treesize of output 17 [2021-06-05 05:54:41,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:41,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:41,206 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 05:54:41,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:54:41,315 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:41,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:54:41,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:41,321 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:41,321 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 05:54:41,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:54:41,473 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:41,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [372412466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:41,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:41,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:54:41,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887859747] [2021-06-05 05:54:41,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:54:41,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:41,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:54:41,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:54:41,474 INFO L87 Difference]: Start difference. First operand 22235 states and 67036 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:44,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:44,358 INFO L93 Difference]: Finished difference Result 26381 states and 78335 transitions. [2021-06-05 05:54:44,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:54:44,358 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:44,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:44,396 INFO L225 Difference]: With dead ends: 26381 [2021-06-05 05:54:44,396 INFO L226 Difference]: Without dead ends: 26000 [2021-06-05 05:54:44,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 818 ImplicationChecksByTransitivity, 1812.4ms TimeCoverageRelationStatistics Valid=289, Invalid=3871, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:54:44,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26000 states. [2021-06-05 05:54:44,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26000 to 22215. [2021-06-05 05:54:44,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22215 states, 22214 states have (on average 3.0154407130638337) internal successors, (66985), 22214 states have internal predecessors, (66985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:44,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22215 states to 22215 states and 66985 transitions. [2021-06-05 05:54:44,701 INFO L78 Accepts]: Start accepts. Automaton has 22215 states and 66985 transitions. Word has length 54 [2021-06-05 05:54:44,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:44,702 INFO L482 AbstractCegarLoop]: Abstraction has 22215 states and 66985 transitions. [2021-06-05 05:54:44,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 22215 states and 66985 transitions. [2021-06-05 05:54:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:44,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:44,724 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:44,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 05:54:44,925 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:44,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:44,925 INFO L82 PathProgramCache]: Analyzing trace with hash -1190246013, now seen corresponding path program 160 times [2021-06-05 05:54:44,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:44,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553289094] [2021-06-05 05:54:44,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:44,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:45,333 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:45,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:45,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553289094] [2021-06-05 05:54:45,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553289094] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:45,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984760611] [2021-06-05 05:54:45,333 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:45,365 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:54:45,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:45,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:54:45,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:45,611 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:54:45,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 35 treesize of output 15 [2021-06-05 05:54:45,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:45,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:45,620 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 05:54:45,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-06-05 05:54:45,758 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:45,759 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 29 treesize of output 13 [2021-06-05 05:54:45,759 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:45,764 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:45,764 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 05:54:45,765 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:54:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:45,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984760611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:45,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:45,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:54:45,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655513883] [2021-06-05 05:54:45,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:54:45,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:45,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:54:45,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:54:45,913 INFO L87 Difference]: Start difference. First operand 22215 states and 66985 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:48,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:48,405 INFO L93 Difference]: Finished difference Result 26271 states and 78046 transitions. [2021-06-05 05:54:48,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:54:48,405 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:48,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:48,444 INFO L225 Difference]: With dead ends: 26271 [2021-06-05 05:54:48,444 INFO L226 Difference]: Without dead ends: 25933 [2021-06-05 05:54:48,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 883 ImplicationChecksByTransitivity, 1772.0ms TimeCoverageRelationStatistics Valid=299, Invalid=3861, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:54:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25933 states. [2021-06-05 05:54:48,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25933 to 22231. [2021-06-05 05:54:48,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22231 states, 22230 states have (on average 3.0150697255960415) internal successors, (67025), 22230 states have internal predecessors, (67025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:48,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22231 states to 22231 states and 67025 transitions. [2021-06-05 05:54:48,747 INFO L78 Accepts]: Start accepts. Automaton has 22231 states and 67025 transitions. Word has length 54 [2021-06-05 05:54:48,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:48,747 INFO L482 AbstractCegarLoop]: Abstraction has 22231 states and 67025 transitions. [2021-06-05 05:54:48,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:48,747 INFO L276 IsEmpty]: Start isEmpty. Operand 22231 states and 67025 transitions. [2021-06-05 05:54:48,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:48,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:48,769 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:48,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:48,969 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:48,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:48,970 INFO L82 PathProgramCache]: Analyzing trace with hash -2093360885, now seen corresponding path program 161 times [2021-06-05 05:54:48,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:48,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808550554] [2021-06-05 05:54:48,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:48,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:49,366 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:49,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:49,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808550554] [2021-06-05 05:54:49,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808550554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:49,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709947691] [2021-06-05 05:54:49,367 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:49,401 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:54:49,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:49,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:54:49,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:49,649 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:49,650 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 31 treesize of output 15 [2021-06-05 05:54:49,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:49,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:49,658 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 05:54:49,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:54:49,797 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:49,798 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 05:54:49,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:49,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:49,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:49,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 05:54:50,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:50,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709947691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:50,008 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:50,008 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:54:50,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543418284] [2021-06-05 05:54:50,008 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:54:50,008 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:50,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:54:50,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:54:50,009 INFO L87 Difference]: Start difference. First operand 22231 states and 67025 transitions. Second operand has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:52,734 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:52,734 INFO L93 Difference]: Finished difference Result 26033 states and 77415 transitions. [2021-06-05 05:54:52,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:54:52,735 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:52,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:52,773 INFO L225 Difference]: With dead ends: 26033 [2021-06-05 05:54:52,773 INFO L226 Difference]: Without dead ends: 25790 [2021-06-05 05:54:52,774 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1824.5ms TimeCoverageRelationStatistics Valid=308, Invalid=3982, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:54:52,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25790 states. [2021-06-05 05:54:53,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25790 to 22311. [2021-06-05 05:54:53,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22311 states, 22310 states have (on average 3.01317794710892) internal successors, (67224), 22310 states have internal predecessors, (67224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22311 states to 22311 states and 67224 transitions. [2021-06-05 05:54:53,073 INFO L78 Accepts]: Start accepts. Automaton has 22311 states and 67224 transitions. Word has length 54 [2021-06-05 05:54:53,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:53,074 INFO L482 AbstractCegarLoop]: Abstraction has 22311 states and 67224 transitions. [2021-06-05 05:54:53,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.41025641025641) internal successors, (94), 38 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 22311 states and 67224 transitions. [2021-06-05 05:54:53,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:53,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:53,097 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:53,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:53,297 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:53,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:53,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1481605093, now seen corresponding path program 162 times [2021-06-05 05:54:53,297 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:53,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812088684] [2021-06-05 05:54:53,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:53,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:53,678 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:53,678 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:53,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812088684] [2021-06-05 05:54:53,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812088684] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:53,678 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504215902] [2021-06-05 05:54:53,678 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:53,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:54:53,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:54:53,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:54:53,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:53,961 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:53,961 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 33 treesize of output 17 [2021-06-05 05:54:53,962 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:53,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:53,970 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 05:54:53,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:54:54,108 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:54,108 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 05:54:54,109 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:54,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:54,114 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 05:54:54,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:54:54,321 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:54:54,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504215902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:54,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:54,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:54:54,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865838335] [2021-06-05 05:54:54,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:54:54,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:54,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:54:54,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:54:54,322 INFO L87 Difference]: Start difference. First operand 22311 states and 67224 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:56,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:54:56,890 INFO L93 Difference]: Finished difference Result 26303 states and 78125 transitions. [2021-06-05 05:54:56,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:54:56,890 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:54:56,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:54:56,928 INFO L225 Difference]: With dead ends: 26303 [2021-06-05 05:54:56,929 INFO L226 Difference]: Without dead ends: 25986 [2021-06-05 05:54:56,929 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1054 ImplicationChecksByTransitivity, 1866.1ms TimeCoverageRelationStatistics Valid=327, Invalid=4365, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:54:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25986 states. [2021-06-05 05:54:57,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25986 to 22227. [2021-06-05 05:54:57,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22227 states, 22226 states have (on average 3.0151174300368937) internal successors, (67014), 22226 states have internal predecessors, (67014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:57,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22227 states to 22227 states and 67014 transitions. [2021-06-05 05:54:57,239 INFO L78 Accepts]: Start accepts. Automaton has 22227 states and 67014 transitions. Word has length 54 [2021-06-05 05:54:57,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:54:57,239 INFO L482 AbstractCegarLoop]: Abstraction has 22227 states and 67014 transitions. [2021-06-05 05:54:57,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:54:57,239 INFO L276 IsEmpty]: Start isEmpty. Operand 22227 states and 67014 transitions. [2021-06-05 05:54:57,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:54:57,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:54:57,262 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:54:57,462 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:57,462 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:54:57,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:54:57,463 INFO L82 PathProgramCache]: Analyzing trace with hash -17585763, now seen corresponding path program 163 times [2021-06-05 05:54:57,463 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:54:57,463 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612015149] [2021-06-05 05:54:57,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:54:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:57,834 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:57,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:54:57,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612015149] [2021-06-05 05:54:57,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612015149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:57,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205625299] [2021-06-05 05:54:57,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:54:57,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:54:57,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:54:57,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:54:58,112 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:54:58,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 05:54:58,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:58,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:58,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:54:58,120 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:25 [2021-06-05 05:54:58,258 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:54:58,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 05:54:58,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:54:58,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:54:58,264 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 05:54:58,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 05:54:58,414 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:54:58,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205625299] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:54:58,414 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:54:58,414 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:54:58,414 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078795015] [2021-06-05 05:54:58,414 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:54:58,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:54:58,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:54:58,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:54:58,415 INFO L87 Difference]: Start difference. First operand 22227 states and 67014 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:01,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:01,300 INFO L93 Difference]: Finished difference Result 26023 states and 77366 transitions. [2021-06-05 05:55:01,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:55:01,300 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:01,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:01,337 INFO L225 Difference]: With dead ends: 26023 [2021-06-05 05:55:01,337 INFO L226 Difference]: Without dead ends: 25662 [2021-06-05 05:55:01,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 1821.9ms TimeCoverageRelationStatistics Valid=299, Invalid=4123, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:55:01,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25662 states. [2021-06-05 05:55:01,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25662 to 22167. [2021-06-05 05:55:01,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22167 states, 22166 states have (on average 3.0167373454840747) internal successors, (66869), 22166 states have internal predecessors, (66869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:01,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22167 states to 22167 states and 66869 transitions. [2021-06-05 05:55:01,639 INFO L78 Accepts]: Start accepts. Automaton has 22167 states and 66869 transitions. Word has length 54 [2021-06-05 05:55:01,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:01,639 INFO L482 AbstractCegarLoop]: Abstraction has 22167 states and 66869 transitions. [2021-06-05 05:55:01,639 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:01,639 INFO L276 IsEmpty]: Start isEmpty. Operand 22167 states and 66869 transitions. [2021-06-05 05:55:01,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:01,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:01,660 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:01,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:01,861 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:01,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:01,861 INFO L82 PathProgramCache]: Analyzing trace with hash 911094525, now seen corresponding path program 164 times [2021-06-05 05:55:01,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:01,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839028469] [2021-06-05 05:55:01,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:01,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:02,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:02,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839028469] [2021-06-05 05:55:02,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839028469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:02,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717404660] [2021-06-05 05:55:02,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:02,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:02,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:02,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:55:02,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:02,747 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:55:02,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 05:55:02,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:02,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:02,756 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 05:55:02,756 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:27 [2021-06-05 05:55:02,827 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:02,827 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 05:55:02,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:02,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:02,833 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 05:55:02,833 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:55:02,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:02,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717404660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:02,982 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:02,982 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:02,983 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424210574] [2021-06-05 05:55:02,983 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:02,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:02,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:02,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:02,983 INFO L87 Difference]: Start difference. First operand 22167 states and 66869 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:05,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:05,596 INFO L93 Difference]: Finished difference Result 25907 states and 77083 transitions. [2021-06-05 05:55:05,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:55:05,596 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:05,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:05,636 INFO L225 Difference]: With dead ends: 25907 [2021-06-05 05:55:05,636 INFO L226 Difference]: Without dead ends: 25521 [2021-06-05 05:55:05,637 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1900.3ms TimeCoverageRelationStatistics Valid=300, Invalid=3860, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:55:05,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25521 states. [2021-06-05 05:55:05,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25521 to 22187. [2021-06-05 05:55:05,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22187 states, 22186 states have (on average 3.016001081763274) internal successors, (66913), 22186 states have internal predecessors, (66913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:05,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22187 states to 22187 states and 66913 transitions. [2021-06-05 05:55:05,955 INFO L78 Accepts]: Start accepts. Automaton has 22187 states and 66913 transitions. Word has length 54 [2021-06-05 05:55:05,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:05,955 INFO L482 AbstractCegarLoop]: Abstraction has 22187 states and 66913 transitions. [2021-06-05 05:55:05,955 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:05,955 INFO L276 IsEmpty]: Start isEmpty. Operand 22187 states and 66913 transitions. [2021-06-05 05:55:05,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:05,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:05,977 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:06,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-06-05 05:55:06,178 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:06,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:06,178 INFO L82 PathProgramCache]: Analyzing trace with hash 437933533, now seen corresponding path program 165 times [2021-06-05 05:55:06,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:06,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191762162] [2021-06-05 05:55:06,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:06,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:06,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:06,616 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:06,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191762162] [2021-06-05 05:55:06,616 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191762162] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:06,616 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017609158] [2021-06-05 05:55:06,616 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:06,648 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:55:06,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:06,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:55:06,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:06,938 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:06,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:55:06,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:06,948 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:06,948 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 05:55:06,948 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:55:07,056 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:07,056 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 05:55:07,057 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:07,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:07,062 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 05:55:07,062 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:55:07,210 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:07,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017609158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:07,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:07,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:55:07,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117954206] [2021-06-05 05:55:07,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:55:07,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:07,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:55:07,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:55:07,211 INFO L87 Difference]: Start difference. First operand 22187 states and 66913 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:09,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:09,842 INFO L93 Difference]: Finished difference Result 26115 states and 77631 transitions. [2021-06-05 05:55:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:55:09,842 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:09,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:09,877 INFO L225 Difference]: With dead ends: 26115 [2021-06-05 05:55:09,877 INFO L226 Difference]: Without dead ends: 25777 [2021-06-05 05:55:09,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 857 ImplicationChecksByTransitivity, 1848.7ms TimeCoverageRelationStatistics Valid=290, Invalid=3742, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:55:09,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25777 states. [2021-06-05 05:55:10,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25777 to 22191. [2021-06-05 05:55:10,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22191 states, 22190 states have (on average 3.0157728706624605) internal successors, (66920), 22190 states have internal predecessors, (66920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:10,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22191 states to 22191 states and 66920 transitions. [2021-06-05 05:55:10,162 INFO L78 Accepts]: Start accepts. Automaton has 22191 states and 66920 transitions. Word has length 54 [2021-06-05 05:55:10,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:10,163 INFO L482 AbstractCegarLoop]: Abstraction has 22191 states and 66920 transitions. [2021-06-05 05:55:10,163 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:10,163 INFO L276 IsEmpty]: Start isEmpty. Operand 22191 states and 66920 transitions. [2021-06-05 05:55:10,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:10,183 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:10,183 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:10,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-06-05 05:55:10,384 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:10,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:10,384 INFO L82 PathProgramCache]: Analyzing trace with hash -465181339, now seen corresponding path program 166 times [2021-06-05 05:55:10,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:10,384 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425358927] [2021-06-05 05:55:10,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:10,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:10,822 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:10,822 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:10,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425358927] [2021-06-05 05:55:10,822 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1425358927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:10,822 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2001592444] [2021-06-05 05:55:10,823 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:10,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:10,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:10,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:55:10,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:11,135 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:55:11,136 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 05:55:11,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:11,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:11,146 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 05:55:11,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:34 [2021-06-05 05:55:11,253 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:11,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:55:11,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:11,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:11,259 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 05:55:11,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:55:11,417 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:11,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2001592444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:11,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:11,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:55:11,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995193139] [2021-06-05 05:55:11,418 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:55:11,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:11,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:55:11,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:55:11,418 INFO L87 Difference]: Start difference. First operand 22191 states and 66920 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:14,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:14,334 INFO L93 Difference]: Finished difference Result 26198 states and 77847 transitions. [2021-06-05 05:55:14,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:55:14,335 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:14,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:14,372 INFO L225 Difference]: With dead ends: 26198 [2021-06-05 05:55:14,372 INFO L226 Difference]: Without dead ends: 25817 [2021-06-05 05:55:14,373 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 864 ImplicationChecksByTransitivity, 1861.1ms TimeCoverageRelationStatistics Valid=291, Invalid=3869, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:55:14,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25817 states. [2021-06-05 05:55:14,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25817 to 22171. [2021-06-05 05:55:14,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22171 states, 22170 states have (on average 3.0167343256653134) internal successors, (66881), 22170 states have internal predecessors, (66881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:14,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22171 states to 22171 states and 66881 transitions. [2021-06-05 05:55:14,674 INFO L78 Accepts]: Start accepts. Automaton has 22171 states and 66881 transitions. Word has length 54 [2021-06-05 05:55:14,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:14,674 INFO L482 AbstractCegarLoop]: Abstraction has 22171 states and 66881 transitions. [2021-06-05 05:55:14,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:14,674 INFO L276 IsEmpty]: Start isEmpty. Operand 22171 states and 66881 transitions. [2021-06-05 05:55:14,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:14,695 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:14,695 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:14,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 05:55:14,896 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:14,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:14,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1574106727, now seen corresponding path program 167 times [2021-06-05 05:55:14,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:14,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106195697] [2021-06-05 05:55:14,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:14,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:15,516 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:15,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:15,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106195697] [2021-06-05 05:55:15,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106195697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:15,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852037725] [2021-06-05 05:55:15,517 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:15,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:55:15,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:15,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 51 conjunts are in the unsatisfiable core [2021-06-05 05:55:15,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:15,991 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:15,992 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:55:15,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:16,000 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:16,000 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 05:55:16,000 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:55:16,094 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:16,094 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:16,095 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:16,095 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:16,096 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:55:16,097 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:16,104 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:16,105 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 05:55:16,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-06-05 05:55:16,337 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:16,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852037725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:16,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:16,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 44 [2021-06-05 05:55:16,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483771906] [2021-06-05 05:55:16,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 45 states [2021-06-05 05:55:16,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:16,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-06-05 05:55:16,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=1854, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 05:55:16,338 INFO L87 Difference]: Start difference. First operand 22171 states and 66881 transitions. Second operand has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:19,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:19,701 INFO L93 Difference]: Finished difference Result 26673 states and 79409 transitions. [2021-06-05 05:55:19,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:55:19,701 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:19,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:19,740 INFO L225 Difference]: With dead ends: 26673 [2021-06-05 05:55:19,740 INFO L226 Difference]: Without dead ends: 26452 [2021-06-05 05:55:19,741 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 2664.0ms TimeCoverageRelationStatistics Valid=399, Invalid=5763, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:55:19,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26452 states. [2021-06-05 05:55:19,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26452 to 22300. [2021-06-05 05:55:20,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22300 states, 22299 states have (on average 3.0137674335171982) internal successors, (67204), 22299 states have internal predecessors, (67204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:20,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22300 states to 22300 states and 67204 transitions. [2021-06-05 05:55:20,063 INFO L78 Accepts]: Start accepts. Automaton has 22300 states and 67204 transitions. Word has length 54 [2021-06-05 05:55:20,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:20,063 INFO L482 AbstractCegarLoop]: Abstraction has 22300 states and 67204 transitions. [2021-06-05 05:55:20,063 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 45 states, 45 states have (on average 2.2888888888888888) internal successors, (103), 44 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:20,063 INFO L276 IsEmpty]: Start isEmpty. Operand 22300 states and 67204 transitions. [2021-06-05 05:55:20,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:20,084 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:20,084 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:20,286 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:20,286 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:20,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:20,286 INFO L82 PathProgramCache]: Analyzing trace with hash -1155583681, now seen corresponding path program 168 times [2021-06-05 05:55:20,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:20,287 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185527011] [2021-06-05 05:55:20,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:20,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:20,753 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:20,753 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:20,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185527011] [2021-06-05 05:55:20,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185527011] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:20,753 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514281716] [2021-06-05 05:55:20,753 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:20,785 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:55:20,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:20,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 46 conjunts are in the unsatisfiable core [2021-06-05 05:55:20,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:21,107 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:21,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:55:21,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:21,116 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:21,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:21,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:55:21,195 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:21,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 05:55:21,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:21,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:21,201 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 05:55:21,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 05:55:21,341 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:55:21,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514281716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:21,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:21,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:21,342 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430924727] [2021-06-05 05:55:21,342 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:21,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:21,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:21,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:21,342 INFO L87 Difference]: Start difference. First operand 22300 states and 67204 transitions. Second operand has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:24,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:24,076 INFO L93 Difference]: Finished difference Result 26696 states and 79459 transitions. [2021-06-05 05:55:24,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:55:24,077 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:24,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:24,115 INFO L225 Difference]: With dead ends: 26696 [2021-06-05 05:55:24,115 INFO L226 Difference]: Without dead ends: 26386 [2021-06-05 05:55:24,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 886 ImplicationChecksByTransitivity, 1825.7ms TimeCoverageRelationStatistics Valid=294, Invalid=3738, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:55:24,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26386 states. [2021-06-05 05:55:24,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26386 to 22183. [2021-06-05 05:55:24,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22183 states, 22182 states have (on average 3.016544946352899) internal successors, (66913), 22182 states have internal predecessors, (66913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:24,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22183 states to 22183 states and 66913 transitions. [2021-06-05 05:55:24,476 INFO L78 Accepts]: Start accepts. Automaton has 22183 states and 66913 transitions. Word has length 54 [2021-06-05 05:55:24,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:24,476 INFO L482 AbstractCegarLoop]: Abstraction has 22183 states and 66913 transitions. [2021-06-05 05:55:24,476 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.526315789473684) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:24,477 INFO L276 IsEmpty]: Start isEmpty. Operand 22183 states and 66913 transitions. [2021-06-05 05:55:24,505 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:24,505 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:24,505 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:24,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 05:55:24,718 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:24,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:24,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1674370965, now seen corresponding path program 169 times [2021-06-05 05:55:24,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:24,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639634428] [2021-06-05 05:55:24,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:24,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:25,293 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:25,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:25,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639634428] [2021-06-05 05:55:25,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639634428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:25,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407093142] [2021-06-05 05:55:25,294 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:25,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:25,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:55:25,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:25,618 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:25,619 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 33 treesize of output 17 [2021-06-05 05:55:25,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:25,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:25,628 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 05:55:25,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 05:55:25,739 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:25,739 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 29 treesize of output 13 [2021-06-05 05:55:25,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:25,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:25,745 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 05:55:25,745 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:55:25,900 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:25,900 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407093142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:25,900 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:25,900 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:25,900 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999883326] [2021-06-05 05:55:25,900 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:25,900 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:25,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:25,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:25,901 INFO L87 Difference]: Start difference. First operand 22183 states and 66913 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:29,541 INFO L93 Difference]: Finished difference Result 27393 states and 81302 transitions. [2021-06-05 05:55:29,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-06-05 05:55:29,542 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:29,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:29,583 INFO L225 Difference]: With dead ends: 27393 [2021-06-05 05:55:29,583 INFO L226 Difference]: Without dead ends: 26835 [2021-06-05 05:55:29,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 2615.4ms TimeCoverageRelationStatistics Valid=447, Invalid=6195, Unknown=0, NotChecked=0, Total=6642 [2021-06-05 05:55:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26835 states. [2021-06-05 05:55:29,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26835 to 22290. [2021-06-05 05:55:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22290 states, 22289 states have (on average 3.014536318363318) internal successors, (67191), 22289 states have internal predecessors, (67191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22290 states to 22290 states and 67191 transitions. [2021-06-05 05:55:29,917 INFO L78 Accepts]: Start accepts. Automaton has 22290 states and 67191 transitions. Word has length 54 [2021-06-05 05:55:29,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:29,917 INFO L482 AbstractCegarLoop]: Abstraction has 22290 states and 67191 transitions. [2021-06-05 05:55:29,917 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:29,917 INFO L276 IsEmpty]: Start isEmpty. Operand 22290 states and 67191 transitions. [2021-06-05 05:55:29,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:29,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:29,941 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:30,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable203,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:30,142 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:30,143 INFO L82 PathProgramCache]: Analyzing trace with hash -605020415, now seen corresponding path program 170 times [2021-06-05 05:55:30,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:30,143 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222615999] [2021-06-05 05:55:30,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:30,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:30,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:30,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222615999] [2021-06-05 05:55:30,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222615999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:30,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1680411810] [2021-06-05 05:55:30,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:30,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:55:30,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:30,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:55:30,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:30,892 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:55:30,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 05:55:30,893 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:30,900 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:30,900 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 05:55:30,901 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:53, output treesize:31 [2021-06-05 05:55:31,005 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:31,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:55:31,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:31,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:31,011 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:31,011 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:55:31,164 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:31,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1680411810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:31,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:31,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:31,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083778759] [2021-06-05 05:55:31,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:31,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:31,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:31,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:31,165 INFO L87 Difference]: Start difference. First operand 22290 states and 67191 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:35,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:35,343 INFO L93 Difference]: Finished difference Result 27933 states and 82783 transitions. [2021-06-05 05:55:35,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-06-05 05:55:35,344 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:35,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:35,383 INFO L225 Difference]: With dead ends: 27933 [2021-06-05 05:55:35,384 INFO L226 Difference]: Without dead ends: 27399 [2021-06-05 05:55:35,384 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1972 ImplicationChecksByTransitivity, 2743.3ms TimeCoverageRelationStatistics Valid=512, Invalid=7320, Unknown=0, NotChecked=0, Total=7832 [2021-06-05 05:55:35,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27399 states. [2021-06-05 05:55:35,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27399 to 22344. [2021-06-05 05:55:35,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22344 states, 22343 states have (on average 3.014948753524594) internal successors, (67363), 22343 states have internal predecessors, (67363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:35,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22344 states to 22344 states and 67363 transitions. [2021-06-05 05:55:35,735 INFO L78 Accepts]: Start accepts. Automaton has 22344 states and 67363 transitions. Word has length 54 [2021-06-05 05:55:35,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:35,736 INFO L482 AbstractCegarLoop]: Abstraction has 22344 states and 67363 transitions. [2021-06-05 05:55:35,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:35,736 INFO L276 IsEmpty]: Start isEmpty. Operand 22344 states and 67363 transitions. [2021-06-05 05:55:35,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:35,759 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:35,759 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:35,959 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2021-06-05 05:55:35,960 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:35,960 INFO L82 PathProgramCache]: Analyzing trace with hash 884895549, now seen corresponding path program 171 times [2021-06-05 05:55:35,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:35,960 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658270757] [2021-06-05 05:55:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:36,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:36,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658270757] [2021-06-05 05:55:36,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658270757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:36,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601378994] [2021-06-05 05:55:36,470 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:36,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:55:36,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:36,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:55:36,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:36,799 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:36,800 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 33 treesize of output 17 [2021-06-05 05:55:36,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:36,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:36,808 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 05:55:36,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:55:36,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:36,887 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:36,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 05:55:36,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:36,895 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:36,896 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 05:55:36,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-05 05:55:37,178 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:37,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601378994] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:37,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:37,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 05:55:37,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386087266] [2021-06-05 05:55:37,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:55:37,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:37,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:55:37,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1449, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:55:37,179 INFO L87 Difference]: Start difference. First operand 22344 states and 67363 transitions. Second operand has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:41,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:41,685 INFO L93 Difference]: Finished difference Result 28464 states and 84507 transitions. [2021-06-05 05:55:41,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-06-05 05:55:41,685 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:41,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:41,726 INFO L225 Difference]: With dead ends: 28464 [2021-06-05 05:55:41,727 INFO L226 Difference]: Without dead ends: 28243 [2021-06-05 05:55:41,727 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 3032.8ms TimeCoverageRelationStatistics Valid=567, Invalid=7805, Unknown=0, NotChecked=0, Total=8372 [2021-06-05 05:55:41,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28243 states. [2021-06-05 05:55:41,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28243 to 22394. [2021-06-05 05:55:42,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22394 states, 22393 states have (on average 3.0132184164694324) internal successors, (67475), 22393 states have internal predecessors, (67475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:42,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22394 states to 22394 states and 67475 transitions. [2021-06-05 05:55:42,064 INFO L78 Accepts]: Start accepts. Automaton has 22394 states and 67475 transitions. Word has length 54 [2021-06-05 05:55:42,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:42,064 INFO L482 AbstractCegarLoop]: Abstraction has 22394 states and 67475 transitions. [2021-06-05 05:55:42,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:42,064 INFO L276 IsEmpty]: Start isEmpty. Operand 22394 states and 67475 transitions. [2021-06-05 05:55:42,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:42,087 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:42,087 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:42,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2021-06-05 05:55:42,288 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:42,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:42,288 INFO L82 PathProgramCache]: Analyzing trace with hash -1815971551, now seen corresponding path program 172 times [2021-06-05 05:55:42,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:42,288 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101270314] [2021-06-05 05:55:42,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:42,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:42,733 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:42,733 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:42,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101270314] [2021-06-05 05:55:42,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101270314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:42,733 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938629533] [2021-06-05 05:55:42,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:42,764 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:55:42,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:42,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:55:42,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:43,072 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:43,072 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 33 treesize of output 17 [2021-06-05 05:55:43,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:43,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:43,081 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 05:55:43,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:31 [2021-06-05 05:55:43,151 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:43,151 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 29 treesize of output 13 [2021-06-05 05:55:43,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:43,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:43,157 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 05:55:43,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:55:43,338 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:43,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1938629533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:43,339 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:43,339 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:55:43,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192850238] [2021-06-05 05:55:43,339 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:43,339 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:43,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:43,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:43,339 INFO L87 Difference]: Start difference. First operand 22394 states and 67475 transitions. Second operand has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:48,412 INFO L93 Difference]: Finished difference Result 29650 states and 87702 transitions. [2021-06-05 05:55:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-06-05 05:55:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:48,454 INFO L225 Difference]: With dead ends: 29650 [2021-06-05 05:55:48,454 INFO L226 Difference]: Without dead ends: 29214 [2021-06-05 05:55:48,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2478 ImplicationChecksByTransitivity, 3141.3ms TimeCoverageRelationStatistics Valid=623, Invalid=8689, Unknown=0, NotChecked=0, Total=9312 [2021-06-05 05:55:48,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29214 states. [2021-06-05 05:55:48,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29214 to 22365. [2021-06-05 05:55:48,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22365 states, 22364 states have (on average 3.013593274906099) internal successors, (67396), 22364 states have internal predecessors, (67396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22365 states to 22365 states and 67396 transitions. [2021-06-05 05:55:48,780 INFO L78 Accepts]: Start accepts. Automaton has 22365 states and 67396 transitions. Word has length 54 [2021-06-05 05:55:48,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:48,780 INFO L482 AbstractCegarLoop]: Abstraction has 22365 states and 67396 transitions. [2021-06-05 05:55:48,780 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.4210526315789473) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:48,780 INFO L276 IsEmpty]: Start isEmpty. Operand 22365 states and 67396 transitions. [2021-06-05 05:55:48,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:48,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:48,802 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:49,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2021-06-05 05:55:49,002 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:49,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:49,003 INFO L82 PathProgramCache]: Analyzing trace with hash 5983179, now seen corresponding path program 173 times [2021-06-05 05:55:49,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:49,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022119543] [2021-06-05 05:55:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:49,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:49,402 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:49,402 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:49,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022119543] [2021-06-05 05:55:49,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022119543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:49,402 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923183363] [2021-06-05 05:55:49,402 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:49,436 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:55:49,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:49,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 05:55:49,437 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:49,753 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:49,753 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 33 treesize of output 17 [2021-06-05 05:55:49,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:49,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:49,763 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 05:55:49,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:55:49,902 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:49,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 05:55:49,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:49,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:49,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:49,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 05:55:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:50,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923183363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:50,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:50,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:55:50,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738161321] [2021-06-05 05:55:50,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:55:50,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:55:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:55:50,054 INFO L87 Difference]: Start difference. First operand 22365 states and 67396 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:54,200 INFO L93 Difference]: Finished difference Result 27191 states and 80450 transitions. [2021-06-05 05:55:54,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-06-05 05:55:54,201 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:54,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:54,239 INFO L225 Difference]: With dead ends: 27191 [2021-06-05 05:55:54,239 INFO L226 Difference]: Without dead ends: 26667 [2021-06-05 05:55:54,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2491 ImplicationChecksByTransitivity, 2743.6ms TimeCoverageRelationStatistics Valid=615, Invalid=8127, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:55:54,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26667 states. [2021-06-05 05:55:54,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26667 to 22522. [2021-06-05 05:55:54,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22522 states, 22521 states have (on average 3.013010079481373) internal successors, (67856), 22521 states have internal predecessors, (67856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22522 states to 22522 states and 67856 transitions. [2021-06-05 05:55:54,550 INFO L78 Accepts]: Start accepts. Automaton has 22522 states and 67856 transitions. Word has length 54 [2021-06-05 05:55:54,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:54,550 INFO L482 AbstractCegarLoop]: Abstraction has 22522 states and 67856 transitions. [2021-06-05 05:55:54,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:54,550 INFO L276 IsEmpty]: Start isEmpty. Operand 22522 states and 67856 transitions. [2021-06-05 05:55:54,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:54,572 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:54,572 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:55:54,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable207 [2021-06-05 05:55:54,772 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:55:54,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:55:54,773 INFO L82 PathProgramCache]: Analyzing trace with hash 2074193219, now seen corresponding path program 174 times [2021-06-05 05:55:54,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:55:54,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441849407] [2021-06-05 05:55:54,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:55:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:55:55,200 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:55,200 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:55:55,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441849407] [2021-06-05 05:55:55,200 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441849407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:55,200 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027265629] [2021-06-05 05:55:55,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:55:55,232 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:55:55,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:55:55,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:55:55,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:55:55,519 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:55:55,520 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:55:55,520 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 05:55:55,521 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:55,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:55,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:55:55,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:30 [2021-06-05 05:55:55,675 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:55:55,675 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 05:55:55,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:55:55,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:55:55,681 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 05:55:55,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:55:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:55:55,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027265629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:55:55,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:55:55,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 37 [2021-06-05 05:55:55,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164536985] [2021-06-05 05:55:55,830 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:55:55,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:55:55,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:55:55,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:55:55,830 INFO L87 Difference]: Start difference. First operand 22522 states and 67856 transitions. Second operand has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:59,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:55:59,626 INFO L93 Difference]: Finished difference Result 25634 states and 76422 transitions. [2021-06-05 05:55:59,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:55:59,626 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:55:59,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:55:59,661 INFO L225 Difference]: With dead ends: 25634 [2021-06-05 05:55:59,661 INFO L226 Difference]: Without dead ends: 25253 [2021-06-05 05:55:59,662 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2117 ImplicationChecksByTransitivity, 2891.2ms TimeCoverageRelationStatistics Valid=570, Invalid=7440, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 05:55:59,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25253 states. [2021-06-05 05:55:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25253 to 22595. [2021-06-05 05:55:59,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22595 states, 22594 states have (on average 3.0117287775515624) internal successors, (68047), 22594 states have internal predecessors, (68047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:59,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22595 states to 22595 states and 68047 transitions. [2021-06-05 05:55:59,953 INFO L78 Accepts]: Start accepts. Automaton has 22595 states and 68047 transitions. Word has length 54 [2021-06-05 05:55:59,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:55:59,953 INFO L482 AbstractCegarLoop]: Abstraction has 22595 states and 68047 transitions. [2021-06-05 05:55:59,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.5526315789473686) internal successors, (97), 37 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:55:59,953 INFO L276 IsEmpty]: Start isEmpty. Operand 22595 states and 68047 transitions. [2021-06-05 05:55:59,973 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:55:59,973 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:55:59,973 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:00,174 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:00,174 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:00,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:00,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1149620327, now seen corresponding path program 175 times [2021-06-05 05:56:00,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:00,174 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52029648] [2021-06-05 05:56:00,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:00,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:00,588 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:00,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:00,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52029648] [2021-06-05 05:56:00,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [52029648] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:00,589 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437672178] [2021-06-05 05:56:00,589 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:00,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:00,620 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:00,621 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:00,864 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:00,865 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 33 treesize of output 17 [2021-06-05 05:56:00,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:00,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:00,874 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 05:56:00,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:56:01,012 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:01,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:56:01,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:01,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:01,018 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 05:56:01,018 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:56:01,162 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:01,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437672178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:01,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:01,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:01,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100944963] [2021-06-05 05:56:01,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:01,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:01,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:01,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:01,163 INFO L87 Difference]: Start difference. First operand 22595 states and 68047 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:04,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:04,170 INFO L93 Difference]: Finished difference Result 26965 states and 79874 transitions. [2021-06-05 05:56:04,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:56:04,170 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:04,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:04,208 INFO L225 Difference]: With dead ends: 26965 [2021-06-05 05:56:04,208 INFO L226 Difference]: Without dead ends: 26390 [2021-06-05 05:56:04,209 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1267 ImplicationChecksByTransitivity, 2020.8ms TimeCoverageRelationStatistics Valid=360, Invalid=4896, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:56:04,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26390 states. [2021-06-05 05:56:04,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26390 to 22428. [2021-06-05 05:56:04,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22428 states, 22427 states have (on average 3.01261871850894) internal successors, (67564), 22427 states have internal predecessors, (67564), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:04,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22428 states to 22428 states and 67564 transitions. [2021-06-05 05:56:04,513 INFO L78 Accepts]: Start accepts. Automaton has 22428 states and 67564 transitions. Word has length 54 [2021-06-05 05:56:04,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:04,513 INFO L482 AbstractCegarLoop]: Abstraction has 22428 states and 67564 transitions. [2021-06-05 05:56:04,514 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:04,514 INFO L276 IsEmpty]: Start isEmpty. Operand 22428 states and 67564 transitions. [2021-06-05 05:56:04,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:04,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:04,535 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:04,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:04,736 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash -661263769, now seen corresponding path program 176 times [2021-06-05 05:56:04,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:04,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451120545] [2021-06-05 05:56:04,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:04,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:05,123 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:05,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451120545] [2021-06-05 05:56:05,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451120545] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:05,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609930312] [2021-06-05 05:56:05,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:05,154 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:05,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:05,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:05,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:05,395 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:56:05,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 05:56:05,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:05,405 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:05,405 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 05:56:05,405 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-06-05 05:56:05,542 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:05,542 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 05:56:05,543 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:05,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:05,548 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 05:56:05,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:56:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:05,697 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609930312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:05,697 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:05,697 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:05,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580201191] [2021-06-05 05:56:05,697 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:05,697 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:05,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:05,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:05,698 INFO L87 Difference]: Start difference. First operand 22428 states and 67564 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:09,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:09,322 INFO L93 Difference]: Finished difference Result 27159 states and 80399 transitions. [2021-06-05 05:56:09,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 05:56:09,322 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:09,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:09,361 INFO L225 Difference]: With dead ends: 27159 [2021-06-05 05:56:09,361 INFO L226 Difference]: Without dead ends: 26712 [2021-06-05 05:56:09,362 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1621 ImplicationChecksByTransitivity, 2356.5ms TimeCoverageRelationStatistics Valid=435, Invalid=6045, Unknown=0, NotChecked=0, Total=6480 [2021-06-05 05:56:09,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26712 states. [2021-06-05 05:56:09,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26712 to 22413. [2021-06-05 05:56:09,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22413 states, 22412 states have (on average 3.0134303051936464) internal successors, (67537), 22412 states have internal predecessors, (67537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22413 states to 22413 states and 67537 transitions. [2021-06-05 05:56:09,667 INFO L78 Accepts]: Start accepts. Automaton has 22413 states and 67537 transitions. Word has length 54 [2021-06-05 05:56:09,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:09,667 INFO L482 AbstractCegarLoop]: Abstraction has 22413 states and 67537 transitions. [2021-06-05 05:56:09,667 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:09,667 INFO L276 IsEmpty]: Start isEmpty. Operand 22413 states and 67537 transitions. [2021-06-05 05:56:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:09,689 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:09,689 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:09,889 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2021-06-05 05:56:09,889 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:09,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:09,890 INFO L82 PathProgramCache]: Analyzing trace with hash 828652195, now seen corresponding path program 177 times [2021-06-05 05:56:09,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:09,890 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458483540] [2021-06-05 05:56:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:10,283 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:10,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:10,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458483540] [2021-06-05 05:56:10,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458483540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:10,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065919862] [2021-06-05 05:56:10,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:10,323 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:56:10,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:10,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:10,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:10,566 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:10,567 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 33 treesize of output 17 [2021-06-05 05:56:10,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:10,576 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:10,577 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 05:56:10,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 05:56:10,690 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:56:10,691 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:10,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 05:56:10,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:10,699 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:10,700 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 05:56:10,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-05 05:56:10,886 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:10,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065919862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:10,887 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:10,887 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:10,887 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517335137] [2021-06-05 05:56:10,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:10,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:10,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:10,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:10,887 INFO L87 Difference]: Start difference. First operand 22413 states and 67537 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:15,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:15,156 INFO L93 Difference]: Finished difference Result 28724 states and 85176 transitions. [2021-06-05 05:56:15,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-06-05 05:56:15,157 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:15,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:15,201 INFO L225 Difference]: With dead ends: 28724 [2021-06-05 05:56:15,201 INFO L226 Difference]: Without dead ends: 28503 [2021-06-05 05:56:15,202 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1371 ImplicationChecksByTransitivity, 2466.3ms TimeCoverageRelationStatistics Valid=439, Invalid=5723, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:56:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28503 states. [2021-06-05 05:56:15,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28503 to 22463. [2021-06-05 05:56:15,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22463 states, 22462 states have (on average 3.0117086635206127) internal successors, (67649), 22462 states have internal predecessors, (67649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:15,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22463 states to 22463 states and 67649 transitions. [2021-06-05 05:56:15,553 INFO L78 Accepts]: Start accepts. Automaton has 22463 states and 67649 transitions. Word has length 54 [2021-06-05 05:56:15,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:15,553 INFO L482 AbstractCegarLoop]: Abstraction has 22463 states and 67649 transitions. [2021-06-05 05:56:15,553 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:15,553 INFO L276 IsEmpty]: Start isEmpty. Operand 22463 states and 67649 transitions. [2021-06-05 05:56:15,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:15,576 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:15,576 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:15,778 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:15,778 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:15,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:15,779 INFO L82 PathProgramCache]: Analyzing trace with hash -1872214905, now seen corresponding path program 178 times [2021-06-05 05:56:15,779 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:15,779 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651102757] [2021-06-05 05:56:15,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:15,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:16,187 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:16,187 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651102757] [2021-06-05 05:56:16,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651102757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:16,187 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594848084] [2021-06-05 05:56:16,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:16,221 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:56:16,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:16,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:16,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:16,473 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:16,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:56:16,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:16,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:16,488 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 05:56:16,488 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:56:16,595 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:16,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:56:16,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:16,601 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:16,601 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 05:56:16,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:56:16,781 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:16,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594848084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:16,781 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:16,781 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:16,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323145491] [2021-06-05 05:56:16,781 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:16,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:16,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:16,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:16,782 INFO L87 Difference]: Start difference. First operand 22463 states and 67649 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:20,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:20,910 INFO L93 Difference]: Finished difference Result 30237 states and 89270 transitions. [2021-06-05 05:56:20,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-06-05 05:56:20,911 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:20,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:20,953 INFO L225 Difference]: With dead ends: 30237 [2021-06-05 05:56:20,953 INFO L226 Difference]: Without dead ends: 29849 [2021-06-05 05:56:20,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 2588.9ms TimeCoverageRelationStatistics Valid=504, Invalid=6978, Unknown=0, NotChecked=0, Total=7482 [2021-06-05 05:56:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29849 states. [2021-06-05 05:56:21,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29849 to 22392. [2021-06-05 05:56:21,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22392 states, 22391 states have (on average 3.0137555267741503) internal successors, (67481), 22391 states have internal predecessors, (67481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22392 states to 22392 states and 67481 transitions. [2021-06-05 05:56:21,297 INFO L78 Accepts]: Start accepts. Automaton has 22392 states and 67481 transitions. Word has length 54 [2021-06-05 05:56:21,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:21,297 INFO L482 AbstractCegarLoop]: Abstraction has 22392 states and 67481 transitions. [2021-06-05 05:56:21,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 22392 states and 67481 transitions. [2021-06-05 05:56:21,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:21,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:21,318 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:21,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2021-06-05 05:56:21,518 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:21,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:21,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1114390511, now seen corresponding path program 179 times [2021-06-05 05:56:21,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:21,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191532892] [2021-06-05 05:56:21,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:21,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:21,898 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:21,899 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:21,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191532892] [2021-06-05 05:56:21,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191532892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:21,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945034200] [2021-06-05 05:56:21,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:21,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:56:21,933 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:21,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:56:21,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:22,203 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:22,203 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 31 treesize of output 15 [2021-06-05 05:56:22,204 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:22,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:22,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 05:56:22,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:33 [2021-06-05 05:56:22,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:56:22,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:22,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 05:56:22,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:22,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:22,452 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 05:56:22,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:44, output treesize:13 [2021-06-05 05:56:22,609 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:22,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945034200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:22,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:22,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:22,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935849774] [2021-06-05 05:56:22,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:22,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:22,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:22,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:22,610 INFO L87 Difference]: Start difference. First operand 22392 states and 67481 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:26,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:26,083 INFO L93 Difference]: Finished difference Result 26097 states and 77618 transitions. [2021-06-05 05:56:26,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:56:26,083 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:26,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:26,121 INFO L225 Difference]: With dead ends: 26097 [2021-06-05 05:56:26,121 INFO L226 Difference]: Without dead ends: 25876 [2021-06-05 05:56:26,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 2080.1ms TimeCoverageRelationStatistics Valid=339, Invalid=4353, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:56:26,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25876 states. [2021-06-05 05:56:26,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25876 to 22477. [2021-06-05 05:56:26,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22477 states, 22476 states have (on average 3.011923829862965) internal successors, (67696), 22476 states have internal predecessors, (67696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:26,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22477 states to 22477 states and 67696 transitions. [2021-06-05 05:56:26,430 INFO L78 Accepts]: Start accepts. Automaton has 22477 states and 67696 transitions. Word has length 54 [2021-06-05 05:56:26,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:26,430 INFO L482 AbstractCegarLoop]: Abstraction has 22477 states and 67696 transitions. [2021-06-05 05:56:26,430 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:26,430 INFO L276 IsEmpty]: Start isEmpty. Operand 22477 states and 67696 transitions. [2021-06-05 05:56:26,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:26,452 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:26,452 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:26,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 05:56:26,653 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:26,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:26,653 INFO L82 PathProgramCache]: Analyzing trace with hash -2063723439, now seen corresponding path program 180 times [2021-06-05 05:56:26,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:26,653 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557010806] [2021-06-05 05:56:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:26,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:27,022 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:27,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:27,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557010806] [2021-06-05 05:56:27,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557010806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:27,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459098132] [2021-06-05 05:56:27,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:27,055 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:56:27,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:27,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:56:27,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:27,298 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:27,299 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 33 treesize of output 17 [2021-06-05 05:56:27,299 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:27,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:27,309 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 05:56:27,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 05:56:27,458 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:27,458 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 29 treesize of output 13 [2021-06-05 05:56:27,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:27,464 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:27,464 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:27,464 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:56:27,602 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:27,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459098132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:27,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:27,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:27,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907349703] [2021-06-05 05:56:27,603 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:27,603 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:27,603 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:27,603 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:27,603 INFO L87 Difference]: Start difference. First operand 22477 states and 67696 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:30,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:30,532 INFO L93 Difference]: Finished difference Result 26344 states and 78265 transitions. [2021-06-05 05:56:30,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:56:30,532 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:30,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:30,568 INFO L225 Difference]: With dead ends: 26344 [2021-06-05 05:56:30,569 INFO L226 Difference]: Without dead ends: 26059 [2021-06-05 05:56:30,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 968 ImplicationChecksByTransitivity, 1801.0ms TimeCoverageRelationStatistics Valid=306, Invalid=3984, Unknown=0, NotChecked=0, Total=4290 [2021-06-05 05:56:30,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26059 states. [2021-06-05 05:56:30,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26059 to 22401. [2021-06-05 05:56:30,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22401 states, 22400 states have (on average 3.013705357142857) internal successors, (67507), 22400 states have internal predecessors, (67507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:30,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22401 states to 22401 states and 67507 transitions. [2021-06-05 05:56:30,867 INFO L78 Accepts]: Start accepts. Automaton has 22401 states and 67507 transitions. Word has length 54 [2021-06-05 05:56:30,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:30,867 INFO L482 AbstractCegarLoop]: Abstraction has 22401 states and 67507 transitions. [2021-06-05 05:56:30,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:30,867 INFO L276 IsEmpty]: Start isEmpty. Operand 22401 states and 67507 transitions. [2021-06-05 05:56:30,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:30,890 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:30,890 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:31,090 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable214 [2021-06-05 05:56:31,090 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:31,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:31,091 INFO L82 PathProgramCache]: Analyzing trace with hash -2047330315, now seen corresponding path program 181 times [2021-06-05 05:56:31,091 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:31,091 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880183028] [2021-06-05 05:56:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:31,488 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:31,488 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:31,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880183028] [2021-06-05 05:56:31,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880183028] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:31,488 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187312261] [2021-06-05 05:56:31,489 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:31,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:31,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:31,765 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:31,765 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:56:31,766 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:31,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:31,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:31,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:56:31,914 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:56:31,915 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 29 treesize of output 13 [2021-06-05 05:56:31,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:31,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:31,921 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 05:56:31,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:56:32,070 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:32,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1187312261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:32,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:32,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:32,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267031885] [2021-06-05 05:56:32,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:32,071 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:32,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:32,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:32,071 INFO L87 Difference]: Start difference. First operand 22401 states and 67507 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:35,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:35,459 INFO L93 Difference]: Finished difference Result 26702 states and 79255 transitions. [2021-06-05 05:56:35,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:56:35,459 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:35,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:35,498 INFO L225 Difference]: With dead ends: 26702 [2021-06-05 05:56:35,498 INFO L226 Difference]: Without dead ends: 26376 [2021-06-05 05:56:35,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1291 ImplicationChecksByTransitivity, 2143.5ms TimeCoverageRelationStatistics Valid=375, Invalid=5175, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:56:35,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26376 states. [2021-06-05 05:56:35,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26376 to 22413. [2021-06-05 05:56:35,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22413 states, 22412 states have (on average 3.0135641620560416) internal successors, (67540), 22412 states have internal predecessors, (67540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22413 states to 22413 states and 67540 transitions. [2021-06-05 05:56:35,830 INFO L78 Accepts]: Start accepts. Automaton has 22413 states and 67540 transitions. Word has length 54 [2021-06-05 05:56:35,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:35,830 INFO L482 AbstractCegarLoop]: Abstraction has 22413 states and 67540 transitions. [2021-06-05 05:56:35,830 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:35,830 INFO L276 IsEmpty]: Start isEmpty. Operand 22413 states and 67540 transitions. [2021-06-05 05:56:35,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:35,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:35,853 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:36,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable215,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:36,054 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:36,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:36,054 INFO L82 PathProgramCache]: Analyzing trace with hash -726874581, now seen corresponding path program 182 times [2021-06-05 05:56:36,054 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:36,054 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744630198] [2021-06-05 05:56:36,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:36,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:36,434 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:36,434 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744630198] [2021-06-05 05:56:36,434 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744630198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:36,434 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353717748] [2021-06-05 05:56:36,435 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:36,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:56:36,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:36,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:36,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:36,710 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:56:36,710 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 37 treesize of output 17 [2021-06-05 05:56:36,711 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:36,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:36,720 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 05:56:36,720 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:56, output treesize:30 [2021-06-05 05:56:36,826 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:36,826 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:56:36,827 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:36,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:36,832 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 05:56:36,832 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:56:37,012 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:37,012 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353717748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:37,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:37,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:37,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970710690] [2021-06-05 05:56:37,013 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:37,013 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:37,013 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:37,013 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:37,013 INFO L87 Difference]: Start difference. First operand 22413 states and 67540 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:40,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:40,271 INFO L93 Difference]: Finished difference Result 29140 states and 86440 transitions. [2021-06-05 05:56:40,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-06-05 05:56:40,272 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:40,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:40,312 INFO L225 Difference]: With dead ends: 29140 [2021-06-05 05:56:40,313 INFO L226 Difference]: Without dead ends: 28919 [2021-06-05 05:56:40,313 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1145 ImplicationChecksByTransitivity, 2015.5ms TimeCoverageRelationStatistics Valid=354, Invalid=4758, Unknown=0, NotChecked=0, Total=5112 [2021-06-05 05:56:40,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28919 states. [2021-06-05 05:56:40,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28919 to 22417. [2021-06-05 05:56:40,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22417 states, 22416 states have (on average 3.013517130620985) internal successors, (67551), 22416 states have internal predecessors, (67551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:40,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22417 states to 22417 states and 67551 transitions. [2021-06-05 05:56:40,630 INFO L78 Accepts]: Start accepts. Automaton has 22417 states and 67551 transitions. Word has length 54 [2021-06-05 05:56:40,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:40,630 INFO L482 AbstractCegarLoop]: Abstraction has 22417 states and 67551 transitions. [2021-06-05 05:56:40,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:40,630 INFO L276 IsEmpty]: Start isEmpty. Operand 22417 states and 67551 transitions. [2021-06-05 05:56:40,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:40,652 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:40,652 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:40,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:40,852 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:40,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:40,852 INFO L82 PathProgramCache]: Analyzing trace with hash 867225615, now seen corresponding path program 183 times [2021-06-05 05:56:40,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:40,853 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994415799] [2021-06-05 05:56:40,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:40,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:41,234 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:41,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:41,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994415799] [2021-06-05 05:56:41,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994415799] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:41,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862715542] [2021-06-05 05:56:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:41,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:56:41,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:41,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:41,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:41,513 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:41,513 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 33 treesize of output 17 [2021-06-05 05:56:41,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:41,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:41,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:56:41,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:34 [2021-06-05 05:56:41,628 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:41,628 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 29 treesize of output 13 [2021-06-05 05:56:41,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:41,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:41,634 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 05:56:41,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:56:41,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:41,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862715542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:41,814 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:41,814 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:41,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499619884] [2021-06-05 05:56:41,814 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:41,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:41,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:41,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:41,815 INFO L87 Difference]: Start difference. First operand 22417 states and 67551 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:45,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:45,196 INFO L93 Difference]: Finished difference Result 29708 states and 87988 transitions. [2021-06-05 05:56:45,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:56:45,197 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:45,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:45,241 INFO L225 Difference]: With dead ends: 29708 [2021-06-05 05:56:45,241 INFO L226 Difference]: Without dead ends: 29522 [2021-06-05 05:56:45,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1329 ImplicationChecksByTransitivity, 2144.3ms TimeCoverageRelationStatistics Valid=377, Invalid=5323, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:56:45,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29522 states. [2021-06-05 05:56:45,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29522 to 22401. [2021-06-05 05:56:45,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22401 states, 22400 states have (on average 3.013705357142857) internal successors, (67507), 22400 states have internal predecessors, (67507), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:45,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22401 states to 22401 states and 67507 transitions. [2021-06-05 05:56:45,581 INFO L78 Accepts]: Start accepts. Automaton has 22401 states and 67507 transitions. Word has length 54 [2021-06-05 05:56:45,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:45,581 INFO L482 AbstractCegarLoop]: Abstraction has 22401 states and 67507 transitions. [2021-06-05 05:56:45,582 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:45,582 INFO L276 IsEmpty]: Start isEmpty. Operand 22401 states and 67507 transitions. [2021-06-05 05:56:45,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:45,603 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:45,603 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:45,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 05:56:45,805 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:45,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:45,805 INFO L82 PathProgramCache]: Analyzing trace with hash -874430943, now seen corresponding path program 184 times [2021-06-05 05:56:45,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:45,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761906888] [2021-06-05 05:56:45,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:45,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:46,252 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:46,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761906888] [2021-06-05 05:56:46,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761906888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:46,252 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026260252] [2021-06-05 05:56:46,252 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:46,296 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:56:46,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:46,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:46,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:46,582 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:46,582 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 33 treesize of output 17 [2021-06-05 05:56:46,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:46,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:46,594 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 05:56:46,594 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:56:46,775 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:46,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:56:46,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:46,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:46,781 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 05:56:46,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:56:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:46,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1026260252] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:46,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:46,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:56:46,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611398256] [2021-06-05 05:56:46,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:56:46,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:46,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:56:46,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:56:46,929 INFO L87 Difference]: Start difference. First operand 22401 states and 67507 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:49,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:49,671 INFO L93 Difference]: Finished difference Result 26449 states and 78529 transitions. [2021-06-05 05:56:49,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:56:49,671 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:49,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:49,708 INFO L225 Difference]: With dead ends: 26449 [2021-06-05 05:56:49,708 INFO L226 Difference]: Without dead ends: 26111 [2021-06-05 05:56:49,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1035 ImplicationChecksByTransitivity, 1957.8ms TimeCoverageRelationStatistics Valid=333, Invalid=4223, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:56:49,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26111 states. [2021-06-05 05:56:49,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26111 to 22416. [2021-06-05 05:56:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22416 states, 22415 states have (on average 3.013696185590007) internal successors, (67552), 22415 states have internal predecessors, (67552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:50,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22416 states to 22416 states and 67552 transitions. [2021-06-05 05:56:50,003 INFO L78 Accepts]: Start accepts. Automaton has 22416 states and 67552 transitions. Word has length 54 [2021-06-05 05:56:50,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:50,003 INFO L482 AbstractCegarLoop]: Abstraction has 22416 states and 67552 transitions. [2021-06-05 05:56:50,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:50,003 INFO L276 IsEmpty]: Start isEmpty. Operand 22416 states and 67552 transitions. [2021-06-05 05:56:50,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:50,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:50,025 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:50,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:50,229 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:50,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:50,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1193779097, now seen corresponding path program 185 times [2021-06-05 05:56:50,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:50,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479599572] [2021-06-05 05:56:50,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:50,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:50,590 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:56:50,590 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479599572] [2021-06-05 05:56:50,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479599572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:50,590 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100395436] [2021-06-05 05:56:50,590 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:50,622 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:56:50,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:56:50,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:50,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:56:50,989 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:56:50,989 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-06-05 05:56:50,990 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:51,002 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:51,003 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 05:56:51,003 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:52, output treesize:23 [2021-06-05 05:56:51,192 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:56:51,193 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:56:51,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:51,199 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:51,200 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 05:56:51,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-06-05 05:56:51,420 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:51,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100395436] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:51,420 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:51,420 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 41 [2021-06-05 05:56:51,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962707147] [2021-06-05 05:56:51,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 42 states [2021-06-05 05:56:51,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:51,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-06-05 05:56:51,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1605, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:56:51,421 INFO L87 Difference]: Start difference. First operand 22416 states and 67552 transitions. Second operand has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:57,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:56:57,447 INFO L93 Difference]: Finished difference Result 27133 states and 80664 transitions. [2021-06-05 05:56:57,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-06-05 05:56:57,448 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:56:57,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:56:57,485 INFO L225 Difference]: With dead ends: 27133 [2021-06-05 05:56:57,485 INFO L226 Difference]: Without dead ends: 26890 [2021-06-05 05:56:57,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 34 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4120 ImplicationChecksByTransitivity, 4250.5ms TimeCoverageRelationStatistics Valid=890, Invalid=13152, Unknown=0, NotChecked=0, Total=14042 [2021-06-05 05:56:57,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26890 states. [2021-06-05 05:56:57,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26890 to 22687. [2021-06-05 05:56:57,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22687 states, 22686 states have (on average 3.010006171206912) internal successors, (68285), 22686 states have internal predecessors, (68285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:57,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22687 states to 22687 states and 68285 transitions. [2021-06-05 05:56:57,790 INFO L78 Accepts]: Start accepts. Automaton has 22687 states and 68285 transitions. Word has length 54 [2021-06-05 05:56:57,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:56:57,791 INFO L482 AbstractCegarLoop]: Abstraction has 22687 states and 68285 transitions. [2021-06-05 05:56:57,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 42 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:56:57,791 INFO L276 IsEmpty]: Start isEmpty. Operand 22687 states and 68285 transitions. [2021-06-05 05:56:57,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:56:57,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:56:57,812 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:56:58,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 05:56:58,013 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:56:58,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:56:58,013 INFO L82 PathProgramCache]: Analyzing trace with hash 637452473, now seen corresponding path program 186 times [2021-06-05 05:56:58,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:56:58,013 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1736270719] [2021-06-05 05:56:58,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:56:58,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:56:58,369 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:58,369 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:56:58,369 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1736270719] [2021-06-05 05:56:58,369 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1736270719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:58,370 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902990890] [2021-06-05 05:56:58,370 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:56:58,405 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:56:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:56:58,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:56:58,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:56:58,615 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:58,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:56:58,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:58,624 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:58,624 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 05:56:58,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:56:58,794 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:56:58,794 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 05:56:58,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:56:58,799 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:56:58,800 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 05:56:58,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:56:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:56:59,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1902990890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:56:59,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:56:59,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:56:59,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891991281] [2021-06-05 05:56:59,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:56:59,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:56:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:56:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:56:59,003 INFO L87 Difference]: Start difference. First operand 22687 states and 68285 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:01,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:01,687 INFO L93 Difference]: Finished difference Result 26723 states and 79264 transitions. [2021-06-05 05:57:01,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-06-05 05:57:01,687 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:01,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:01,724 INFO L225 Difference]: With dead ends: 26723 [2021-06-05 05:57:01,724 INFO L226 Difference]: Without dead ends: 26406 [2021-06-05 05:57:01,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1178 ImplicationChecksByTransitivity, 1870.5ms TimeCoverageRelationStatistics Valid=352, Invalid=4618, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:57:01,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26406 states. [2021-06-05 05:57:01,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26406 to 22686. [2021-06-05 05:57:01,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22686 states, 22685 states have (on average 3.0098743663213576) internal successors, (68279), 22685 states have internal predecessors, (68279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:02,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22686 states to 22686 states and 68279 transitions. [2021-06-05 05:57:02,029 INFO L78 Accepts]: Start accepts. Automaton has 22686 states and 68279 transitions. Word has length 54 [2021-06-05 05:57:02,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:02,029 INFO L482 AbstractCegarLoop]: Abstraction has 22686 states and 68279 transitions. [2021-06-05 05:57:02,030 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:02,030 INFO L276 IsEmpty]: Start isEmpty. Operand 22686 states and 68279 transitions. [2021-06-05 05:57:02,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:02,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:02,051 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:02,251 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:02,251 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:02,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:02,252 INFO L82 PathProgramCache]: Analyzing trace with hash 733464939, now seen corresponding path program 187 times [2021-06-05 05:57:02,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:02,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380645304] [2021-06-05 05:57:02,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:02,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:02,606 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:02,606 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380645304] [2021-06-05 05:57:02,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380645304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:02,606 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14857519] [2021-06-05 05:57:02,606 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:02,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:02,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:57:02,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:02,847 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:02,848 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 05:57:02,848 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:02,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:02,856 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 05:57:02,856 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:57:03,023 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:03,023 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 05:57:03,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:03,029 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:03,029 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 05:57:03,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:57:03,179 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:03,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14857519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:03,179 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:03,179 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:03,179 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049863374] [2021-06-05 05:57:03,179 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:03,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:03,180 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:03,180 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:03,180 INFO L87 Difference]: Start difference. First operand 22686 states and 68279 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:06,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:06,259 INFO L93 Difference]: Finished difference Result 26443 states and 78505 transitions. [2021-06-05 05:57:06,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:57:06,259 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:06,297 INFO L225 Difference]: With dead ends: 26443 [2021-06-05 05:57:06,297 INFO L226 Difference]: Without dead ends: 26082 [2021-06-05 05:57:06,298 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1013 ImplicationChecksByTransitivity, 1843.0ms TimeCoverageRelationStatistics Valid=325, Invalid=4367, Unknown=0, NotChecked=0, Total=4692 [2021-06-05 05:57:06,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26082 states. [2021-06-05 05:57:06,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26082 to 22674. [2021-06-05 05:57:06,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22674 states, 22673 states have (on average 3.0101883297313985) internal successors, (68250), 22673 states have internal predecessors, (68250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:06,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22674 states to 22674 states and 68250 transitions. [2021-06-05 05:57:06,615 INFO L78 Accepts]: Start accepts. Automaton has 22674 states and 68250 transitions. Word has length 54 [2021-06-05 05:57:06,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:06,615 INFO L482 AbstractCegarLoop]: Abstraction has 22674 states and 68250 transitions. [2021-06-05 05:57:06,615 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:06,615 INFO L276 IsEmpty]: Start isEmpty. Operand 22674 states and 68250 transitions. [2021-06-05 05:57:06,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:06,638 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:06,638 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:06,839 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:06,839 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:06,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:06,839 INFO L82 PathProgramCache]: Analyzing trace with hash -1377324187, now seen corresponding path program 188 times [2021-06-05 05:57:06,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:06,840 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221905897] [2021-06-05 05:57:06,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:06,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:07,239 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:07,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:07,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221905897] [2021-06-05 05:57:07,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221905897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:07,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65330615] [2021-06-05 05:57:07,239 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:07,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:57:07,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:07,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:57:07,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:07,487 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:57:07,487 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 37 treesize of output 17 [2021-06-05 05:57:07,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:07,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:07,496 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 05:57:07,496 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:57:07,672 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:07,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:57:07,673 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:07,677 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:07,678 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 05:57:07,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:57:07,823 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:07,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65330615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:07,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:07,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:07,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247037939] [2021-06-05 05:57:07,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:07,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:07,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:07,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:07,824 INFO L87 Difference]: Start difference. First operand 22674 states and 68250 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:10,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:10,634 INFO L93 Difference]: Finished difference Result 26641 states and 79072 transitions. [2021-06-05 05:57:10,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 05:57:10,634 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:10,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:10,674 INFO L225 Difference]: With dead ends: 26641 [2021-06-05 05:57:10,675 INFO L226 Difference]: Without dead ends: 26303 [2021-06-05 05:57:10,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 994 ImplicationChecksByTransitivity, 1826.7ms TimeCoverageRelationStatistics Valid=322, Invalid=4100, Unknown=0, NotChecked=0, Total=4422 [2021-06-05 05:57:10,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26303 states. [2021-06-05 05:57:10,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26303 to 22675. [2021-06-05 05:57:10,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22675 states, 22674 states have (on average 3.0102319837699567) internal successors, (68254), 22674 states have internal predecessors, (68254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:10,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22675 states to 22675 states and 68254 transitions. [2021-06-05 05:57:10,980 INFO L78 Accepts]: Start accepts. Automaton has 22675 states and 68254 transitions. Word has length 54 [2021-06-05 05:57:10,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:10,980 INFO L482 AbstractCegarLoop]: Abstraction has 22675 states and 68254 transitions. [2021-06-05 05:57:10,980 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:10,980 INFO L276 IsEmpty]: Start isEmpty. Operand 22675 states and 68254 transitions. [2021-06-05 05:57:11,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:11,002 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:11,002 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:11,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2021-06-05 05:57:11,203 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:11,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:11,203 INFO L82 PathProgramCache]: Analyzing trace with hash 690885853, now seen corresponding path program 189 times [2021-06-05 05:57:11,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:11,203 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849004503] [2021-06-05 05:57:11,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:11,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:11,577 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:11,577 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:11,577 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849004503] [2021-06-05 05:57:11,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849004503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:11,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846023082] [2021-06-05 05:57:11,578 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 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:11,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:57:11,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:11,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:57:11,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:11,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:57:11,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:57:11,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 05:57:11,857 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:11,868 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:11,868 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 05:57:11,869 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:55, output treesize:25 [2021-06-05 05:57:12,106 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:12,106 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 05:57:12,107 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:12,111 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:12,112 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 05:57:12,112 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:57:12,264 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:12,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846023082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:12,264 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:12,264 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 39 [2021-06-05 05:57:12,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4200534] [2021-06-05 05:57:12,264 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:57:12,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:12,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:57:12,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:57:12,265 INFO L87 Difference]: Start difference. First operand 22675 states and 68254 transitions. Second operand has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:16,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:16,414 INFO L93 Difference]: Finished difference Result 25966 states and 77257 transitions. [2021-06-05 05:57:16,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:57:16,414 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:16,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:16,452 INFO L225 Difference]: With dead ends: 25966 [2021-06-05 05:57:16,452 INFO L226 Difference]: Without dead ends: 25506 [2021-06-05 05:57:16,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 3084.9ms TimeCoverageRelationStatistics Valid=601, Invalid=8329, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:57:16,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25506 states. [2021-06-05 05:57:16,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25506 to 22632. [2021-06-05 05:57:16,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22632 states, 22631 states have (on average 3.011797976227299) internal successors, (68160), 22631 states have internal predecessors, (68160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22632 states to 22632 states and 68160 transitions. [2021-06-05 05:57:16,755 INFO L78 Accepts]: Start accepts. Automaton has 22632 states and 68160 transitions. Word has length 54 [2021-06-05 05:57:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:16,755 INFO L482 AbstractCegarLoop]: Abstraction has 22632 states and 68160 transitions. [2021-06-05 05:57:16,755 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.425) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 22632 states and 68160 transitions. [2021-06-05 05:57:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:16,778 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:16,778 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:16,978 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 05:57:16,978 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:16,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:16,978 INFO L82 PathProgramCache]: Analyzing trace with hash -233687039, now seen corresponding path program 190 times [2021-06-05 05:57:16,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:16,979 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834515507] [2021-06-05 05:57:16,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:16,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:17,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:17,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:17,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834515507] [2021-06-05 05:57:17,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834515507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:17,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929361879] [2021-06-05 05:57:17,359 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:17,390 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:17,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:17,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:57:17,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:17,596 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:17,596 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 31 treesize of output 15 [2021-06-05 05:57:17,597 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:17,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:17,604 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 05:57:17,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:57:17,769 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:17,769 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 05:57:17,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:17,774 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:17,775 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:17,775 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:57:17,918 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:17,919 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [929361879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:17,919 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:17,919 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:17,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1065866421] [2021-06-05 05:57:17,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:17,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:17,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:17,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:17,919 INFO L87 Difference]: Start difference. First operand 22632 states and 68160 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:20,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:20,877 INFO L93 Difference]: Finished difference Result 27095 states and 80261 transitions. [2021-06-05 05:57:20,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:57:20,878 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:20,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:20,916 INFO L225 Difference]: With dead ends: 27095 [2021-06-05 05:57:20,916 INFO L226 Difference]: Without dead ends: 26636 [2021-06-05 05:57:20,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1351 ImplicationChecksByTransitivity, 2038.7ms TimeCoverageRelationStatistics Valid=378, Invalid=5172, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:57:20,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26636 states. [2021-06-05 05:57:21,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26636 to 22642. [2021-06-05 05:57:21,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22642 states, 22641 states have (on average 3.011439424053708) internal successors, (68182), 22641 states have internal predecessors, (68182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:21,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22642 states to 22642 states and 68182 transitions. [2021-06-05 05:57:21,222 INFO L78 Accepts]: Start accepts. Automaton has 22642 states and 68182 transitions. Word has length 54 [2021-06-05 05:57:21,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:21,222 INFO L482 AbstractCegarLoop]: Abstraction has 22642 states and 68182 transitions. [2021-06-05 05:57:21,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:21,222 INFO L276 IsEmpty]: Start isEmpty. Operand 22642 states and 68182 transitions. [2021-06-05 05:57:21,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:21,245 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:21,245 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:21,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2021-06-05 05:57:21,446 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:21,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:21,446 INFO L82 PathProgramCache]: Analyzing trace with hash -2044571135, now seen corresponding path program 191 times [2021-06-05 05:57:21,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:21,446 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374140326] [2021-06-05 05:57:21,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:21,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:21,814 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:21,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:21,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374140326] [2021-06-05 05:57:21,814 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374140326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:21,814 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84888984] [2021-06-05 05:57:21,814 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:21,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:57:21,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:21,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:57:21,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:22,124 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:22,125 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 31 treesize of output 15 [2021-06-05 05:57:22,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:22,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:22,133 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 05:57:22,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:57:22,299 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:57:22,299 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 29 treesize of output 13 [2021-06-05 05:57:22,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:22,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:22,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:22,305 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:57:22,453 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:22,454 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84888984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:22,454 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:22,454 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:57:22,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919168437] [2021-06-05 05:57:22,454 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:57:22,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:22,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:57:22,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:57:22,454 INFO L87 Difference]: Start difference. First operand 22642 states and 68182 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:26,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:26,255 INFO L93 Difference]: Finished difference Result 27657 states and 81801 transitions. [2021-06-05 05:57:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-06-05 05:57:26,255 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:26,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:26,295 INFO L225 Difference]: With dead ends: 27657 [2021-06-05 05:57:26,295 INFO L226 Difference]: Without dead ends: 27210 [2021-06-05 05:57:26,296 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2213 ImplicationChecksByTransitivity, 2663.9ms TimeCoverageRelationStatistics Valid=551, Invalid=7639, Unknown=0, NotChecked=0, Total=8190 [2021-06-05 05:57:26,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27210 states. [2021-06-05 05:57:26,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27210 to 22676. [2021-06-05 05:57:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22676 states, 22675 states have (on average 3.0112458654906282) internal successors, (68280), 22675 states have internal predecessors, (68280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:26,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22676 states to 22676 states and 68280 transitions. [2021-06-05 05:57:26,609 INFO L78 Accepts]: Start accepts. Automaton has 22676 states and 68280 transitions. Word has length 54 [2021-06-05 05:57:26,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:26,609 INFO L482 AbstractCegarLoop]: Abstraction has 22676 states and 68280 transitions. [2021-06-05 05:57:26,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:26,609 INFO L276 IsEmpty]: Start isEmpty. Operand 22676 states and 68280 transitions. [2021-06-05 05:57:26,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:26,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:26,631 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:26,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,196 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:26,832 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:26,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:26,832 INFO L82 PathProgramCache]: Analyzing trace with hash -554655171, now seen corresponding path program 192 times [2021-06-05 05:57:26,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:26,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927448802] [2021-06-05 05:57:26,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:27,201 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:27,202 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:27,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927448802] [2021-06-05 05:57:27,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927448802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:27,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950962936] [2021-06-05 05:57:27,202 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:27,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:57:27,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:27,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:57:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:27,449 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:27,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 05:57:27,450 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:27,458 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:27,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:57:27,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:57:27,593 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:27,593 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 05:57:27,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:27,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:27,599 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 05:57:27,599 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:57:27,777 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:27,777 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950962936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:27,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:27,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:27,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296394178] [2021-06-05 05:57:27,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:27,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:27,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:27,778 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:27,778 INFO L87 Difference]: Start difference. First operand 22676 states and 68280 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:31,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:31,682 INFO L93 Difference]: Finished difference Result 30104 states and 88987 transitions. [2021-06-05 05:57:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:57:31,682 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:31,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:31,724 INFO L225 Difference]: With dead ends: 30104 [2021-06-05 05:57:31,724 INFO L226 Difference]: Without dead ends: 29801 [2021-06-05 05:57:31,725 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1759 ImplicationChecksByTransitivity, 2513.5ms TimeCoverageRelationStatistics Valid=490, Invalid=6482, Unknown=0, NotChecked=0, Total=6972 [2021-06-05 05:57:31,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29801 states. [2021-06-05 05:57:31,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29801 to 22674. [2021-06-05 05:57:32,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22674 states, 22673 states have (on average 3.0113350681427247) internal successors, (68276), 22673 states have internal predecessors, (68276), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:32,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22674 states to 22674 states and 68276 transitions. [2021-06-05 05:57:32,055 INFO L78 Accepts]: Start accepts. Automaton has 22674 states and 68276 transitions. Word has length 54 [2021-06-05 05:57:32,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:32,055 INFO L482 AbstractCegarLoop]: Abstraction has 22674 states and 68276 transitions. [2021-06-05 05:57:32,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:32,055 INFO L276 IsEmpty]: Start isEmpty. Operand 22674 states and 68276 transitions. [2021-06-05 05:57:32,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:32,076 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:32,076 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:32,276 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2021-06-05 05:57:32,277 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:32,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:32,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1039445025, now seen corresponding path program 193 times [2021-06-05 05:57:32,277 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:32,277 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943692239] [2021-06-05 05:57:32,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:32,645 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:32,645 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:32,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943692239] [2021-06-05 05:57:32,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [943692239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:32,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73309280] [2021-06-05 05:57:32,645 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:32,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:32,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:57:32,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:32,886 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:32,886 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 33 treesize of output 17 [2021-06-05 05:57:32,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:32,894 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:32,895 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 05:57:32,895 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:57:33,028 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:33,029 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 05:57:33,030 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:33,034 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:33,035 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 05:57:33,035 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:57:33,212 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:33,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73309280] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:33,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:33,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:33,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19203221] [2021-06-05 05:57:33,213 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:33,213 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:33,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:33,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:33,213 INFO L87 Difference]: Start difference. First operand 22674 states and 68276 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:37,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:37,365 INFO L93 Difference]: Finished difference Result 30986 states and 91342 transitions. [2021-06-05 05:57:37,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-06-05 05:57:37,365 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:37,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:37,412 INFO L225 Difference]: With dead ends: 30986 [2021-06-05 05:57:37,412 INFO L226 Difference]: Without dead ends: 30648 [2021-06-05 05:57:37,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 2786.4ms TimeCoverageRelationStatistics Valid=588, Invalid=8154, Unknown=0, NotChecked=0, Total=8742 [2021-06-05 05:57:37,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30648 states. [2021-06-05 05:57:37,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30648 to 22728. [2021-06-05 05:57:37,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22728 states, 22727 states have (on average 3.010340124081489) internal successors, (68416), 22727 states have internal predecessors, (68416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:37,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22728 states to 22728 states and 68416 transitions. [2021-06-05 05:57:37,752 INFO L78 Accepts]: Start accepts. Automaton has 22728 states and 68416 transitions. Word has length 54 [2021-06-05 05:57:37,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:37,752 INFO L482 AbstractCegarLoop]: Abstraction has 22728 states and 68416 transitions. [2021-06-05 05:57:37,752 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:37,752 INFO L276 IsEmpty]: Start isEmpty. Operand 22728 states and 68416 transitions. [2021-06-05 05:57:37,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:37,773 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:37,774 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:37,974 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 05:57:37,974 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:37,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:37,974 INFO L82 PathProgramCache]: Analyzing trace with hash 1797269419, now seen corresponding path program 194 times [2021-06-05 05:57:37,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:37,974 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354878428] [2021-06-05 05:57:37,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:37,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:38,360 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:38,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354878428] [2021-06-05 05:57:38,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [354878428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:38,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637658899] [2021-06-05 05:57:38,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:38,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:57:38,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:38,393 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:57:38,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:38,604 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:57:38,604 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 35 treesize of output 15 [2021-06-05 05:57:38,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:38,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:38,613 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 05:57:38,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:23 [2021-06-05 05:57:38,786 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:38,786 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 27 treesize of output 13 [2021-06-05 05:57:38,787 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:38,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:38,792 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 05:57:38,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 05:57:38,945 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:38,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637658899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:38,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:38,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:38,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020252042] [2021-06-05 05:57:38,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:38,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:38,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:38,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:38,946 INFO L87 Difference]: Start difference. First operand 22728 states and 68416 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:42,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:42,184 INFO L93 Difference]: Finished difference Result 26801 states and 79519 transitions. [2021-06-05 05:57:42,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-06-05 05:57:42,184 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:42,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:42,224 INFO L225 Difference]: With dead ends: 26801 [2021-06-05 05:57:42,224 INFO L226 Difference]: Without dead ends: 26440 [2021-06-05 05:57:42,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1044 ImplicationChecksByTransitivity, 1990.4ms TimeCoverageRelationStatistics Valid=341, Invalid=4489, Unknown=0, NotChecked=0, Total=4830 [2021-06-05 05:57:42,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26440 states. [2021-06-05 05:57:42,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26440 to 22733. [2021-06-05 05:57:42,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22733 states, 22732 states have (on average 3.0102938588773536) internal successors, (68430), 22732 states have internal predecessors, (68430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:42,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22733 states to 22733 states and 68430 transitions. [2021-06-05 05:57:42,529 INFO L78 Accepts]: Start accepts. Automaton has 22733 states and 68430 transitions. Word has length 54 [2021-06-05 05:57:42,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:42,529 INFO L482 AbstractCegarLoop]: Abstraction has 22733 states and 68430 transitions. [2021-06-05 05:57:42,529 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:42,529 INFO L276 IsEmpty]: Start isEmpty. Operand 22733 states and 68430 transitions. [2021-06-05 05:57:42,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:42,551 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:42,551 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:42,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:42,753 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:42,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:42,753 INFO L82 PathProgramCache]: Analyzing trace with hash 864329615, now seen corresponding path program 195 times [2021-06-05 05:57:42,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:42,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587074880] [2021-06-05 05:57:42,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:42,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:43,121 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:43,122 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587074880] [2021-06-05 05:57:43,122 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587074880] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:43,122 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475701218] [2021-06-05 05:57:43,122 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:43,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:57:43,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:57:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:43,366 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:43,366 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 33 treesize of output 17 [2021-06-05 05:57:43,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:43,375 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:43,376 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 05:57:43,376 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:57:43,548 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:43,549 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 05:57:43,549 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:43,554 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:43,555 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 05:57:43,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:57:43,705 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:43,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475701218] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:43,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:43,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:43,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668248764] [2021-06-05 05:57:43,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:43,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:43,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:43,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:43,706 INFO L87 Difference]: Start difference. First operand 22733 states and 68430 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:47,302 INFO L93 Difference]: Finished difference Result 27022 states and 80141 transitions. [2021-06-05 05:57:47,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:57:47,302 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:47,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:47,340 INFO L225 Difference]: With dead ends: 27022 [2021-06-05 05:57:47,341 INFO L226 Difference]: Without dead ends: 26696 [2021-06-05 05:57:47,341 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1368 ImplicationChecksByTransitivity, 2207.8ms TimeCoverageRelationStatistics Valid=400, Invalid=5452, Unknown=0, NotChecked=0, Total=5852 [2021-06-05 05:57:47,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26696 states. [2021-06-05 05:57:47,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26696 to 22745. [2021-06-05 05:57:47,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22745 states, 22744 states have (on average 3.0101565247977486) internal successors, (68463), 22744 states have internal predecessors, (68463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:47,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22745 states to 22745 states and 68463 transitions. [2021-06-05 05:57:47,785 INFO L78 Accepts]: Start accepts. Automaton has 22745 states and 68463 transitions. Word has length 54 [2021-06-05 05:57:47,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:47,785 INFO L482 AbstractCegarLoop]: Abstraction has 22745 states and 68463 transitions. [2021-06-05 05:57:47,785 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:47,785 INFO L276 IsEmpty]: Start isEmpty. Operand 22745 states and 68463 transitions. [2021-06-05 05:57:47,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:47,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:47,808 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:48,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2021-06-05 05:57:48,009 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:48,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:48,009 INFO L82 PathProgramCache]: Analyzing trace with hash -2110181947, now seen corresponding path program 196 times [2021-06-05 05:57:48,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:48,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189646708] [2021-06-05 05:57:48,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:48,392 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:48,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:48,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189646708] [2021-06-05 05:57:48,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189646708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:48,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460099358] [2021-06-05 05:57:48,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:48,424 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:57:48,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:48,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:57:48,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:48,646 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:48,646 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:57:48,647 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:48,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:48,655 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 05:57:48,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:57:48,798 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:57:48,798 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 29 treesize of output 13 [2021-06-05 05:57:48,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:48,805 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:48,806 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 05:57:48,806 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:57:48,987 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:48,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1460099358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:48,988 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:48,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:48,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447029849] [2021-06-05 05:57:48,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:48,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:48,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:48,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:48,988 INFO L87 Difference]: Start difference. First operand 22745 states and 68463 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:52,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:52,272 INFO L93 Difference]: Finished difference Result 29468 states and 87348 transitions. [2021-06-05 05:57:52,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:57:52,272 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:52,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:52,316 INFO L225 Difference]: With dead ends: 29468 [2021-06-05 05:57:52,316 INFO L226 Difference]: Without dead ends: 29247 [2021-06-05 05:57:52,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 2099.2ms TimeCoverageRelationStatistics Valid=379, Invalid=5023, Unknown=0, NotChecked=0, Total=5402 [2021-06-05 05:57:52,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29247 states. [2021-06-05 05:57:52,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29247 to 22749. [2021-06-05 05:57:52,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22749 states, 22748 states have (on average 3.0101107789695796) internal successors, (68474), 22748 states have internal predecessors, (68474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:52,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22749 states to 22749 states and 68474 transitions. [2021-06-05 05:57:52,652 INFO L78 Accepts]: Start accepts. Automaton has 22749 states and 68474 transitions. Word has length 54 [2021-06-05 05:57:52,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:52,652 INFO L482 AbstractCegarLoop]: Abstraction has 22749 states and 68474 transitions. [2021-06-05 05:57:52,652 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:52,653 INFO L276 IsEmpty]: Start isEmpty. Operand 22749 states and 68474 transitions. [2021-06-05 05:57:52,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:52,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:52,676 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:52,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:52,876 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:52,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:52,877 INFO L82 PathProgramCache]: Analyzing trace with hash -516081751, now seen corresponding path program 197 times [2021-06-05 05:57:52,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:52,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901976223] [2021-06-05 05:57:52,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:52,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:53,259 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:53,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:53,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901976223] [2021-06-05 05:57:53,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901976223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:53,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791104961] [2021-06-05 05:57:53,259 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:53,291 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:57:53,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:53,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:57:53,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:53,502 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:53,502 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 33 treesize of output 17 [2021-06-05 05:57:53,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:53,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,511 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 05:57:53,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:57:53,647 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:53,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 05:57:53,648 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:53,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:53,653 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 05:57:53,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:13 [2021-06-05 05:57:53,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:53,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791104961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:53,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:53,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:57:53,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454759485] [2021-06-05 05:57:53,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:57:53,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:53,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:57:53,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1237, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:57:53,837 INFO L87 Difference]: Start difference. First operand 22749 states and 68474 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:58,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:57:58,031 INFO L93 Difference]: Finished difference Result 30044 states and 88914 transitions. [2021-06-05 05:57:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:57:58,032 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:57:58,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:57:58,075 INFO L225 Difference]: With dead ends: 30044 [2021-06-05 05:57:58,075 INFO L226 Difference]: Without dead ends: 29858 [2021-06-05 05:57:58,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1408 ImplicationChecksByTransitivity, 2218.6ms TimeCoverageRelationStatistics Valid=402, Invalid=5604, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:57:58,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29858 states. [2021-06-05 05:57:58,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29858 to 22728. [2021-06-05 05:57:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22728 states, 22727 states have (on average 3.010340124081489) internal successors, (68416), 22727 states have internal predecessors, (68416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:58,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22728 states to 22728 states and 68416 transitions. [2021-06-05 05:57:58,427 INFO L78 Accepts]: Start accepts. Automaton has 22728 states and 68416 transitions. Word has length 54 [2021-06-05 05:57:58,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:57:58,427 INFO L482 AbstractCegarLoop]: Abstraction has 22728 states and 68416 transitions. [2021-06-05 05:57:58,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:57:58,427 INFO L276 IsEmpty]: Start isEmpty. Operand 22728 states and 68416 transitions. [2021-06-05 05:57:58,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:57:58,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:57:58,451 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:57:58,651 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:58,651 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:57:58,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:57:58,651 INFO L82 PathProgramCache]: Analyzing trace with hash 822578433, now seen corresponding path program 198 times [2021-06-05 05:57:58,651 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:57:58,651 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660838304] [2021-06-05 05:57:58,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:57:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:57:59,008 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:59,009 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:57:59,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660838304] [2021-06-05 05:57:59,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660838304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:59,009 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76433968] [2021-06-05 05:57:59,009 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:57:59,040 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:57:59,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:57:59,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:57:59,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:57:59,253 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:57:59,253 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 15 [2021-06-05 05:57:59,254 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:59,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:59,262 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 05:57:59,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:57:59,432 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:57:59,433 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 29 treesize of output 13 [2021-06-05 05:57:59,433 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:57:59,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:57:59,438 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 05:57:59,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:57:59,652 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:57:59,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76433968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:57:59,652 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:57:59,652 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:57:59,653 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024852735] [2021-06-05 05:57:59,653 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:57:59,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:57:59,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:57:59,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:57:59,653 INFO L87 Difference]: Start difference. First operand 22728 states and 68416 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:02,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:02,917 INFO L93 Difference]: Finished difference Result 26721 states and 79285 transitions. [2021-06-05 05:58:02,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-06-05 05:58:02,918 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:02,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:02,956 INFO L225 Difference]: With dead ends: 26721 [2021-06-05 05:58:02,956 INFO L226 Difference]: Without dead ends: 26360 [2021-06-05 05:58:02,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1248 ImplicationChecksByTransitivity, 2048.2ms TimeCoverageRelationStatistics Valid=362, Invalid=5188, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:58:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26360 states. [2021-06-05 05:58:03,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26360 to 22740. [2021-06-05 05:58:03,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22740 states, 22739 states have (on average 3.01073046308105) internal successors, (68461), 22739 states have internal predecessors, (68461), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:03,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22740 states to 22740 states and 68461 transitions. [2021-06-05 05:58:03,273 INFO L78 Accepts]: Start accepts. Automaton has 22740 states and 68461 transitions. Word has length 54 [2021-06-05 05:58:03,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:03,273 INFO L482 AbstractCegarLoop]: Abstraction has 22740 states and 68461 transitions. [2021-06-05 05:58:03,273 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:03,273 INFO L276 IsEmpty]: Start isEmpty. Operand 22740 states and 68461 transitions. [2021-06-05 05:58:03,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:03,297 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:03,297 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:03,498 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable232,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:03,498 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:03,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:03,498 INFO L82 PathProgramCache]: Analyzing trace with hash -579117251, now seen corresponding path program 199 times [2021-06-05 05:58:03,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:03,498 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154236139] [2021-06-05 05:58:03,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:03,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:03,946 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:03,946 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:03,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154236139] [2021-06-05 05:58:03,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154236139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:03,946 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1376148445] [2021-06-05 05:58:03,947 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:03,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:03,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:58:03,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:04,213 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:04,213 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 35 treesize of output 15 [2021-06-05 05:58:04,214 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:04,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:04,222 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 05:58:04,222 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-06-05 05:58:04,393 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:04,394 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 29 treesize of output 13 [2021-06-05 05:58:04,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:04,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:04,399 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 05:58:04,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:58:04,554 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:04,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1376148445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:04,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:04,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:58:04,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035909847] [2021-06-05 05:58:04,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:04,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:04,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:04,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:04,555 INFO L87 Difference]: Start difference. First operand 22740 states and 68461 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:07,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:07,634 INFO L93 Difference]: Finished difference Result 26826 states and 79697 transitions. [2021-06-05 05:58:07,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-06-05 05:58:07,634 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:07,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:07,672 INFO L225 Difference]: With dead ends: 26826 [2021-06-05 05:58:07,672 INFO L226 Difference]: Without dead ends: 26465 [2021-06-05 05:58:07,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1061 ImplicationChecksByTransitivity, 2053.3ms TimeCoverageRelationStatistics Valid=330, Invalid=4640, Unknown=0, NotChecked=0, Total=4970 [2021-06-05 05:58:07,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26465 states. [2021-06-05 05:58:07,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26465 to 22744. [2021-06-05 05:58:07,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22744 states, 22743 states have (on average 3.0106846062524735) internal successors, (68472), 22743 states have internal predecessors, (68472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:07,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22744 states to 22744 states and 68472 transitions. [2021-06-05 05:58:07,977 INFO L78 Accepts]: Start accepts. Automaton has 22744 states and 68472 transitions. Word has length 54 [2021-06-05 05:58:07,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:07,977 INFO L482 AbstractCegarLoop]: Abstraction has 22744 states and 68472 transitions. [2021-06-05 05:58:07,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:07,978 INFO L276 IsEmpty]: Start isEmpty. Operand 22744 states and 68472 transitions. [2021-06-05 05:58:07,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:07,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:07,999 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:08,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 05:58:08,200 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:08,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:08,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1512057055, now seen corresponding path program 200 times [2021-06-05 05:58:08,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:08,200 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298710275] [2021-06-05 05:58:08,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:08,551 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:08,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298710275] [2021-06-05 05:58:08,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298710275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:08,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973386754] [2021-06-05 05:58:08,551 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:08,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:08,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:08,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:58:08,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:08,795 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:08,796 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 37 treesize of output 17 [2021-06-05 05:58:08,797 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:08,804 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:08,805 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:08,805 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:51, output treesize:29 [2021-06-05 05:58:08,977 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:08,978 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:58:08,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:08,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:08,983 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 05:58:08,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:58:09,136 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:09,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973386754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:09,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:09,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:58:09,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306633495] [2021-06-05 05:58:09,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:09,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:09,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:09,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:09,137 INFO L87 Difference]: Start difference. First operand 22744 states and 68472 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:12,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:12,541 INFO L93 Difference]: Finished difference Result 27078 states and 80407 transitions. [2021-06-05 05:58:12,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:58:12,542 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:12,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:12,582 INFO L225 Difference]: With dead ends: 27078 [2021-06-05 05:58:12,582 INFO L226 Difference]: Without dead ends: 26752 [2021-06-05 05:58:12,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1385 ImplicationChecksByTransitivity, 2206.9ms TimeCoverageRelationStatistics Valid=389, Invalid=5617, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:58:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26752 states. [2021-06-05 05:58:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26752 to 22756. [2021-06-05 05:58:12,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22756 states, 22755 states have (on average 3.010547132498352) internal successors, (68505), 22755 states have internal predecessors, (68505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22756 states to 22756 states and 68505 transitions. [2021-06-05 05:58:12,895 INFO L78 Accepts]: Start accepts. Automaton has 22756 states and 68505 transitions. Word has length 54 [2021-06-05 05:58:12,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:12,895 INFO L482 AbstractCegarLoop]: Abstraction has 22756 states and 68505 transitions. [2021-06-05 05:58:12,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:12,895 INFO L276 IsEmpty]: Start isEmpty. Operand 22756 states and 68505 transitions. [2021-06-05 05:58:12,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:12,918 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:12,918 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:13,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable234,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:13,119 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:13,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:13,119 INFO L82 PathProgramCache]: Analyzing trace with hash -191601321, now seen corresponding path program 201 times [2021-06-05 05:58:13,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:13,119 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779197818] [2021-06-05 05:58:13,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:13,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:13,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:13,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779197818] [2021-06-05 05:58:13,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779197818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:13,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589372932] [2021-06-05 05:58:13,475 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:13,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:58:13,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:13,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:58:13,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:13,721 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:13,721 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 33 treesize of output 17 [2021-06-05 05:58:13,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:13,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:13,731 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 05:58:13,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:29 [2021-06-05 05:58:13,878 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:13,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:13,879 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 13 [2021-06-05 05:58:13,880 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:13,887 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:13,888 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 05:58:13,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:45, output treesize:13 [2021-06-05 05:58:14,136 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:14,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589372932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:14,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:14,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:58:14,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302298009] [2021-06-05 05:58:14,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:58:14,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:14,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:58:14,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1376, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:58:14,137 INFO L87 Difference]: Start difference. First operand 22756 states and 68505 transitions. Second operand has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:17,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:17,944 INFO L93 Difference]: Finished difference Result 28334 states and 84252 transitions. [2021-06-05 05:58:17,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:58:17,945 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:17,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:17,985 INFO L225 Difference]: With dead ends: 28334 [2021-06-05 05:58:17,986 INFO L226 Difference]: Without dead ends: 28113 [2021-06-05 05:58:17,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1438 ImplicationChecksByTransitivity, 2343.4ms TimeCoverageRelationStatistics Valid=410, Invalid=5752, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:58:18,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28113 states. [2021-06-05 05:58:18,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28113 to 22760. [2021-06-05 05:58:18,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22760 states, 22759 states have (on average 3.0105013401291796) internal successors, (68516), 22759 states have internal predecessors, (68516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:18,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22760 states to 22760 states and 68516 transitions. [2021-06-05 05:58:18,312 INFO L78 Accepts]: Start accepts. Automaton has 22760 states and 68516 transitions. Word has length 54 [2021-06-05 05:58:18,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:18,313 INFO L482 AbstractCegarLoop]: Abstraction has 22760 states and 68516 transitions. [2021-06-05 05:58:18,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:18,313 INFO L276 IsEmpty]: Start isEmpty. Operand 22760 states and 68516 transitions. [2021-06-05 05:58:18,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:18,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:18,335 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:18,536 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 05:58:18,536 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:18,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:18,536 INFO L82 PathProgramCache]: Analyzing trace with hash 1402498875, now seen corresponding path program 202 times [2021-06-05 05:58:18,536 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:18,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754902687] [2021-06-05 05:58:18,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:18,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:18,893 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:18,893 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:18,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754902687] [2021-06-05 05:58:18,894 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754902687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:18,894 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2005901395] [2021-06-05 05:58:18,894 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:18,926 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:18,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:18,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:58:18,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:19,138 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:19,138 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 35 treesize of output 15 [2021-06-05 05:58:19,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:19,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:19,147 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 05:58:19,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:25 [2021-06-05 05:58:19,282 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:19,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-06-05 05:58:19,283 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:19,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:19,289 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 05:58:19,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:58:19,474 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:19,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2005901395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:19,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:19,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:58:19,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562121199] [2021-06-05 05:58:19,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:19,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:19,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:19,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1238, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:19,475 INFO L87 Difference]: Start difference. First operand 22760 states and 68516 transitions. Second operand has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:23,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:23,048 INFO L93 Difference]: Finished difference Result 29140 states and 86428 transitions. [2021-06-05 05:58:23,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-06-05 05:58:23,048 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:23,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:23,091 INFO L225 Difference]: With dead ends: 29140 [2021-06-05 05:58:23,091 INFO L226 Difference]: Without dead ends: 28954 [2021-06-05 05:58:23,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2212.5ms TimeCoverageRelationStatistics Valid=391, Invalid=5771, Unknown=0, NotChecked=0, Total=6162 [2021-06-05 05:58:23,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28954 states. [2021-06-05 05:58:23,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28954 to 22772. [2021-06-05 05:58:23,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22772 states, 22771 states have (on average 3.0101883975231654) internal successors, (68545), 22771 states have internal predecessors, (68545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:23,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22772 states to 22772 states and 68545 transitions. [2021-06-05 05:58:23,486 INFO L78 Accepts]: Start accepts. Automaton has 22772 states and 68545 transitions. Word has length 54 [2021-06-05 05:58:23,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:23,487 INFO L482 AbstractCegarLoop]: Abstraction has 22772 states and 68545 transitions. [2021-06-05 05:58:23,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 36 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:23,487 INFO L276 IsEmpty]: Start isEmpty. Operand 22772 states and 68545 transitions. [2021-06-05 05:58:23,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:23,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:23,509 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:23,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2021-06-05 05:58:23,710 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:23,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:23,711 INFO L82 PathProgramCache]: Analyzing trace with hash 1232106971, now seen corresponding path program 203 times [2021-06-05 05:58:23,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:23,711 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682804031] [2021-06-05 05:58:23,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:23,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:24,141 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:58:24,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:24,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682804031] [2021-06-05 05:58:24,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682804031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:24,142 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016822570] [2021-06-05 05:58:24,142 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:24,174 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:58:24,174 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:24,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:58:24,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:24,502 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:24,502 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 29 treesize of output 17 [2021-06-05 05:58:24,503 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:24,510 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:24,511 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 05:58:24,511 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:58:24,582 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:24,582 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 05:58:24,583 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:24,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:24,589 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 05:58:24,589 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 05:58:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:24,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016822570] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:24,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:24,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 05:58:24,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541921899] [2021-06-05 05:58:24,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:58:24,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:24,792 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:58:24,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:58:24,793 INFO L87 Difference]: Start difference. First operand 22772 states and 68545 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:26,602 INFO L93 Difference]: Finished difference Result 24154 states and 72280 transitions. [2021-06-05 05:58:26,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:58:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:26,633 INFO L225 Difference]: With dead ends: 24154 [2021-06-05 05:58:26,633 INFO L226 Difference]: Without dead ends: 23911 [2021-06-05 05:58:26,633 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1504.0ms TimeCoverageRelationStatistics Valid=266, Invalid=3394, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:58:26,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23911 states. [2021-06-05 05:58:26,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23911 to 22913. [2021-06-05 05:58:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22913 states, 22912 states have (on average 3.0077688547486034) internal successors, (68914), 22912 states have internal predecessors, (68914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:26,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22913 states to 22913 states and 68914 transitions. [2021-06-05 05:58:26,958 INFO L78 Accepts]: Start accepts. Automaton has 22913 states and 68914 transitions. Word has length 54 [2021-06-05 05:58:26,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:26,958 INFO L482 AbstractCegarLoop]: Abstraction has 22913 states and 68914 transitions. [2021-06-05 05:58:26,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:26,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22913 states and 68914 transitions. [2021-06-05 05:58:26,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:26,981 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:26,981 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:27,182 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:27,182 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash 512105653, now seen corresponding path program 204 times [2021-06-05 05:58:27,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:27,182 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489690782] [2021-06-05 05:58:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:27,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:27,580 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:27,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489690782] [2021-06-05 05:58:27,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489690782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:27,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598181226] [2021-06-05 05:58:27,580 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:27,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:58:27,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:27,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:58:27,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:28,067 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:28,068 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:28,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 05:58:28,069 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:28,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:28,080 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 05:58:28,080 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:57, output treesize:27 [2021-06-05 05:58:28,149 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:28,149 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 05:58:28,150 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:28,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:28,155 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 05:58:28,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:58:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:28,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598181226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:28,359 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:28,359 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 23] total 40 [2021-06-05 05:58:28,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144487745] [2021-06-05 05:58:28,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 41 states [2021-06-05 05:58:28,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:28,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-06-05 05:58:28,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 05:58:28,360 INFO L87 Difference]: Start difference. First operand 22913 states and 68914 transitions. Second operand has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:30,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:30,995 INFO L93 Difference]: Finished difference Result 24297 states and 72649 transitions. [2021-06-05 05:58:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:58:30,995 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:30,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:31,024 INFO L225 Difference]: With dead ends: 24297 [2021-06-05 05:58:31,025 INFO L226 Difference]: Without dead ends: 23787 [2021-06-05 05:58:31,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 34 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2234.9ms TimeCoverageRelationStatistics Valid=430, Invalid=5576, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:58:31,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23787 states. [2021-06-05 05:58:31,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23787 to 22858. [2021-06-05 05:58:31,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22858 states, 22857 states have (on average 3.008575053594085) internal successors, (68767), 22857 states have internal predecessors, (68767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:31,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22858 states to 22858 states and 68767 transitions. [2021-06-05 05:58:31,321 INFO L78 Accepts]: Start accepts. Automaton has 22858 states and 68767 transitions. Word has length 54 [2021-06-05 05:58:31,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:31,321 INFO L482 AbstractCegarLoop]: Abstraction has 22858 states and 68767 transitions. [2021-06-05 05:58:31,321 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 41 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:31,321 INFO L276 IsEmpty]: Start isEmpty. Operand 22858 states and 68767 transitions. [2021-06-05 05:58:31,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:31,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:31,345 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:31,546 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2021-06-05 05:58:31,546 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:31,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:31,546 INFO L82 PathProgramCache]: Analyzing trace with hash 758945979, now seen corresponding path program 205 times [2021-06-05 05:58:31,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:31,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137648892] [2021-06-05 05:58:31,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:31,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:31,982 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:58:31,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:31,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137648892] [2021-06-05 05:58:31,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137648892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:31,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118218985] [2021-06-05 05:58:31,983 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:32,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:32,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:58:32,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:32,302 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:32,302 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 33 treesize of output 17 [2021-06-05 05:58:32,303 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:32,311 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:32,312 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:32,312 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:58:32,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:32,418 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 05:58:32,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:32,423 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:32,424 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 05:58:32,424 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:58:32,570 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:32,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118218985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:32,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:32,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:58:32,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268055932] [2021-06-05 05:58:32,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:58:32,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:32,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:58:32,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:58:32,571 INFO L87 Difference]: Start difference. First operand 22858 states and 68767 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:34,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:34,518 INFO L93 Difference]: Finished difference Result 24134 states and 72227 transitions. [2021-06-05 05:58:34,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 05:58:34,519 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:34,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:34,552 INFO L225 Difference]: With dead ends: 24134 [2021-06-05 05:58:34,552 INFO L226 Difference]: Without dead ends: 23796 [2021-06-05 05:58:34,552 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 722 ImplicationChecksByTransitivity, 1511.1ms TimeCoverageRelationStatistics Valid=256, Invalid=3284, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:58:34,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23796 states. [2021-06-05 05:58:34,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23796 to 22923. [2021-06-05 05:58:34,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22923 states, 22922 states have (on average 3.0078963441235493) internal successors, (68947), 22922 states have internal predecessors, (68947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22923 states to 22923 states and 68947 transitions. [2021-06-05 05:58:34,847 INFO L78 Accepts]: Start accepts. Automaton has 22923 states and 68947 transitions. Word has length 54 [2021-06-05 05:58:34,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:34,847 INFO L482 AbstractCegarLoop]: Abstraction has 22923 states and 68947 transitions. [2021-06-05 05:58:34,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:34,847 INFO L276 IsEmpty]: Start isEmpty. Operand 22923 states and 68947 transitions. [2021-06-05 05:58:34,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:34,870 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:34,870 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:35,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2021-06-05 05:58:35,070 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:35,071 INFO L82 PathProgramCache]: Analyzing trace with hash -144168893, now seen corresponding path program 206 times [2021-06-05 05:58:35,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:35,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895841887] [2021-06-05 05:58:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:58:35,481 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:35,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895841887] [2021-06-05 05:58:35,481 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895841887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:35,481 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591630644] [2021-06-05 05:58:35,481 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:35,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:58:35,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:35,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:58:35,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:35,798 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:35,798 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 33 treesize of output 17 [2021-06-05 05:58:35,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:35,807 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:35,808 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 05:58:35,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:58:35,979 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:35,979 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 05:58:35,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:35,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:35,985 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 05:58:35,985 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:58:36,137 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:36,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [591630644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:36,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:36,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 05:58:36,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519144635] [2021-06-05 05:58:36,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:58:36,138 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:36,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:58:36,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:58:36,138 INFO L87 Difference]: Start difference. First operand 22923 states and 68947 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:38,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:38,269 INFO L93 Difference]: Finished difference Result 24157 states and 72284 transitions. [2021-06-05 05:58:38,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:58:38,269 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:38,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:38,300 INFO L225 Difference]: With dead ends: 24157 [2021-06-05 05:58:38,300 INFO L226 Difference]: Without dead ends: 23776 [2021-06-05 05:58:38,301 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 1620.5ms TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:58:38,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23776 states. [2021-06-05 05:58:38,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23776 to 22923. [2021-06-05 05:58:38,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22923 states, 22922 states have (on average 3.007198324753512) internal successors, (68931), 22922 states have internal predecessors, (68931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22923 states to 22923 states and 68931 transitions. [2021-06-05 05:58:38,598 INFO L78 Accepts]: Start accepts. Automaton has 22923 states and 68931 transitions. Word has length 54 [2021-06-05 05:58:38,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:38,599 INFO L482 AbstractCegarLoop]: Abstraction has 22923 states and 68931 transitions. [2021-06-05 05:58:38,599 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:38,599 INFO L276 IsEmpty]: Start isEmpty. Operand 22923 states and 68931 transitions. [2021-06-05 05:58:38,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:38,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:38,621 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:38,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:38,822 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:38,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:38,822 INFO L82 PathProgramCache]: Analyzing trace with hash 517704065, now seen corresponding path program 207 times [2021-06-05 05:58:38,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:38,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295352001] [2021-06-05 05:58:38,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:38,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:39,304 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 5 [2021-06-05 05:58:39,371 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:58:39,371 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:39,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295352001] [2021-06-05 05:58:39,371 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295352001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:39,371 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040719384] [2021-06-05 05:58:39,371 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:39,403 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:58:39,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:39,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:58:39,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:39,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:39,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:39,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 05:58:39,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:39,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:39,774 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 05:58:39,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:55, output treesize:25 [2021-06-05 05:58:39,914 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:39,914 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 05:58:39,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:39,919 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:39,920 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 05:58:39,920 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:58:40,066 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:40,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2040719384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:40,066 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:40,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 39 [2021-06-05 05:58:40,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285907266] [2021-06-05 05:58:40,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:58:40,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:40,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:58:40,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=1448, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:58:40,067 INFO L87 Difference]: Start difference. First operand 22923 states and 68931 transitions. Second operand has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:42,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:42,663 INFO L93 Difference]: Finished difference Result 24164 states and 72300 transitions. [2021-06-05 05:58:42,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-06-05 05:58:42,664 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:42,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:42,695 INFO L225 Difference]: With dead ends: 24164 [2021-06-05 05:58:42,695 INFO L226 Difference]: Without dead ends: 23826 [2021-06-05 05:58:42,695 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 3 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1473 ImplicationChecksByTransitivity, 2389.0ms TimeCoverageRelationStatistics Valid=428, Invalid=5578, Unknown=0, NotChecked=0, Total=6006 [2021-06-05 05:58:42,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23826 states. [2021-06-05 05:58:42,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23826 to 22879. [2021-06-05 05:58:42,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22879 states, 22878 states have (on average 3.008392341987936) internal successors, (68826), 22878 states have internal predecessors, (68826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:42,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22879 states to 22879 states and 68826 transitions. [2021-06-05 05:58:42,992 INFO L78 Accepts]: Start accepts. Automaton has 22879 states and 68826 transitions. Word has length 54 [2021-06-05 05:58:42,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:42,992 INFO L482 AbstractCegarLoop]: Abstraction has 22879 states and 68826 transitions. [2021-06-05 05:58:42,992 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.475) internal successors, (99), 39 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:42,992 INFO L276 IsEmpty]: Start isEmpty. Operand 22879 states and 68826 transitions. [2021-06-05 05:58:43,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:43,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:43,016 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:43,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:43,216 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:43,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:43,217 INFO L82 PathProgramCache]: Analyzing trace with hash -385410807, now seen corresponding path program 208 times [2021-06-05 05:58:43,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:43,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1639359262] [2021-06-05 05:58:43,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:43,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:43,634 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:58:43,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:43,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1639359262] [2021-06-05 05:58:43,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1639359262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:43,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132097433] [2021-06-05 05:58:43,634 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:43,666 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:58:43,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:43,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:58:43,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:43,916 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:43,917 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 31 treesize of output 15 [2021-06-05 05:58:43,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:43,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:43,928 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 05:58:43,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:23 [2021-06-05 05:58:44,065 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:44,065 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:58:44,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:44,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:44,071 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 05:58:44,071 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:58:44,219 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:44,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132097433] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:44,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:44,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:58:44,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917304746] [2021-06-05 05:58:44,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:58:44,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:44,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:58:44,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:58:44,220 INFO L87 Difference]: Start difference. First operand 22879 states and 68826 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:46,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:46,495 INFO L93 Difference]: Finished difference Result 24097 states and 72135 transitions. [2021-06-05 05:58:46,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:58:46,496 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:46,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:46,528 INFO L225 Difference]: With dead ends: 24097 [2021-06-05 05:58:46,528 INFO L226 Difference]: Without dead ends: 23732 [2021-06-05 05:58:46,529 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 1576.1ms TimeCoverageRelationStatistics Valid=270, Invalid=3512, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:58:46,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23732 states. [2021-06-05 05:58:46,761 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23732 to 22843. [2021-06-05 05:58:46,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22843 states, 22842 states have (on average 3.009675159793363) internal successors, (68747), 22842 states have internal predecessors, (68747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:46,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22843 states to 22843 states and 68747 transitions. [2021-06-05 05:58:46,825 INFO L78 Accepts]: Start accepts. Automaton has 22843 states and 68747 transitions. Word has length 54 [2021-06-05 05:58:46,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:46,825 INFO L482 AbstractCegarLoop]: Abstraction has 22843 states and 68747 transitions. [2021-06-05 05:58:46,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:46,825 INFO L276 IsEmpty]: Start isEmpty. Operand 22843 states and 68747 transitions. [2021-06-05 05:58:46,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:46,847 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:46,847 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:47,047 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:47,048 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:47,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:47,048 INFO L82 PathProgramCache]: Analyzing trace with hash 1690364315, now seen corresponding path program 209 times [2021-06-05 05:58:47,048 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:47,048 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884637067] [2021-06-05 05:58:47,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:47,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:47,443 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:58:47,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:47,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884637067] [2021-06-05 05:58:47,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884637067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:47,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716092372] [2021-06-05 05:58:47,443 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:47,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:58:47,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:47,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:58:47,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:47,728 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:58:47,728 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 27 treesize of output 15 [2021-06-05 05:58:47,729 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:47,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:47,737 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 05:58:47,737 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:58:47,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:47,902 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:47,903 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:47,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 05:58:47,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:47,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:47,912 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 05:58:47,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-06-05 05:58:48,125 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:58:48,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716092372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:48,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:48,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 05:58:48,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258536811] [2021-06-05 05:58:48,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:58:48,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:48,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:58:48,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1446, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:58:48,126 INFO L87 Difference]: Start difference. First operand 22843 states and 68747 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:50,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:50,513 INFO L93 Difference]: Finished difference Result 24093 states and 72124 transitions. [2021-06-05 05:58:50,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 05:58:50,513 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:50,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:50,544 INFO L225 Difference]: With dead ends: 24093 [2021-06-05 05:58:50,545 INFO L226 Difference]: Without dead ends: 23872 [2021-06-05 05:58:50,545 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 1793.7ms TimeCoverageRelationStatistics Valid=309, Invalid=4247, Unknown=0, NotChecked=0, Total=4556 [2021-06-05 05:58:50,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23872 states. [2021-06-05 05:58:50,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23872 to 23024. [2021-06-05 05:58:50,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23024 states, 23023 states have (on average 3.0053859184293965) internal successors, (69193), 23023 states have internal predecessors, (69193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:50,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23024 states to 23024 states and 69193 transitions. [2021-06-05 05:58:50,841 INFO L78 Accepts]: Start accepts. Automaton has 23024 states and 69193 transitions. Word has length 54 [2021-06-05 05:58:50,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:50,841 INFO L482 AbstractCegarLoop]: Abstraction has 23024 states and 69193 transitions. [2021-06-05 05:58:50,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:50,841 INFO L276 IsEmpty]: Start isEmpty. Operand 23024 states and 69193 transitions. [2021-06-05 05:58:50,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:50,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:50,865 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:51,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2021-06-05 05:58:51,065 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:51,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:51,065 INFO L82 PathProgramCache]: Analyzing trace with hash 2108887361, now seen corresponding path program 210 times [2021-06-05 05:58:51,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:51,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734685363] [2021-06-05 05:58:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:51,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:51,423 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:51,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734685363] [2021-06-05 05:58:51,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734685363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:51,423 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1507593916] [2021-06-05 05:58:51,423 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:51,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:58:51,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:58:51,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 58 conjunts are in the unsatisfiable core [2021-06-05 05:58:51,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:51,811 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:51,812 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:51,813 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:58:51,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 15 [2021-06-05 05:58:51,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:51,824 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:51,825 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 05:58:51,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:53, output treesize:23 [2021-06-05 05:58:52,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:58:52,069 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-06-05 05:58:52,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 23 [2021-06-05 05:58:52,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:52,079 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:52,081 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 05:58:52,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:31 [2021-06-05 05:58:52,381 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:52,381 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1507593916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:52,381 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:52,381 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 25] total 42 [2021-06-05 05:58:52,381 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829490751] [2021-06-05 05:58:52,381 INFO L462 AbstractCegarLoop]: Interpolant automaton has 43 states [2021-06-05 05:58:52,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:52,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-06-05 05:58:52,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1692, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 05:58:52,382 INFO L87 Difference]: Start difference. First operand 23024 states and 69193 transitions. Second operand has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:56,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:58:56,508 INFO L93 Difference]: Finished difference Result 24516 states and 73171 transitions. [2021-06-05 05:58:56,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 05:58:56,509 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:58:56,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:58:56,541 INFO L225 Difference]: With dead ends: 24516 [2021-06-05 05:58:56,541 INFO L226 Difference]: Without dead ends: 23907 [2021-06-05 05:58:56,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2126 ImplicationChecksByTransitivity, 3374.2ms TimeCoverageRelationStatistics Valid=560, Invalid=8370, Unknown=0, NotChecked=0, Total=8930 [2021-06-05 05:58:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23907 states. [2021-06-05 05:58:56,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23907 to 23007. [2021-06-05 05:58:56,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23007 states, 23006 states have (on average 3.005737633660784) internal successors, (69150), 23006 states have internal predecessors, (69150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:56,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23007 states to 23007 states and 69150 transitions. [2021-06-05 05:58:56,913 INFO L78 Accepts]: Start accepts. Automaton has 23007 states and 69150 transitions. Word has length 54 [2021-06-05 05:58:56,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:58:56,913 INFO L482 AbstractCegarLoop]: Abstraction has 23007 states and 69150 transitions. [2021-06-05 05:58:56,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 43 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:58:56,913 INFO L276 IsEmpty]: Start isEmpty. Operand 23007 states and 69150 transitions. [2021-06-05 05:58:56,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:58:56,936 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:58:56,936 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:58:57,136 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:57,137 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:58:57,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:58:57,137 INFO L82 PathProgramCache]: Analyzing trace with hash 1907398291, now seen corresponding path program 211 times [2021-06-05 05:58:57,137 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:58:57,137 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927155201] [2021-06-05 05:58:57,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:58:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:57,489 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:57,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:58:57,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927155201] [2021-06-05 05:58:57,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927155201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:57,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32217428] [2021-06-05 05:58:57,490 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:58:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:58:57,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 52 conjunts are in the unsatisfiable core [2021-06-05 05:58:57,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:58:57,785 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:57,785 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 33 treesize of output 17 [2021-06-05 05:58:57,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:57,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:57,794 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:58:57,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:47, output treesize:25 [2021-06-05 05:58:57,935 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:58:57,935 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 29 treesize of output 13 [2021-06-05 05:58:57,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:58:57,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:58:57,941 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 05:58:57,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:58:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:58:58,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32217428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:58:58,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:58:58,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 20] total 36 [2021-06-05 05:58:58,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495733858] [2021-06-05 05:58:58,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 37 states [2021-06-05 05:58:58,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:58:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-06-05 05:58:58,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=1236, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:58:58,083 INFO L87 Difference]: Start difference. First operand 23007 states and 69150 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:00,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:00,195 INFO L93 Difference]: Finished difference Result 24268 states and 72546 transitions. [2021-06-05 05:59:00,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:59:00,196 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:00,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:00,227 INFO L225 Difference]: With dead ends: 24268 [2021-06-05 05:59:00,227 INFO L226 Difference]: Without dead ends: 24040 [2021-06-05 05:59:00,228 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1430.1ms TimeCoverageRelationStatistics Valid=251, Invalid=3289, Unknown=0, NotChecked=0, Total=3540 [2021-06-05 05:59:00,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24040 states. [2021-06-05 05:59:00,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24040 to 22935. [2021-06-05 05:59:00,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22935 states, 22934 states have (on average 3.007586988750327) internal successors, (68976), 22934 states have internal predecessors, (68976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:00,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22935 states to 22935 states and 68976 transitions. [2021-06-05 05:59:00,516 INFO L78 Accepts]: Start accepts. Automaton has 22935 states and 68976 transitions. Word has length 54 [2021-06-05 05:59:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:00,516 INFO L482 AbstractCegarLoop]: Abstraction has 22935 states and 68976 transitions. [2021-06-05 05:59:00,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 36 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:00,517 INFO L276 IsEmpty]: Start isEmpty. Operand 22935 states and 68976 transitions. [2021-06-05 05:59:00,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:00,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:00,538 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:00,738 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable247 [2021-06-05 05:59:00,738 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:00,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:00,739 INFO L82 PathProgramCache]: Analyzing trace with hash -25591803, now seen corresponding path program 212 times [2021-06-05 05:59:00,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:00,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623985786] [2021-06-05 05:59:00,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:00,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:01,170 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:01,170 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623985786] [2021-06-05 05:59:01,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1623985786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:01,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054770936] [2021-06-05 05:59:01,170 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:01,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:59:01,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:01,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:01,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:01,528 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:59:01,528 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 33 treesize of output 17 [2021-06-05 05:59:01,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:01,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:01,537 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 05:59:01,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:59:01,607 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:01,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 05:59:01,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:01,612 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:01,613 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 05:59:01,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:01,760 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:01,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054770936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:01,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:01,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:01,761 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356711713] [2021-06-05 05:59:01,761 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:01,761 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:01,761 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:01,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:01,761 INFO L87 Difference]: Start difference. First operand 22935 states and 68976 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:04,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:04,125 INFO L93 Difference]: Finished difference Result 24564 states and 73353 transitions. [2021-06-05 05:59:04,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:59:04,125 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:04,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:04,157 INFO L225 Difference]: With dead ends: 24564 [2021-06-05 05:59:04,157 INFO L226 Difference]: Without dead ends: 24178 [2021-06-05 05:59:04,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1553.2ms TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:59:04,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24178 states. [2021-06-05 05:59:04,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24178 to 23011. [2021-06-05 05:59:04,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23011 states, 23010 states have (on average 3.0066927422859626) internal successors, (69184), 23010 states have internal predecessors, (69184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:04,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23011 states to 23011 states and 69184 transitions. [2021-06-05 05:59:04,449 INFO L78 Accepts]: Start accepts. Automaton has 23011 states and 69184 transitions. Word has length 54 [2021-06-05 05:59:04,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:04,449 INFO L482 AbstractCegarLoop]: Abstraction has 23011 states and 69184 transitions. [2021-06-05 05:59:04,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:04,449 INFO L276 IsEmpty]: Start isEmpty. Operand 23011 states and 69184 transitions. [2021-06-05 05:59:04,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:04,471 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:04,471 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:04,671 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 05:59:04,672 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:04,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:04,672 INFO L82 PathProgramCache]: Analyzing trace with hash -498752795, now seen corresponding path program 213 times [2021-06-05 05:59:04,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:04,672 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298093492] [2021-06-05 05:59:04,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:04,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:05,108 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:05,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:05,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298093492] [2021-06-05 05:59:05,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298093492] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:05,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631134657] [2021-06-05 05:59:05,109 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:05,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:59:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:05,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:59:05,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:05,430 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:05,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:59:05,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:05,440 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:05,440 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 05:59:05,440 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 05:59:05,546 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:05,546 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 05:59:05,547 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:05,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:05,552 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 05:59:05,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:05,697 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:05,698 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1631134657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:05,698 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:05,698 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:05,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210841494] [2021-06-05 05:59:05,698 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:05,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:05,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:05,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:05,698 INFO L87 Difference]: Start difference. First operand 23011 states and 69184 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:07,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:07,777 INFO L93 Difference]: Finished difference Result 24520 states and 73232 transitions. [2021-06-05 05:59:07,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:59:07,778 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:07,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:07,810 INFO L225 Difference]: With dead ends: 24520 [2021-06-05 05:59:07,810 INFO L226 Difference]: Without dead ends: 24182 [2021-06-05 05:59:07,810 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1543.0ms TimeCoverageRelationStatistics Valid=260, Invalid=3400, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:59:07,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24182 states. [2021-06-05 05:59:08,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24182 to 22995. [2021-06-05 05:59:08,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22995 states, 22994 states have (on average 3.0075671914412454) internal successors, (69156), 22994 states have internal predecessors, (69156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:08,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22995 states to 22995 states and 69156 transitions. [2021-06-05 05:59:08,104 INFO L78 Accepts]: Start accepts. Automaton has 22995 states and 69156 transitions. Word has length 54 [2021-06-05 05:59:08,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:08,104 INFO L482 AbstractCegarLoop]: Abstraction has 22995 states and 69156 transitions. [2021-06-05 05:59:08,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:08,104 INFO L276 IsEmpty]: Start isEmpty. Operand 22995 states and 69156 transitions. [2021-06-05 05:59:08,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:08,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:08,126 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:08,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable249,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:08,327 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:08,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:08,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1401867667, now seen corresponding path program 214 times [2021-06-05 05:59:08,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:08,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367945062] [2021-06-05 05:59:08,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:08,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:08,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:08,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367945062] [2021-06-05 05:59:08,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367945062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:08,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1072551754] [2021-06-05 05:59:08,845 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:08,876 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:59:08,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:08,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:08,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:09,165 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:59:09,166 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 33 treesize of output 17 [2021-06-05 05:59:09,166 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:09,175 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:09,175 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 05:59:09,175 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:59:09,281 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:09,282 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 05:59:09,282 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:09,287 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:09,287 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:09,287 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:09,435 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:09,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1072551754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:09,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:09,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:09,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841409615] [2021-06-05 05:59:09,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:09,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:09,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:09,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:09,436 INFO L87 Difference]: Start difference. First operand 22995 states and 69156 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:11,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:11,907 INFO L93 Difference]: Finished difference Result 24543 states and 73289 transitions. [2021-06-05 05:59:11,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:59:11,907 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:11,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:11,938 INFO L225 Difference]: With dead ends: 24543 [2021-06-05 05:59:11,938 INFO L226 Difference]: Without dead ends: 24162 [2021-06-05 05:59:11,939 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1684.4ms TimeCoverageRelationStatistics Valid=261, Invalid=3521, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:59:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24162 states. [2021-06-05 05:59:12,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24162 to 22995. [2021-06-05 05:59:12,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22995 states, 22994 states have (on average 3.006871357745499) internal successors, (69140), 22994 states have internal predecessors, (69140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:12,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22995 states to 22995 states and 69140 transitions. [2021-06-05 05:59:12,232 INFO L78 Accepts]: Start accepts. Automaton has 22995 states and 69140 transitions. Word has length 54 [2021-06-05 05:59:12,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:12,232 INFO L482 AbstractCegarLoop]: Abstraction has 22995 states and 69140 transitions. [2021-06-05 05:59:12,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:12,232 INFO L276 IsEmpty]: Start isEmpty. Operand 22995 states and 69140 transitions. [2021-06-05 05:59:12,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:12,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:12,254 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:12,454 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,219 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:12,455 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:12,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:12,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1690028495, now seen corresponding path program 215 times [2021-06-05 05:59:12,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:12,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190078965] [2021-06-05 05:59:12,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:12,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:12,879 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:12,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:12,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190078965] [2021-06-05 05:59:12,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190078965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:12,880 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430540759] [2021-06-05 05:59:12,880 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:12,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:59:12,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:12,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:59:12,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:13,053 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 18 [2021-06-05 05:59:13,295 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:13,295 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 29 treesize of output 17 [2021-06-05 05:59:13,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:13,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:13,304 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 05:59:13,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:25 [2021-06-05 05:59:13,440 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:13,440 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 05:59:13,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:13,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:13,447 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 05:59:13,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-06-05 05:59:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:13,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430540759] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:13,643 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:13,643 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 05:59:13,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499868659] [2021-06-05 05:59:13,644 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 05:59:13,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:13,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 05:59:13,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1441, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 05:59:13,644 INFO L87 Difference]: Start difference. First operand 22995 states and 69140 transitions. Second operand has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:15,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:15,988 INFO L93 Difference]: Finished difference Result 24612 states and 73461 transitions. [2021-06-05 05:59:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:59:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:16,021 INFO L225 Difference]: With dead ends: 24612 [2021-06-05 05:59:16,021 INFO L226 Difference]: Without dead ends: 24369 [2021-06-05 05:59:16,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1550.0ms TimeCoverageRelationStatistics Valid=285, Invalid=3621, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:59:16,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24369 states. [2021-06-05 05:59:16,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24369 to 23023. [2021-06-05 05:59:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23023 states, 23022 states have (on average 3.0063851967683086) internal successors, (69213), 23022 states have internal predecessors, (69213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:16,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23023 states to 23023 states and 69213 transitions. [2021-06-05 05:59:16,329 INFO L78 Accepts]: Start accepts. Automaton has 23023 states and 69213 transitions. Word has length 54 [2021-06-05 05:59:16,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:16,329 INFO L482 AbstractCegarLoop]: Abstraction has 23023 states and 69213 transitions. [2021-06-05 05:59:16,329 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.4) internal successors, (96), 39 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:16,330 INFO L276 IsEmpty]: Start isEmpty. Operand 23023 states and 69213 transitions. [2021-06-05 05:59:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:16,351 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:16,351 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:16,551 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable251,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:16,551 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:16,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:16,551 INFO L82 PathProgramCache]: Analyzing trace with hash 970027177, now seen corresponding path program 216 times [2021-06-05 05:59:16,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:16,552 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654474235] [2021-06-05 05:59:16,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:16,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:16,965 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:16,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:16,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654474235] [2021-06-05 05:59:16,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654474235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:16,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015654045] [2021-06-05 05:59:16,966 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:16,997 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:59:16,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:16,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:16,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:17,242 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:17,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 15 [2021-06-05 05:59:17,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:17,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:17,251 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 05:59:17,251 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:23 [2021-06-05 05:59:17,382 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:17,382 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 05:59:17,383 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:17,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:17,388 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 05:59:17,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:17,583 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 38 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:59:17,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1015654045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:17,584 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:17,584 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 38 [2021-06-05 05:59:17,584 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508307124] [2021-06-05 05:59:17,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 05:59:17,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:17,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 05:59:17,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 05:59:17,584 INFO L87 Difference]: Start difference. First operand 23023 states and 69213 transitions. Second operand has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:19,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:19,864 INFO L93 Difference]: Finished difference Result 24507 states and 73192 transitions. [2021-06-05 05:59:19,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:59:19,865 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:19,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:19,896 INFO L225 Difference]: With dead ends: 24507 [2021-06-05 05:59:19,896 INFO L226 Difference]: Without dead ends: 24217 [2021-06-05 05:59:19,897 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1586.9ms TimeCoverageRelationStatistics Valid=293, Invalid=3739, Unknown=0, NotChecked=0, Total=4032 [2021-06-05 05:59:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24217 states. [2021-06-05 05:59:20,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24217 to 22999. [2021-06-05 05:59:20,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22999 states, 22998 states have (on average 3.0068266805809203) internal successors, (69151), 22998 states have internal predecessors, (69151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:20,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22999 states to 22999 states and 69151 transitions. [2021-06-05 05:59:20,192 INFO L78 Accepts]: Start accepts. Automaton has 22999 states and 69151 transitions. Word has length 54 [2021-06-05 05:59:20,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:20,192 INFO L482 AbstractCegarLoop]: Abstraction has 22999 states and 69151 transitions. [2021-06-05 05:59:20,193 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.4615384615384617) internal successors, (96), 38 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:20,193 INFO L276 IsEmpty]: Start isEmpty. Operand 22999 states and 69151 transitions. [2021-06-05 05:59:20,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:20,214 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:20,214 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:20,415 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:20,415 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:20,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:20,415 INFO L82 PathProgramCache]: Analyzing trace with hash 786913623, now seen corresponding path program 217 times [2021-06-05 05:59:20,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:20,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129017579] [2021-06-05 05:59:20,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:20,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:20,809 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:20,809 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:20,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129017579] [2021-06-05 05:59:20,809 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129017579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:20,809 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138880958] [2021-06-05 05:59:20,809 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:20,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:20,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:20,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:21,087 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:59:21,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:59:21,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:21,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:21,096 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 05:59:21,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:59:21,235 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:21,235 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 05:59:21,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:21,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:21,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:21,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:21,388 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:21,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [138880958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:21,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:21,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:21,389 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984429776] [2021-06-05 05:59:21,389 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:21,389 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:21,389 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:21,389 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:21,389 INFO L87 Difference]: Start difference. First operand 22999 states and 69151 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:23,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:23,510 INFO L93 Difference]: Finished difference Result 24527 states and 73245 transitions. [2021-06-05 05:59:23,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 05:59:23,510 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:23,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:23,542 INFO L225 Difference]: With dead ends: 24527 [2021-06-05 05:59:23,543 INFO L226 Difference]: Without dead ends: 24162 [2021-06-05 05:59:23,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 789 ImplicationChecksByTransitivity, 1598.9ms TimeCoverageRelationStatistics Valid=278, Invalid=3628, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 05:59:23,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24162 states. [2021-06-05 05:59:23,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24162 to 22967. [2021-06-05 05:59:23,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22967 states, 22966 states have (on average 3.00788121571018) internal successors, (69079), 22966 states have internal predecessors, (69079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:23,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22967 states to 22967 states and 69079 transitions. [2021-06-05 05:59:23,837 INFO L78 Accepts]: Start accepts. Automaton has 22967 states and 69079 transitions. Word has length 54 [2021-06-05 05:59:23,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:23,837 INFO L482 AbstractCegarLoop]: Abstraction has 22967 states and 69079 transitions. [2021-06-05 05:59:23,838 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:23,838 INFO L276 IsEmpty]: Start isEmpty. Operand 22967 states and 69079 transitions. [2021-06-05 05:59:23,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:23,860 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:23,860 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:24,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,222 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:24,065 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:24,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:24,065 INFO L82 PathProgramCache]: Analyzing trace with hash -1432278551, now seen corresponding path program 218 times [2021-06-05 05:59:24,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:24,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448158328] [2021-06-05 05:59:24,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:24,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:24,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:24,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448158328] [2021-06-05 05:59:24,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448158328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:24,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811865456] [2021-06-05 05:59:24,452 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:24,483 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:59:24,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:24,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:24,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:24,741 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:59:24,741 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 33 treesize of output 17 [2021-06-05 05:59:24,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:24,749 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:24,750 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 05:59:24,750 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:47, output treesize:25 [2021-06-05 05:59:24,886 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:24,887 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 05:59:24,887 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:24,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:24,892 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:24,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:25,042 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:25,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811865456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:25,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:25,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:25,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073485714] [2021-06-05 05:59:25,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:25,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:25,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:25,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:25,043 INFO L87 Difference]: Start difference. First operand 22967 states and 69079 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:27,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:27,616 INFO L93 Difference]: Finished difference Result 24875 states and 74108 transitions. [2021-06-05 05:59:27,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 05:59:27,616 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:27,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:27,648 INFO L225 Difference]: With dead ends: 24875 [2021-06-05 05:59:27,648 INFO L226 Difference]: Without dead ends: 24514 [2021-06-05 05:59:27,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1677.1ms TimeCoverageRelationStatistics Valid=285, Invalid=3875, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 05:59:27,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24514 states. [2021-06-05 05:59:27,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24514 to 22947. [2021-06-05 05:59:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22947 states, 22946 states have (on average 3.00810598797176) internal successors, (69024), 22946 states have internal predecessors, (69024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:27,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22947 states to 22947 states and 69024 transitions. [2021-06-05 05:59:27,942 INFO L78 Accepts]: Start accepts. Automaton has 22947 states and 69024 transitions. Word has length 54 [2021-06-05 05:59:27,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:27,942 INFO L482 AbstractCegarLoop]: Abstraction has 22947 states and 69024 transitions. [2021-06-05 05:59:27,942 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:27,942 INFO L276 IsEmpty]: Start isEmpty. Operand 22947 states and 69024 transitions. [2021-06-05 05:59:27,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:27,965 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:27,965 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:28,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:28,165 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:28,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:28,166 INFO L82 PathProgramCache]: Analyzing trace with hash -503598263, now seen corresponding path program 219 times [2021-06-05 05:59:28,166 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:28,166 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029049444] [2021-06-05 05:59:28,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:28,613 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:28,613 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:28,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029049444] [2021-06-05 05:59:28,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029049444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:28,613 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [429635277] [2021-06-05 05:59:28,613 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:28,644 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:59:28,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:28,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:59:28,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:28,977 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:28,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:59:28,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:28,985 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:28,986 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 05:59:28,986 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:59:29,055 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:29,055 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 05:59:29,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:29,061 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:29,061 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 05:59:29,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:29,210 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:29,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [429635277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:29,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:29,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:29,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536736317] [2021-06-05 05:59:29,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:29,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:29,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:29,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:29,211 INFO L87 Difference]: Start difference. First operand 22947 states and 69024 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:31,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:31,591 INFO L93 Difference]: Finished difference Result 25381 states and 75827 transitions. [2021-06-05 05:59:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:59:31,592 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:31,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:31,627 INFO L225 Difference]: With dead ends: 25381 [2021-06-05 05:59:31,627 INFO L226 Difference]: Without dead ends: 24995 [2021-06-05 05:59:31,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 737 ImplicationChecksByTransitivity, 1586.5ms TimeCoverageRelationStatistics Valid=260, Invalid=3400, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:59:31,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24995 states. [2021-06-05 05:59:31,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24995 to 22967. [2021-06-05 05:59:31,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22967 states, 22966 states have (on average 3.0074022467996167) internal successors, (69068), 22966 states have internal predecessors, (69068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:31,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22967 states to 22967 states and 69068 transitions. [2021-06-05 05:59:31,923 INFO L78 Accepts]: Start accepts. Automaton has 22967 states and 69068 transitions. Word has length 54 [2021-06-05 05:59:31,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:31,923 INFO L482 AbstractCegarLoop]: Abstraction has 22967 states and 69068 transitions. [2021-06-05 05:59:31,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:31,923 INFO L276 IsEmpty]: Start isEmpty. Operand 22967 states and 69068 transitions. [2021-06-05 05:59:31,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:31,945 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:31,946 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:32,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2021-06-05 05:59:32,146 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:32,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:32,147 INFO L82 PathProgramCache]: Analyzing trace with hash -976759255, now seen corresponding path program 220 times [2021-06-05 05:59:32,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:32,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455442576] [2021-06-05 05:59:32,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:32,584 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:32,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:32,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455442576] [2021-06-05 05:59:32,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455442576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:32,585 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955343717] [2021-06-05 05:59:32,585 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:32,615 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:59:32,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:32,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:32,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:32,899 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:59:32,900 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 33 treesize of output 17 [2021-06-05 05:59:32,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:32,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:32,909 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 05:59:32,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 05:59:33,011 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:33,012 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 05:59:33,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:33,017 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:33,017 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 05:59:33,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:33,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:33,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955343717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:33,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:33,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:33,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [847152175] [2021-06-05 05:59:33,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:33,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:33,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:33,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1302, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:33,160 INFO L87 Difference]: Start difference. First operand 22967 states and 69068 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:35,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:35,690 INFO L93 Difference]: Finished difference Result 25333 states and 75695 transitions. [2021-06-05 05:59:35,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:59:35,691 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:35,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:35,727 INFO L225 Difference]: With dead ends: 25333 [2021-06-05 05:59:35,727 INFO L226 Difference]: Without dead ends: 24995 [2021-06-05 05:59:35,728 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 755 ImplicationChecksByTransitivity, 1555.0ms TimeCoverageRelationStatistics Valid=259, Invalid=3401, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:59:35,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24995 states. [2021-06-05 05:59:35,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24995 to 22951. [2021-06-05 05:59:35,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22951 states, 22950 states have (on average 3.0082788671023963) internal successors, (69040), 22950 states have internal predecessors, (69040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:36,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22951 states to 22951 states and 69040 transitions. [2021-06-05 05:59:36,032 INFO L78 Accepts]: Start accepts. Automaton has 22951 states and 69040 transitions. Word has length 54 [2021-06-05 05:59:36,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:36,032 INFO L482 AbstractCegarLoop]: Abstraction has 22951 states and 69040 transitions. [2021-06-05 05:59:36,032 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:36,032 INFO L276 IsEmpty]: Start isEmpty. Operand 22951 states and 69040 transitions. [2021-06-05 05:59:36,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:36,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:36,055 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:36,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 225 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 05:59:36,256 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:36,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:36,256 INFO L82 PathProgramCache]: Analyzing trace with hash -1879874127, now seen corresponding path program 221 times [2021-06-05 05:59:36,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:36,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590764612] [2021-06-05 05:59:36,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:36,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:36,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590764612] [2021-06-05 05:59:36,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590764612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:36,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861616548] [2021-06-05 05:59:36,746 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:36,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:59:36,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:36,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:59:36,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:37,067 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:37,068 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 29 treesize of output 17 [2021-06-05 05:59:37,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:37,077 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:37,078 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 05:59:37,078 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 05:59:37,188 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:59:37,188 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 29 treesize of output 13 [2021-06-05 05:59:37,189 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:37,193 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:37,194 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 05:59:37,194 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-06-05 05:59:37,341 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:37,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861616548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:37,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:37,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:37,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566887185] [2021-06-05 05:59:37,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:37,342 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:37,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:37,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:37,342 INFO L87 Difference]: Start difference. First operand 22951 states and 69040 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:39,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:39,651 INFO L93 Difference]: Finished difference Result 25321 states and 75662 transitions. [2021-06-05 05:59:39,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 05:59:39,652 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:39,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:39,685 INFO L225 Difference]: With dead ends: 25321 [2021-06-05 05:59:39,685 INFO L226 Difference]: Without dead ends: 24940 [2021-06-05 05:59:39,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 761 ImplicationChecksByTransitivity, 1668.9ms TimeCoverageRelationStatistics Valid=260, Invalid=3522, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 05:59:39,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24940 states. [2021-06-05 05:59:39,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24940 to 22951. [2021-06-05 05:59:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22951 states, 22950 states have (on average 3.0081045751633986) internal successors, (69036), 22950 states have internal predecessors, (69036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:39,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22951 states to 22951 states and 69036 transitions. [2021-06-05 05:59:39,993 INFO L78 Accepts]: Start accepts. Automaton has 22951 states and 69036 transitions. Word has length 54 [2021-06-05 05:59:39,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:39,993 INFO L482 AbstractCegarLoop]: Abstraction has 22951 states and 69036 transitions. [2021-06-05 05:59:39,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:39,993 INFO L276 IsEmpty]: Start isEmpty. Operand 22951 states and 69036 transitions. [2021-06-05 05:59:40,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:40,018 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:40,018 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:40,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2021-06-05 05:59:40,218 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:40,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:40,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1306167781, now seen corresponding path program 222 times [2021-06-05 05:59:40,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:40,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8079135] [2021-06-05 05:59:40,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:40,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:40,663 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:40,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:40,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8079135] [2021-06-05 05:59:40,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8079135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:40,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294373269] [2021-06-05 05:59:40,664 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:40,696 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 05:59:40,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:40,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 05:59:40,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:41,028 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:41,029 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 29 treesize of output 17 [2021-06-05 05:59:41,029 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:41,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:41,039 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 05:59:41,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:59:41,111 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:41,111 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 05:59:41,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:41,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:41,117 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 05:59:41,117 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:41,268 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:41,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294373269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:41,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:41,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:41,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868552203] [2021-06-05 05:59:41,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:41,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:41,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:41,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:41,269 INFO L87 Difference]: Start difference. First operand 22951 states and 69036 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:43,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:43,662 INFO L93 Difference]: Finished difference Result 26294 states and 78523 transitions. [2021-06-05 05:59:43,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 05:59:43,662 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:43,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:43,701 INFO L225 Difference]: With dead ends: 26294 [2021-06-05 05:59:43,701 INFO L226 Difference]: Without dead ends: 25908 [2021-06-05 05:59:43,701 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 709 ImplicationChecksByTransitivity, 1620.7ms TimeCoverageRelationStatistics Valid=258, Invalid=3402, Unknown=0, NotChecked=0, Total=3660 [2021-06-05 05:59:43,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25908 states. [2021-06-05 05:59:43,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25908 to 22963. [2021-06-05 05:59:43,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22963 states, 22962 states have (on average 3.0079261388380805) internal successors, (69068), 22962 states have internal predecessors, (69068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:44,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22963 states to 22963 states and 69068 transitions. [2021-06-05 05:59:44,006 INFO L78 Accepts]: Start accepts. Automaton has 22963 states and 69068 transitions. Word has length 54 [2021-06-05 05:59:44,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:44,006 INFO L482 AbstractCegarLoop]: Abstraction has 22963 states and 69068 transitions. [2021-06-05 05:59:44,006 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:44,007 INFO L276 IsEmpty]: Start isEmpty. Operand 22963 states and 69068 transitions. [2021-06-05 05:59:44,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:44,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:44,029 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:44,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:44,229 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:44,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:44,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1205903543, now seen corresponding path program 223 times [2021-06-05 05:59:44,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:44,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861084054] [2021-06-05 05:59:44,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:44,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:44,681 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:44,682 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:44,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861084054] [2021-06-05 05:59:44,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861084054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:44,682 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715248484] [2021-06-05 05:59:44,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:44,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:44,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:44,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:45,003 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:45,003 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:59:45,004 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:45,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:45,012 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 05:59:45,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:59:45,119 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:45,119 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 05:59:45,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:45,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:45,125 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 05:59:45,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:45,274 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:45,274 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715248484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:45,274 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:45,274 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:45,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959013485] [2021-06-05 05:59:45,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:45,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:45,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:45,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:45,275 INFO L87 Difference]: Start difference. First operand 22963 states and 69068 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:48,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:48,179 INFO L93 Difference]: Finished difference Result 26334 states and 78626 transitions. [2021-06-05 05:59:48,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-06-05 05:59:48,180 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:48,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:48,217 INFO L225 Difference]: With dead ends: 26334 [2021-06-05 05:59:48,217 INFO L226 Difference]: Without dead ends: 25957 [2021-06-05 05:59:48,218 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 1924.3ms TimeCoverageRelationStatistics Valid=329, Invalid=4927, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:59:48,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25957 states. [2021-06-05 05:59:48,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25957 to 22966. [2021-06-05 05:59:48,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22966 states, 22965 states have (on average 3.007881558893969) internal successors, (69076), 22965 states have internal predecessors, (69076), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:48,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22966 states to 22966 states and 69076 transitions. [2021-06-05 05:59:48,531 INFO L78 Accepts]: Start accepts. Automaton has 22966 states and 69076 transitions. Word has length 54 [2021-06-05 05:59:48,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:48,532 INFO L482 AbstractCegarLoop]: Abstraction has 22966 states and 69076 transitions. [2021-06-05 05:59:48,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:48,532 INFO L276 IsEmpty]: Start isEmpty. Operand 22966 states and 69076 transitions. [2021-06-05 05:59:48,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:48,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:48,554 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:48,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable259,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:48,754 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:48,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:48,754 INFO L82 PathProgramCache]: Analyzing trace with hash -2019713203, now seen corresponding path program 224 times [2021-06-05 05:59:48,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:48,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780336480] [2021-06-05 05:59:48,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:48,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:49,179 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:49,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:49,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780336480] [2021-06-05 05:59:49,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780336480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:49,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825826653] [2021-06-05 05:59:49,179 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:49,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:59:49,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:49,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:49,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:49,497 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 05:59:49,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 33 treesize of output 17 [2021-06-05 05:59:49,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:49,506 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:49,506 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 05:59:49,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:49, output treesize:27 [2021-06-05 05:59:49,610 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:49,610 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 05:59:49,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:49,615 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:49,616 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 05:59:49,616 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:49,767 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:49,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825826653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:49,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:49,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:49,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202904928] [2021-06-05 05:59:49,768 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:49,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:49,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:49,768 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:49,768 INFO L87 Difference]: Start difference. First operand 22966 states and 69076 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:52,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:52,815 INFO L93 Difference]: Finished difference Result 26790 states and 79883 transitions. [2021-06-05 05:59:52,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-06-05 05:59:52,816 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:52,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:52,854 INFO L225 Difference]: With dead ends: 26790 [2021-06-05 05:59:52,855 INFO L226 Difference]: Without dead ends: 26429 [2021-06-05 05:59:52,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1305 ImplicationChecksByTransitivity, 2005.3ms TimeCoverageRelationStatistics Valid=350, Invalid=5350, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 05:59:52,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26429 states. [2021-06-05 05:59:53,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26429 to 22978. [2021-06-05 05:59:53,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22978 states, 22977 states have (on average 3.0077468773120946) internal successors, (69109), 22977 states have internal predecessors, (69109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:53,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22978 states to 22978 states and 69109 transitions. [2021-06-05 05:59:53,189 INFO L78 Accepts]: Start accepts. Automaton has 22978 states and 69109 transitions. Word has length 54 [2021-06-05 05:59:53,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:53,189 INFO L482 AbstractCegarLoop]: Abstraction has 22978 states and 69109 transitions. [2021-06-05 05:59:53,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:53,189 INFO L276 IsEmpty]: Start isEmpty. Operand 22978 states and 69109 transitions. [2021-06-05 05:59:53,211 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:53,211 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:53,211 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:53,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable260 [2021-06-05 05:59:53,412 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:53,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:53,412 INFO L82 PathProgramCache]: Analyzing trace with hash -529797239, now seen corresponding path program 225 times [2021-06-05 05:59:53,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:53,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98990866] [2021-06-05 05:59:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:53,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:53,845 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:53,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:53,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98990866] [2021-06-05 05:59:53,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98990866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:53,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114326238] [2021-06-05 05:59:53,845 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:53,878 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:59:53,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:53,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 49 conjunts are in the unsatisfiable core [2021-06-05 05:59:53,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:54,170 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:54,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 05:59:54,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:54,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:54,178 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 05:59:54,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:59:54,264 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 05:59:54,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 05:59:54,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-06-05 05:59:54,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:54,273 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:54,274 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 05:59:54,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:39, output treesize:13 [2021-06-05 05:59:54,466 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:54,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114326238] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:54,467 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:54,467 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:54,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573597596] [2021-06-05 05:59:54,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:54,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:54,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:54,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=1307, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:54,467 INFO L87 Difference]: Start difference. First operand 22978 states and 69109 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:57,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:59:57,999 INFO L93 Difference]: Finished difference Result 28278 states and 84385 transitions. [2021-06-05 05:59:57,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-06-05 05:59:57,999 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 05:59:57,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:59:58,040 INFO L225 Difference]: With dead ends: 28278 [2021-06-05 05:59:58,040 INFO L226 Difference]: Without dead ends: 28057 [2021-06-05 05:59:58,041 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1136 ImplicationChecksByTransitivity, 2126.7ms TimeCoverageRelationStatistics Valid=362, Invalid=5188, Unknown=0, NotChecked=0, Total=5550 [2021-06-05 05:59:58,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28057 states. [2021-06-05 05:59:58,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28057 to 22982. [2021-06-05 05:59:58,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22982 states, 22981 states have (on average 3.007702014707802) internal successors, (69120), 22981 states have internal predecessors, (69120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22982 states to 22982 states and 69120 transitions. [2021-06-05 05:59:58,373 INFO L78 Accepts]: Start accepts. Automaton has 22982 states and 69120 transitions. Word has length 54 [2021-06-05 05:59:58,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:59:58,373 INFO L482 AbstractCegarLoop]: Abstraction has 22982 states and 69120 transitions. [2021-06-05 05:59:58,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:59:58,374 INFO L276 IsEmpty]: Start isEmpty. Operand 22982 states and 69120 transitions. [2021-06-05 05:59:58,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 05:59:58,395 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:59:58,395 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 05:59:58,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable261,230 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:58,596 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:59:58,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:59:58,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1064302957, now seen corresponding path program 226 times [2021-06-05 05:59:58,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:59:58,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818368671] [2021-06-05 05:59:58,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:59:58,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:59:59,025 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:59:59,026 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:59:59,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818368671] [2021-06-05 05:59:59,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [818368671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:59,026 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717135897] [2021-06-05 05:59:59,026 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:59:59,058 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:59:59,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:59:59,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 05:59:59,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:59:59,348 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:59,349 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 29 treesize of output 17 [2021-06-05 05:59:59,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:59,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:59,357 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 05:59:59,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:45, output treesize:27 [2021-06-05 05:59:59,426 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 05:59:59,426 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 05:59:59,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 05:59:59,432 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 05:59:59,432 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 05:59:59,432 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 05:59:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:59:59,614 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1717135897] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:59:59,614 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:59:59,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 05:59:59,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629526656] [2021-06-05 05:59:59,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 05:59:59,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:59:59,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 05:59:59,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 05:59:59,615 INFO L87 Difference]: Start difference. First operand 22982 states and 69120 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:02,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:02,934 INFO L93 Difference]: Finished difference Result 30436 states and 90583 transitions. [2021-06-05 06:00:02,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-06-05 06:00:02,934 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 06:00:02,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:02,979 INFO L225 Difference]: With dead ends: 30436 [2021-06-05 06:00:02,979 INFO L226 Difference]: Without dead ends: 30250 [2021-06-05 06:00:02,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1297 ImplicationChecksByTransitivity, 2020.4ms TimeCoverageRelationStatistics Valid=356, Invalid=5344, Unknown=0, NotChecked=0, Total=5700 [2021-06-05 06:00:03,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30250 states. [2021-06-05 06:00:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30250 to 22951. [2021-06-05 06:00:03,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22951 states, 22950 states have (on average 3.0081045751633986) internal successors, (69036), 22950 states have internal predecessors, (69036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:03,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22951 states to 22951 states and 69036 transitions. [2021-06-05 06:00:03,507 INFO L78 Accepts]: Start accepts. Automaton has 22951 states and 69036 transitions. Word has length 54 [2021-06-05 06:00:03,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:03,507 INFO L482 AbstractCegarLoop]: Abstraction has 22951 states and 69036 transitions. [2021-06-05 06:00:03,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:03,508 INFO L276 IsEmpty]: Start isEmpty. Operand 22951 states and 69036 transitions. [2021-06-05 06:00:03,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 06:00:03,530 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:03,530 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 06:00:03,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,231 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:03,730 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:03,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:03,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1408709609, now seen corresponding path program 227 times [2021-06-05 06:00:03,731 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:03,731 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161023700] [2021-06-05 06:00:03,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:04,188 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:04,189 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161023700] [2021-06-05 06:00:04,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161023700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:04,189 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653770787] [2021-06-05 06:00:04,189 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:04,221 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:00:04,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:04,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 54 conjunts are in the unsatisfiable core [2021-06-05 06:00:04,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:04,561 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:04,561 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 29 treesize of output 17 [2021-06-05 06:00:04,562 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:04,571 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:04,571 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 06:00:04,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 06:00:04,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:04,718 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 06:00:04,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:04,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:04,724 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 06:00:04,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 06:00:04,877 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:00:04,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653770787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:04,877 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:04,877 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 39 [2021-06-05 06:00:04,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72998838] [2021-06-05 06:00:04,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 40 states [2021-06-05 06:00:04,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:04,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-06-05 06:00:04,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1443, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 06:00:04,878 INFO L87 Difference]: Start difference. First operand 22951 states and 69036 transitions. Second operand has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:08,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:08,049 INFO L93 Difference]: Finished difference Result 26234 states and 78049 transitions. [2021-06-05 06:00:08,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-06-05 06:00:08,049 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 06:00:08,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:08,088 INFO L225 Difference]: With dead ends: 26234 [2021-06-05 06:00:08,088 INFO L226 Difference]: Without dead ends: 25710 [2021-06-05 06:00:08,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 35 SyntacticMatches, 4 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1583 ImplicationChecksByTransitivity, 2271.8ms TimeCoverageRelationStatistics Valid=422, Invalid=5898, Unknown=0, NotChecked=0, Total=6320 [2021-06-05 06:00:08,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25710 states. [2021-06-05 06:00:08,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25710 to 22993. [2021-06-05 06:00:08,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22993 states, 22992 states have (on average 3.00839422407794) internal successors, (69169), 22992 states have internal predecessors, (69169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:08,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22993 states to 22993 states and 69169 transitions. [2021-06-05 06:00:08,419 INFO L78 Accepts]: Start accepts. Automaton has 22993 states and 69169 transitions. Word has length 54 [2021-06-05 06:00:08,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:08,420 INFO L482 AbstractCegarLoop]: Abstraction has 22993 states and 69169 transitions. [2021-06-05 06:00:08,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 40 states, 40 states have (on average 2.45) internal successors, (98), 39 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:08,420 INFO L276 IsEmpty]: Start isEmpty. Operand 22993 states and 69169 transitions. [2021-06-05 06:00:08,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 06:00:08,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:08,443 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 06:00:08,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable263,232 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:08,654 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:08,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:08,654 INFO L82 PathProgramCache]: Analyzing trace with hash 659500431, now seen corresponding path program 228 times [2021-06-05 06:00:08,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:08,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283946054] [2021-06-05 06:00:08,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:09,080 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:09,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:09,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283946054] [2021-06-05 06:00:09,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283946054] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:09,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810491805] [2021-06-05 06:00:09,081 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:09,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 06:00:09,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:09,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 06:00:09,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:09,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:09,450 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:09,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 17 [2021-06-05 06:00:09,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:09,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:09,470 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 06:00:09,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:60, output treesize:30 [2021-06-05 06:00:09,622 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:09,622 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 06:00:09,623 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:09,628 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:09,628 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 06:00:09,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 06:00:09,783 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:00:09,783 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [810491805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:09,783 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:09,783 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 38 [2021-06-05 06:00:09,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458973240] [2021-06-05 06:00:09,783 INFO L462 AbstractCegarLoop]: Interpolant automaton has 39 states [2021-06-05 06:00:09,783 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:09,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-06-05 06:00:09,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1375, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 06:00:09,784 INFO L87 Difference]: Start difference. First operand 22993 states and 69169 transitions. Second operand has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:14,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:14,170 INFO L93 Difference]: Finished difference Result 26221 states and 77998 transitions. [2021-06-05 06:00:14,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-06-05 06:00:14,171 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 06:00:14,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:14,210 INFO L225 Difference]: With dead ends: 26221 [2021-06-05 06:00:14,210 INFO L226 Difference]: Without dead ends: 25840 [2021-06-05 06:00:14,211 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 37 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2054 ImplicationChecksByTransitivity, 2911.3ms TimeCoverageRelationStatistics Valid=521, Invalid=7489, Unknown=0, NotChecked=0, Total=8010 [2021-06-05 06:00:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25840 states. [2021-06-05 06:00:14,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25840 to 23040. [2021-06-05 06:00:14,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23040 states, 23039 states have (on average 3.0085507183471503) internal successors, (69314), 23039 states have internal predecessors, (69314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:14,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23040 states to 23040 states and 69314 transitions. [2021-06-05 06:00:14,533 INFO L78 Accepts]: Start accepts. Automaton has 23040 states and 69314 transitions. Word has length 54 [2021-06-05 06:00:14,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:14,533 INFO L482 AbstractCegarLoop]: Abstraction has 23040 states and 69314 transitions. [2021-06-05 06:00:14,533 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 39 states, 39 states have (on average 2.5384615384615383) internal successors, (99), 38 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:14,533 INFO L276 IsEmpty]: Start isEmpty. Operand 23040 states and 69314 transitions. [2021-06-05 06:00:14,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 06:00:14,558 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:14,558 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 06:00:14,758 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:14,758 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:14,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:14,758 INFO L82 PathProgramCache]: Analyzing trace with hash -265072461, now seen corresponding path program 229 times [2021-06-05 06:00:14,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:14,758 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980640970] [2021-06-05 06:00:14,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:14,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:15,238 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:15,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980640970] [2021-06-05 06:00:15,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980640970] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:15,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182936701] [2021-06-05 06:00:15,238 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:15,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:15,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 06:00:15,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:15,522 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:15,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 17 [2021-06-05 06:00:15,523 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:15,532 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:15,532 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 06:00:15,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 06:00:15,675 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:15,675 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 06:00:15,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:15,681 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:15,681 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 06:00:15,681 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 06:00:15,835 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:00:15,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1182936701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:15,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:15,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 06:00:15,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233236178] [2021-06-05 06:00:15,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:00:15,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:15,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:00:15,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:00:15,836 INFO L87 Difference]: Start difference. First operand 23040 states and 69314 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:18,051 INFO L93 Difference]: Finished difference Result 26199 states and 78252 transitions. [2021-06-05 06:00:18,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 06:00:18,052 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 06:00:18,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:18,096 INFO L225 Difference]: With dead ends: 26199 [2021-06-05 06:00:18,097 INFO L226 Difference]: Without dead ends: 25749 [2021-06-05 06:00:18,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1671.9ms TimeCoverageRelationStatistics Valid=263, Invalid=3519, Unknown=0, NotChecked=0, Total=3782 [2021-06-05 06:00:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25749 states. [2021-06-05 06:00:18,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25749 to 23002. [2021-06-05 06:00:18,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23002 states, 23001 states have (on average 3.008434415894961) internal successors, (69197), 23001 states have internal predecessors, (69197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:18,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23002 states to 23002 states and 69197 transitions. [2021-06-05 06:00:18,482 INFO L78 Accepts]: Start accepts. Automaton has 23002 states and 69197 transitions. Word has length 54 [2021-06-05 06:00:18,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:18,482 INFO L482 AbstractCegarLoop]: Abstraction has 23002 states and 69197 transitions. [2021-06-05 06:00:18,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:18,482 INFO L276 IsEmpty]: Start isEmpty. Operand 23002 states and 69197 transitions. [2021-06-05 06:00:18,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 06:00:18,510 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:18,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 06:00:18,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 234 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable265 [2021-06-05 06:00:18,713 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:18,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:18,713 INFO L82 PathProgramCache]: Analyzing trace with hash -2075956557, now seen corresponding path program 230 times [2021-06-05 06:00:18,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:18,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709526152] [2021-06-05 06:00:18,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:18,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:19,149 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:19,149 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:19,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709526152] [2021-06-05 06:00:19,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709526152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:19,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [172453553] [2021-06-05 06:00:19,149 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:19,185 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 06:00:19,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:19,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 06:00:19,186 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:19,445 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-06-05 06:00:19,446 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 33 treesize of output 17 [2021-06-05 06:00:19,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:19,455 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:19,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:00:19,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:52, output treesize:30 [2021-06-05 06:00:19,597 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:19,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 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 06:00:19,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:19,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:19,603 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 06:00:19,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 06:00:19,755 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:00:19,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [172453553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:19,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:19,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 06:00:19,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694230543] [2021-06-05 06:00:19,756 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:00:19,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:19,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:00:19,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=1304, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:00:19,756 INFO L87 Difference]: Start difference. First operand 23002 states and 69197 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:22,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:22,394 INFO L93 Difference]: Finished difference Result 26589 states and 79337 transitions. [2021-06-05 06:00:22,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-06-05 06:00:22,395 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 06:00:22,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:22,432 INFO L225 Difference]: With dead ends: 26589 [2021-06-05 06:00:22,432 INFO L226 Difference]: Without dead ends: 26228 [2021-06-05 06:00:22,432 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 1697.1ms TimeCoverageRelationStatistics Valid=273, Invalid=3887, Unknown=0, NotChecked=0, Total=4160 [2021-06-05 06:00:22,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26228 states. [2021-06-05 06:00:22,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26228 to 23014. [2021-06-05 06:00:22,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23014 states, 23013 states have (on average 3.0082996567157694) internal successors, (69230), 23013 states have internal predecessors, (69230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:22,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23014 states to 23014 states and 69230 transitions. [2021-06-05 06:00:22,743 INFO L78 Accepts]: Start accepts. Automaton has 23014 states and 69230 transitions. Word has length 54 [2021-06-05 06:00:22,743 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:22,743 INFO L482 AbstractCegarLoop]: Abstraction has 23014 states and 69230 transitions. [2021-06-05 06:00:22,743 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:22,743 INFO L276 IsEmpty]: Start isEmpty. Operand 23014 states and 69230 transitions. [2021-06-05 06:00:22,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 06:00:22,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:22,765 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 06:00:22,966 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 06:00:22,966 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:22,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:22,966 INFO L82 PathProgramCache]: Analyzing trace with hash -586040593, now seen corresponding path program 231 times [2021-06-05 06:00:22,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:22,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380038751] [2021-06-05 06:00:22,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:22,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:23,390 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:23,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:23,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380038751] [2021-06-05 06:00:23,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380038751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:23,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576137703] [2021-06-05 06:00:23,390 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:23,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 06:00:23,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:23,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 06:00:23,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:23,747 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:23,748 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 29 treesize of output 17 [2021-06-05 06:00:23,748 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:23,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:23,758 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 06:00:23,758 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 06:00:23,872 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:23,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:23,873 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-06-05 06:00:23,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:23,881 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:23,882 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 06:00:23,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:41, output treesize:13 [2021-06-05 06:00:24,072 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:00:24,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576137703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:24,073 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:24,073 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 06:00:24,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998970360] [2021-06-05 06:00:24,073 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:00:24,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:24,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:00:24,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1306, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:00:24,073 INFO L87 Difference]: Start difference. First operand 23014 states and 69230 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:27,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:27,132 INFO L93 Difference]: Finished difference Result 27799 states and 82892 transitions. [2021-06-05 06:00:27,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:00:27,132 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 06:00:27,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:27,174 INFO L225 Difference]: With dead ends: 27799 [2021-06-05 06:00:27,174 INFO L226 Difference]: Without dead ends: 27578 [2021-06-05 06:00:27,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 698 ImplicationChecksByTransitivity, 1748.9ms TimeCoverageRelationStatistics Valid=279, Invalid=3627, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:00:27,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27578 states. [2021-06-05 06:00:27,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27578 to 23018. [2021-06-05 06:00:27,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23018 states, 23017 states have (on average 3.0082547682147975) internal successors, (69241), 23017 states have internal predecessors, (69241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:27,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23018 states to 23018 states and 69241 transitions. [2021-06-05 06:00:27,503 INFO L78 Accepts]: Start accepts. Automaton has 23018 states and 69241 transitions. Word has length 54 [2021-06-05 06:00:27,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:27,503 INFO L482 AbstractCegarLoop]: Abstraction has 23018 states and 69241 transitions. [2021-06-05 06:00:27,503 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:27,503 INFO L276 IsEmpty]: Start isEmpty. Operand 23018 states and 69241 transitions. [2021-06-05 06:00:27,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 06:00:27,525 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:27,525 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 06:00:27,725 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 236 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable267 [2021-06-05 06:00:27,725 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:27,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:27,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1008059603, now seen corresponding path program 232 times [2021-06-05 06:00:27,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:27,726 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979248791] [2021-06-05 06:00:27,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:27,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:28,159 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:28,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979248791] [2021-06-05 06:00:28,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [979248791] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:28,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487851120] [2021-06-05 06:00:28,159 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:28,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 06:00:28,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 50 conjunts are in the unsatisfiable core [2021-06-05 06:00:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:28,442 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:28,442 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 29 treesize of output 17 [2021-06-05 06:00:28,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:28,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:28,452 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 06:00:28,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:30 [2021-06-05 06:00:28,557 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:28,557 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 06:00:28,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:28,563 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:28,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 06:00:28,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-06-05 06:00:28,742 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:00:28,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487851120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:28,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:28,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 06:00:28,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105215575] [2021-06-05 06:00:28,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:00:28,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:28,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:00:28,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=1303, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:00:28,743 INFO L87 Difference]: Start difference. First operand 23018 states and 69241 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:31,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 06:00:31,052 INFO L93 Difference]: Finished difference Result 29986 states and 89112 transitions. [2021-06-05 06:00:31,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:00:31,053 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-06-05 06:00:31,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 06:00:31,095 INFO L225 Difference]: With dead ends: 29986 [2021-06-05 06:00:31,095 INFO L226 Difference]: Without dead ends: 29800 [2021-06-05 06:00:31,096 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 37 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 794 ImplicationChecksByTransitivity, 1591.2ms TimeCoverageRelationStatistics Valid=266, Invalid=3640, Unknown=0, NotChecked=0, Total=3906 [2021-06-05 06:00:31,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29800 states. [2021-06-05 06:00:31,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29800 to 22994. [2021-06-05 06:00:31,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22994 states, 22993 states have (on average 3.00848084199539) internal successors, (69174), 22993 states have internal predecessors, (69174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22994 states to 22994 states and 69174 transitions. [2021-06-05 06:00:31,435 INFO L78 Accepts]: Start accepts. Automaton has 22994 states and 69174 transitions. Word has length 54 [2021-06-05 06:00:31,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 06:00:31,435 INFO L482 AbstractCegarLoop]: Abstraction has 22994 states and 69174 transitions. [2021-06-05 06:00:31,435 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 06:00:31,435 INFO L276 IsEmpty]: Start isEmpty. Operand 22994 states and 69174 transitions. [2021-06-05 06:00:31,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-06-05 06:00:31,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 06:00:31,458 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 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, 1, 1] [2021-06-05 06:00:31,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 06:00:31,659 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 06:00:31,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 06:00:31,659 INFO L82 PathProgramCache]: Analyzing trace with hash 1765883997, now seen corresponding path program 233 times [2021-06-05 06:00:31,659 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 06:00:31,659 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675521256] [2021-06-05 06:00:31,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 06:00:31,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 06:00:32,080 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 06:00:32,081 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 06:00:32,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675521256] [2021-06-05 06:00:32,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675521256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:32,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820238322] [2021-06-05 06:00:32,081 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:32,113 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 06:00:32,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 06:00:32,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 48 conjunts are in the unsatisfiable core [2021-06-05 06:00:32,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 06:00:32,383 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-06-05 06:00:32,383 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 27 treesize of output 15 [2021-06-05 06:00:32,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:32,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:32,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: 1 dim-0 vars, and 1 xjuncts. [2021-06-05 06:00:32,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:51, output treesize:33 [2021-06-05 06:00:32,622 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 06:00:32,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 06:00:32,623 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 13 [2021-06-05 06:00:32,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 06:00:32,633 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 06:00:32,633 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 06:00:32,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:42, output treesize:13 [2021-06-05 06:00:32,793 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 06:00:32,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820238322] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 06:00:32,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 06:00:32,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 37 [2021-06-05 06:00:32,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693320922] [2021-06-05 06:00:32,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-06-05 06:00:32,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 06:00:32,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-06-05 06:00:32,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1305, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 06:00:32,794 INFO L87 Difference]: Start difference. First operand 22994 states and 69174 transitions. Second operand has 38 states, 38 states have (on average 2.473684210526316) internal successors, (94), 37 states have internal predecessors, (94), 0 states have call successors, (0), 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 06:00:36,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 06:00:36,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable269,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 06:00:36,461 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 06:00:36,463 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 06:00:36,465 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 06:00:36,466 INFO L202 PluginConnector]: Adding new model queue-add-3.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 06:00:36 BasicIcfg [2021-06-05 06:00:36,466 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 06:00:36,466 INFO L168 Benchmark]: Toolchain (without parser) took 754680.72 ms. Allocated memory was 346.0 MB in the beginning and 8.0 GB in the end (delta: 7.7 GB). Free memory was 325.9 MB in the beginning and 3.0 GB in the end (delta: -2.6 GB). Peak memory consumption was 5.0 GB. Max. memory is 16.0 GB. [2021-06-05 06:00:36,466 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 346.0 MB. Free memory was 327.2 MB in the beginning and 327.1 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:00:36,466 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.04 ms. Allocated memory is still 346.0 MB. Free memory was 325.9 MB in the beginning and 324.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 06:00:36,466 INFO L168 Benchmark]: Boogie Preprocessor took 19.97 ms. Allocated memory is still 346.0 MB. Free memory was 324.4 MB in the beginning and 323.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 06:00:36,467 INFO L168 Benchmark]: RCFGBuilder took 273.03 ms. Allocated memory is still 346.0 MB. Free memory was 323.3 MB in the beginning and 307.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 06:00:36,467 INFO L168 Benchmark]: TraceAbstraction took 754358.03 ms. Allocated memory was 346.0 MB in the beginning and 8.0 GB in the end (delta: 7.7 GB). Free memory was 307.1 MB in the beginning and 3.0 GB in the end (delta: -2.7 GB). Peak memory consumption was 5.0 GB. Max. memory is 16.0 GB. [2021-06-05 06:00:36,467 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 0.15 ms. Allocated memory is still 346.0 MB. Free memory was 327.2 MB in the beginning and 327.1 MB in the end (delta: 76.2 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.04 ms. Allocated memory is still 346.0 MB. Free memory was 325.9 MB in the beginning and 324.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 19.97 ms. Allocated memory is still 346.0 MB. Free memory was 324.4 MB in the beginning and 323.4 MB in the end (delta: 1.0 MB). There was no memory consumed. Max. memory is 16.0 GB. * RCFGBuilder took 273.03 ms. Allocated memory is still 346.0 MB. Free memory was 323.3 MB in the beginning and 307.6 MB in the end (delta: 15.7 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 754358.03 ms. Allocated memory was 346.0 MB in the beginning and 8.0 GB in the end (delta: 7.7 GB). Free memory was 307.1 MB in the beginning and 3.0 GB in the end (delta: -2.7 GB). Peak memory consumption was 5.0 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (22994states) and FLOYD_HOARE automaton (currently 41 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (25061 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 82]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (22994states) and FLOYD_HOARE automaton (currently 41 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (25061 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 81]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (22994states) and FLOYD_HOARE automaton (currently 41 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (25061 states constructedinput type IntersectNwa). - TimeoutResultAtElement [Line: 88]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (22994states) and FLOYD_HOARE automaton (currently 41 states, 38 states before enhancement),while ReachableStatesComputation was computing reachable states (25061 states constructedinput type IntersectNwa). - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 63 locations, 4 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 754238.1ms, OverallIterations: 241, TraceHistogramMax: 3, EmptinessCheckTime: 3280.1ms, AutomataDifference: 467633.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 93.4ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 40130 SDtfs, 85884 SDslu, 701232 SDs, 0 SdLazy, 602244 SolverSat, 12425 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 205575.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 21947 GetRequests, 8032 SyntacticMatches, 694 SemanticMatches, 13221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194233 ImplicationChecksByTransitivity, 329217.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=23040occurred in iteration=236, InterpolantAutomatonStates: 9571, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 47061.9ms AutomataMinimizationTime, 240 MinimizatonAttempts, 646746 StatesRemovedByMinimization, 236 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1289.7ms SsaConstructionTime, 3821.8ms SatisfiabilityAnalysisTime, 177571.5ms InterpolantComputationTime, 22858 NumberOfCodeBlocks, 22844 NumberOfCodeBlocksAsserted, 770 NumberOfCheckSat, 22380 ConstructedInterpolants, 230 QuantifiedInterpolants, 348901 SizeOfPredicates, 2647 NumberOfNonLiveVariables, 27567 ConjunctsInSsa, 9194 ConjunctsInUnsatCore, 478 InterpolantComputations, 5 PerfectInterpolantSequences, 1324/12425 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 !SESSION 2021-06-05 05:48:00.063 ----------------------------------------------- eclipse.buildId=unknown java.version=11.0.11 java.vendor=Debian BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_US Framework arguments: -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/queue-add-3.wvr.bpl Command-line arguments: -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/queue-add-3.wvr.bpl !ENTRY org.eclipse.osgi 4 0 2021-06-05 06:00:36.708 !MESSAGE Application error !STACK 1 org.eclipse.core.internal.resources.ResourceException(/)[568]: java.io.FileNotFoundException: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5e0d361c7/.metadata/.plugins/org.eclipse.core.resources/.root/1.tree (No such file or directory) at java.base/java.io.FileOutputStream.open0(Native Method) at java.base/java.io.FileOutputStream.open(FileOutputStream.java:298) at java.base/java.io.FileOutputStream.(FileOutputStream.java:237) at java.base/java.io.FileOutputStream.(FileOutputStream.java:187) at org.eclipse.core.internal.localstore.SafeFileOutputStream.(SafeFileOutputStream.java:55) at org.eclipse.core.internal.resources.SaveManager.saveTree(SaveManager.java:1381) at org.eclipse.core.internal.resources.SaveManager.save(SaveManager.java:1168) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2333) at org.eclipse.core.internal.resources.Workspace.save(Workspace.java:2322) at de.uni_freiburg.informatik.ultimate.core.coreplugin.UltimateCore.start(UltimateCore.java:191) at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:203) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:134) at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:104) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:401) at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:255) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.base/java.lang.reflect.Method.invoke(Method.java:566) at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:657) at org.eclipse.equinox.launcher.Main.basicRun(Main.java:594) at org.eclipse.equinox.launcher.Main.run(Main.java:1465) at org.eclipse.equinox.launcher.Main.main(Main.java:1438)