/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/counter-determinism.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 05:24:07,405 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 05:24:07,407 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 05:24:07,432 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 05:24:07,458 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 05:24:07,459 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 05:24:07,459 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 05:24:07,464 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 05:24:07,484 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 05:24:07,484 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 05:24:07,484 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 05:24:07,484 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 05:24:07,486 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 05:24:07,486 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 05:24:07,486 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 05:24:07,486 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 05:24:07,486 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 05:24:07,486 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 05:24:07,487 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 05:24:07,487 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 05:24:07,487 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 05:24:07,487 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 05:24:07,487 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 05:24:07,487 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 05:24:07,487 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 05:24:07,487 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 05:24:07,488 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 05:24:07,488 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 05:24:07,488 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 05:24:07,488 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 05:24:07,488 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 05:24:07,488 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 05:24:07,489 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 05:24:07,489 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 05:24:07,489 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 05:24:07,489 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 05:24:07,489 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 05:24:07,489 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 05:24:07,489 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 05:24:07,490 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 05:24:07,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 05:24:07,797 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 05:24:07,800 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 05:24:07,801 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 05:24:07,803 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 05:24:07,803 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl [2021-06-05 05:24:07,804 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/counter-determinism.wvr.bpl' [2021-06-05 05:24:07,930 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 05:24:07,931 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 05:24:07,932 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 05:24:07,932 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 05:24:07,932 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 05:24:07,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,948 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,952 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 05:24:07,953 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 05:24:07,954 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 05:24:07,954 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 05:24:07,960 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,960 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,961 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,961 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,964 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,966 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,967 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/1) ... [2021-06-05 05:24:07,968 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 05:24:07,969 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 05:24:07,969 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 05:24:07,969 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 05:24:07,970 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (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 05:24:08,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 05:24:08,025 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 05:24:08,025 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 05:24:08,025 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 05:24:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 05:24:08,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 05:24:08,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 05:24:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 05:24:08,026 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 05:24:08,026 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 05:24:08,026 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 05:24:08,026 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 05:24:08,027 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 05:24:08,027 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 05:24:08,027 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 05:24:08,028 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 05:24:08,192 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 05:24:08,193 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-06-05 05:24:08,194 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:24:08 BoogieIcfgContainer [2021-06-05 05:24:08,195 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 05:24:08,196 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 05:24:08,196 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 05:24:08,198 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 05:24:08,199 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 05:24:07" (1/2) ... [2021-06-05 05:24:08,200 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@10875d95 and model type counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 05:24:08, skipping insertion in model container [2021-06-05 05:24:08,200 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 05:24:08" (2/2) ... [2021-06-05 05:24:08,201 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-determinism.wvr.bpl [2021-06-05 05:24:08,205 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 05:24:08,206 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 05:24:08,206 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 05:24:08,206 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 05:24:08,257 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 05:24:08,273 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 05:24:08,288 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 05:24:08,289 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 05:24:08,289 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 05:24:08,289 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 05:24:08,289 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 05:24:08,289 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 05:24:08,289 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 05:24:08,289 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 05:24:08,297 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 48 places, 39 transitions, 110 flow [2021-06-05 05:24:08,380 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,387 INFO L276 IsEmpty]: Start isEmpty. Operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-06-05 05:24:08,407 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:08,408 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 05:24:08,409 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:08,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:08,423 INFO L82 PathProgramCache]: Analyzing trace with hash 187435854, now seen corresponding path program 1 times [2021-06-05 05:24:08,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:08,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548424310] [2021-06-05 05:24:08,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:08,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:08,694 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 05:24:08,694 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:08,695 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548424310] [2021-06-05 05:24:08,695 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548424310] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:08,695 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:08,695 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:24:08,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072885806] [2021-06-05 05:24:08,699 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 05:24:08,699 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:08,713 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 05:24:08,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-06-05 05:24:08,720 INFO L87 Difference]: Start difference. First operand has 437 states, 435 states have (on average 3.8183908045977013) internal successors, (1661), 436 states have internal predecessors, (1661), 0 states have call successors, (0), 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 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 05:24:08,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:08,826 INFO L93 Difference]: Finished difference Result 1267 states and 4622 transitions. [2021-06-05 05:24:08,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 05:24:08,827 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 05:24:08,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:08,865 INFO L225 Difference]: With dead ends: 1267 [2021-06-05 05:24:08,865 INFO L226 Difference]: Without dead ends: 1056 [2021-06-05 05:24:08,867 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 63.1ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:24:08,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-06-05 05:24:08,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 775. [2021-06-05 05:24:08,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 775 states, 774 states have (on average 3.7751937984496124) internal successors, (2922), 774 states have internal predecessors, (2922), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:08,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 775 states to 775 states and 2922 transitions. [2021-06-05 05:24:08,988 INFO L78 Accepts]: Start accepts. Automaton has 775 states and 2922 transitions. Word has length 25 [2021-06-05 05:24:08,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:08,989 INFO L482 AbstractCegarLoop]: Abstraction has 775 states and 2922 transitions. [2021-06-05 05:24:08,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 6.25) internal successors, (25), 4 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 05:24:08,989 INFO L276 IsEmpty]: Start isEmpty. Operand 775 states and 2922 transitions. [2021-06-05 05:24:08,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:24:08,996 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:08,996 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] [2021-06-05 05:24:08,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 05:24:08,997 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:08,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:08,998 INFO L82 PathProgramCache]: Analyzing trace with hash 801929296, now seen corresponding path program 1 times [2021-06-05 05:24:08,998 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:08,998 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586182720] [2021-06-05 05:24:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:09,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:09,057 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 05:24:09,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:09,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586182720] [2021-06-05 05:24:09,058 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586182720] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:09,058 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:09,058 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 05:24:09,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271278322] [2021-06-05 05:24:09,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:24:09,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:09,061 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:24:09,061 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:24:09,061 INFO L87 Difference]: Start difference. First operand 775 states and 2922 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:09,172 INFO L93 Difference]: Finished difference Result 1405 states and 5168 transitions. [2021-06-05 05:24:09,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:24:09,172 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:24:09,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:09,182 INFO L225 Difference]: With dead ends: 1405 [2021-06-05 05:24:09,183 INFO L226 Difference]: Without dead ends: 1369 [2021-06-05 05:24:09,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 51.5ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:24:09,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1369 states. [2021-06-05 05:24:09,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1369 to 903. [2021-06-05 05:24:09,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 3.8104212860310422) internal successors, (3437), 902 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3437 transitions. [2021-06-05 05:24:09,226 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3437 transitions. Word has length 27 [2021-06-05 05:24:09,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:09,226 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3437 transitions. [2021-06-05 05:24:09,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,227 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3437 transitions. [2021-06-05 05:24:09,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:24:09,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:09,230 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] [2021-06-05 05:24:09,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-06-05 05:24:09,231 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:09,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:09,232 INFO L82 PathProgramCache]: Analyzing trace with hash -2091759792, now seen corresponding path program 1 times [2021-06-05 05:24:09,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:09,232 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119741421] [2021-06-05 05:24:09,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:09,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:09,286 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 05:24:09,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:09,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119741421] [2021-06-05 05:24:09,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2119741421] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:09,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:09,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 05:24:09,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055962576] [2021-06-05 05:24:09,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:24:09,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:09,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:24:09,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:24:09,289 INFO L87 Difference]: Start difference. First operand 903 states and 3437 transitions. Second operand has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:09,413 INFO L93 Difference]: Finished difference Result 1359 states and 4974 transitions. [2021-06-05 05:24:09,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:24:09,413 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:24:09,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:09,422 INFO L225 Difference]: With dead ends: 1359 [2021-06-05 05:24:09,422 INFO L226 Difference]: Without dead ends: 1327 [2021-06-05 05:24:09,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 61.4ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:24:09,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-06-05 05:24:09,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 931. [2021-06-05 05:24:09,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 931 states, 930 states have (on average 3.7838709677419353) internal successors, (3519), 930 states have internal predecessors, (3519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 931 states to 931 states and 3519 transitions. [2021-06-05 05:24:09,460 INFO L78 Accepts]: Start accepts. Automaton has 931 states and 3519 transitions. Word has length 27 [2021-06-05 05:24:09,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:09,461 INFO L482 AbstractCegarLoop]: Abstraction has 931 states and 3519 transitions. [2021-06-05 05:24:09,461 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.857142857142857) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,461 INFO L276 IsEmpty]: Start isEmpty. Operand 931 states and 3519 transitions. [2021-06-05 05:24:09,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:24:09,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:09,464 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] [2021-06-05 05:24:09,464 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-06-05 05:24:09,465 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:09,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:09,466 INFO L82 PathProgramCache]: Analyzing trace with hash 1293793296, now seen corresponding path program 2 times [2021-06-05 05:24:09,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:09,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239758152] [2021-06-05 05:24:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:09,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:09,526 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 05:24:09,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:09,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239758152] [2021-06-05 05:24:09,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239758152] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:09,527 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:09,527 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2021-06-05 05:24:09,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260054670] [2021-06-05 05:24:09,528 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:24:09,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:09,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:24:09,529 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:24:09,535 INFO L87 Difference]: Start difference. First operand 931 states and 3519 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:09,616 INFO L93 Difference]: Finished difference Result 1126 states and 4123 transitions. [2021-06-05 05:24:09,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:24:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:24:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:09,623 INFO L225 Difference]: With dead ends: 1126 [2021-06-05 05:24:09,623 INFO L226 Difference]: Without dead ends: 1044 [2021-06-05 05:24:09,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 51.9ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:24:09,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1044 states. [2021-06-05 05:24:09,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1044 to 845. [2021-06-05 05:24:09,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 3.7831753554502368) internal successors, (3193), 844 states have internal predecessors, (3193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 3193 transitions. [2021-06-05 05:24:09,657 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 3193 transitions. Word has length 27 [2021-06-05 05:24:09,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:09,657 INFO L482 AbstractCegarLoop]: Abstraction has 845 states and 3193 transitions. [2021-06-05 05:24:09,657 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,657 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 3193 transitions. [2021-06-05 05:24:09,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:24:09,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:09,660 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] [2021-06-05 05:24:09,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-06-05 05:24:09,661 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:09,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:09,661 INFO L82 PathProgramCache]: Analyzing trace with hash 2011026324, now seen corresponding path program 2 times [2021-06-05 05:24:09,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:09,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836700295] [2021-06-05 05:24:09,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:09,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:09,707 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 05:24:09,708 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:09,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836700295] [2021-06-05 05:24:09,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836700295] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:09,708 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:09,709 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:24:09,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985775441] [2021-06-05 05:24:09,709 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:24:09,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:09,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:24:09,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:24:09,713 INFO L87 Difference]: Start difference. First operand 845 states and 3193 transitions. Second operand has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:09,800 INFO L93 Difference]: Finished difference Result 1296 states and 4868 transitions. [2021-06-05 05:24:09,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:24:09,801 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:24:09,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:09,808 INFO L225 Difference]: With dead ends: 1296 [2021-06-05 05:24:09,808 INFO L226 Difference]: Without dead ends: 1276 [2021-06-05 05:24:09,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 34.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:24:09,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1276 states. [2021-06-05 05:24:09,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1276 to 897. [2021-06-05 05:24:09,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 3.8359375) internal successors, (3437), 896 states have internal predecessors, (3437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3437 transitions. [2021-06-05 05:24:09,843 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3437 transitions. Word has length 27 [2021-06-05 05:24:09,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:09,844 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3437 transitions. [2021-06-05 05:24:09,844 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.4) internal successors, (27), 4 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:09,844 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3437 transitions. [2021-06-05 05:24:09,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:24:09,850 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:09,851 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] [2021-06-05 05:24:09,851 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-06-05 05:24:09,851 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:09,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:09,851 INFO L82 PathProgramCache]: Analyzing trace with hash 30382996, now seen corresponding path program 3 times [2021-06-05 05:24:09,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:09,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781980904] [2021-06-05 05:24:09,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:09,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:09,925 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 05:24:09,926 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:09,926 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781980904] [2021-06-05 05:24:09,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781980904] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:09,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:09,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:24:09,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332221415] [2021-06-05 05:24:09,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:24:09,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:09,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:24:09,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:24:09,928 INFO L87 Difference]: Start difference. First operand 897 states and 3437 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:10,039 INFO L93 Difference]: Finished difference Result 1772 states and 6736 transitions. [2021-06-05 05:24:10,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:24:10,040 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:24:10,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:10,051 INFO L225 Difference]: With dead ends: 1772 [2021-06-05 05:24:10,051 INFO L226 Difference]: Without dead ends: 1752 [2021-06-05 05:24:10,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 63.7ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:24:10,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1752 states. [2021-06-05 05:24:10,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1752 to 1021. [2021-06-05 05:24:10,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1021 states, 1020 states have (on average 3.9323529411764704) internal successors, (4011), 1020 states have internal predecessors, (4011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1021 states to 1021 states and 4011 transitions. [2021-06-05 05:24:10,096 INFO L78 Accepts]: Start accepts. Automaton has 1021 states and 4011 transitions. Word has length 27 [2021-06-05 05:24:10,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:10,098 INFO L482 AbstractCegarLoop]: Abstraction has 1021 states and 4011 transitions. [2021-06-05 05:24:10,102 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,102 INFO L276 IsEmpty]: Start isEmpty. Operand 1021 states and 4011 transitions. [2021-06-05 05:24:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-06-05 05:24:10,106 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:10,106 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] [2021-06-05 05:24:10,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-06-05 05:24:10,106 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:10,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:10,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1548229740, now seen corresponding path program 4 times [2021-06-05 05:24:10,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:10,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79725243] [2021-06-05 05:24:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:10,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:10,188 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 05:24:10,188 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:10,188 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79725243] [2021-06-05 05:24:10,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79725243] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:10,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:10,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-06-05 05:24:10,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379528921] [2021-06-05 05:24:10,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-06-05 05:24:10,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:10,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-06-05 05:24:10,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-06-05 05:24:10,190 INFO L87 Difference]: Start difference. First operand 1021 states and 4011 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:10,259 INFO L93 Difference]: Finished difference Result 1137 states and 4479 transitions. [2021-06-05 05:24:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:24:10,259 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-06-05 05:24:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:10,267 INFO L225 Difference]: With dead ends: 1137 [2021-06-05 05:24:10,267 INFO L226 Difference]: Without dead ends: 1137 [2021-06-05 05:24:10,267 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 47.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:24:10,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137 states. [2021-06-05 05:24:10,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1137 to 929. [2021-06-05 05:24:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 929 states, 928 states have (on average 3.9364224137931036) internal successors, (3653), 928 states have internal predecessors, (3653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 929 states to 929 states and 3653 transitions. [2021-06-05 05:24:10,297 INFO L78 Accepts]: Start accepts. Automaton has 929 states and 3653 transitions. Word has length 27 [2021-06-05 05:24:10,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:10,298 INFO L482 AbstractCegarLoop]: Abstraction has 929 states and 3653 transitions. [2021-06-05 05:24:10,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,298 INFO L276 IsEmpty]: Start isEmpty. Operand 929 states and 3653 transitions. [2021-06-05 05:24:10,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:24:10,301 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:10,301 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] [2021-06-05 05:24:10,301 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-06-05 05:24:10,301 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:10,302 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:10,302 INFO L82 PathProgramCache]: Analyzing trace with hash 1875081166, now seen corresponding path program 1 times [2021-06-05 05:24:10,302 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:10,302 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56816547] [2021-06-05 05:24:10,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:10,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:10,343 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 05:24:10,343 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:10,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56816547] [2021-06-05 05:24:10,344 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [56816547] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:10,344 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472007371] [2021-06-05 05:24:10,344 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 05:24:10,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:10,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 5 conjunts are in the unsatisfiable core [2021-06-05 05:24:10,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:10,703 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 05:24:10,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472007371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:10,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:10,704 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 05:24:10,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933723252] [2021-06-05 05:24:10,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 05:24:10,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:10,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 05:24:10,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:24:10,705 INFO L87 Difference]: Start difference. First operand 929 states and 3653 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:10,816 INFO L93 Difference]: Finished difference Result 1388 states and 5211 transitions. [2021-06-05 05:24:10,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:24:10,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:24:10,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:10,829 INFO L225 Difference]: With dead ends: 1388 [2021-06-05 05:24:10,829 INFO L226 Difference]: Without dead ends: 1388 [2021-06-05 05:24:10,829 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 107.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:24:10,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1388 states. [2021-06-05 05:24:10,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1388 to 1027. [2021-06-05 05:24:10,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1027 states, 1026 states have (on average 3.8703703703703702) internal successors, (3971), 1026 states have internal predecessors, (3971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1027 states to 1027 states and 3971 transitions. [2021-06-05 05:24:10,874 INFO L78 Accepts]: Start accepts. Automaton has 1027 states and 3971 transitions. Word has length 29 [2021-06-05 05:24:10,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:10,874 INFO L482 AbstractCegarLoop]: Abstraction has 1027 states and 3971 transitions. [2021-06-05 05:24:10,875 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 9 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:10,875 INFO L276 IsEmpty]: Start isEmpty. Operand 1027 states and 3971 transitions. [2021-06-05 05:24:10,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-06-05 05:24:10,878 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:10,878 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] [2021-06-05 05:24:11,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-06-05 05:24:11,101 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:11,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:11,101 INFO L82 PathProgramCache]: Analyzing trace with hash -775253682, now seen corresponding path program 2 times [2021-06-05 05:24:11,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:11,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308775411] [2021-06-05 05:24:11,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:11,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:11,141 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:11,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:11,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308775411] [2021-06-05 05:24:11,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308775411] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:11,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:11,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-06-05 05:24:11,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143984605] [2021-06-05 05:24:11,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:24:11,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:11,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:24:11,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-06-05 05:24:11,143 INFO L87 Difference]: Start difference. First operand 1027 states and 3971 transitions. Second operand has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:11,196 INFO L93 Difference]: Finished difference Result 1113 states and 4299 transitions. [2021-06-05 05:24:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-06-05 05:24:11,197 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-06-05 05:24:11,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:11,203 INFO L225 Difference]: With dead ends: 1113 [2021-06-05 05:24:11,203 INFO L226 Difference]: Without dead ends: 1113 [2021-06-05 05:24:11,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 32.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 05:24:11,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1113 states. [2021-06-05 05:24:11,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1113 to 955. [2021-06-05 05:24:11,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 955 states, 954 states have (on average 3.846960167714885) internal successors, (3670), 954 states have internal predecessors, (3670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 955 states to 955 states and 3670 transitions. [2021-06-05 05:24:11,231 INFO L78 Accepts]: Start accepts. Automaton has 955 states and 3670 transitions. Word has length 29 [2021-06-05 05:24:11,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:11,232 INFO L482 AbstractCegarLoop]: Abstraction has 955 states and 3670 transitions. [2021-06-05 05:24:11,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.8) internal successors, (29), 4 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,233 INFO L276 IsEmpty]: Start isEmpty. Operand 955 states and 3670 transitions. [2021-06-05 05:24:11,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:24:11,236 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:11,236 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] [2021-06-05 05:24:11,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2021-06-05 05:24:11,237 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:11,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:11,237 INFO L82 PathProgramCache]: Analyzing trace with hash -1393715960, now seen corresponding path program 1 times [2021-06-05 05:24:11,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:11,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560959600] [2021-06-05 05:24:11,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:11,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:11,286 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:11,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:11,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560959600] [2021-06-05 05:24:11,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560959600] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:11,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102429515] [2021-06-05 05:24:11,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:11,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:11,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:24:11,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:11,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:11,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102429515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:11,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:11,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-06-05 05:24:11,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289463473] [2021-06-05 05:24:11,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-06-05 05:24:11,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:11,464 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-06-05 05:24:11,464 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-06-05 05:24:11,464 INFO L87 Difference]: Start difference. First operand 955 states and 3670 transitions. Second operand has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:11,537 INFO L93 Difference]: Finished difference Result 1404 states and 5202 transitions. [2021-06-05 05:24:11,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:24:11,537 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:24:11,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:11,560 INFO L225 Difference]: With dead ends: 1404 [2021-06-05 05:24:11,560 INFO L226 Difference]: Without dead ends: 1404 [2021-06-05 05:24:11,560 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:24:11,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1404 states. [2021-06-05 05:24:11,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1404 to 1036. [2021-06-05 05:24:11,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1036 states, 1035 states have (on average 3.7980676328502416) internal successors, (3931), 1035 states have internal predecessors, (3931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1036 states to 1036 states and 3931 transitions. [2021-06-05 05:24:11,593 INFO L78 Accepts]: Start accepts. Automaton has 1036 states and 3931 transitions. Word has length 31 [2021-06-05 05:24:11,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:11,594 INFO L482 AbstractCegarLoop]: Abstraction has 1036 states and 3931 transitions. [2021-06-05 05:24:11,595 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 7.0) internal successors, (49), 7 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 1036 states and 3931 transitions. [2021-06-05 05:24:11,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-06-05 05:24:11,598 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:11,598 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] [2021-06-05 05:24:11,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 05:24:11,821 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:11,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:11,822 INFO L82 PathProgramCache]: Analyzing trace with hash -1732283312, now seen corresponding path program 2 times [2021-06-05 05:24:11,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:11,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402725745] [2021-06-05 05:24:11,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:11,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:11,869 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:11,870 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:11,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402725745] [2021-06-05 05:24:11,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402725745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:11,870 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977699505] [2021-06-05 05:24:11,870 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 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 05:24:11,934 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:11,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:11,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 05:24:11,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:12,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:12,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977699505] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:12,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 05:24:12,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 9 [2021-06-05 05:24:12,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150723667] [2021-06-05 05:24:12,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 05:24:12,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:12,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 05:24:12,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-06-05 05:24:12,030 INFO L87 Difference]: Start difference. First operand 1036 states and 3931 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:12,063 INFO L93 Difference]: Finished difference Result 1123 states and 4234 transitions. [2021-06-05 05:24:12,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 05:24:12,064 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-06-05 05:24:12,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:12,068 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 05:24:12,068 INFO L226 Difference]: Without dead ends: 1063 [2021-06-05 05:24:12,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 53.3ms TimeCoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:24:12,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1063 states. [2021-06-05 05:24:12,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1063 to 916. [2021-06-05 05:24:12,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 3.814207650273224) internal successors, (3490), 915 states have internal predecessors, (3490), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 3490 transitions. [2021-06-05 05:24:12,117 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 3490 transitions. Word has length 31 [2021-06-05 05:24:12,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:12,117 INFO L482 AbstractCegarLoop]: Abstraction has 916 states and 3490 transitions. [2021-06-05 05:24:12,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 5 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,117 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 3490 transitions. [2021-06-05 05:24:12,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:24:12,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:12,120 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 05:24:12,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-06-05 05:24:12,343 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:12,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:12,343 INFO L82 PathProgramCache]: Analyzing trace with hash -237850558, now seen corresponding path program 1 times [2021-06-05 05:24:12,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:12,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704509671] [2021-06-05 05:24:12,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:12,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:12,421 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:12,422 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:12,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704509671] [2021-06-05 05:24:12,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704509671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:12,422 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487089900] [2021-06-05 05:24:12,422 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 05:24:12,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:12,467 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:24:12,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:12,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:12,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487089900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:12,564 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:12,564 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-06-05 05:24:12,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283044498] [2021-06-05 05:24:12,564 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:24:12,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:12,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:24:12,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:24:12,565 INFO L87 Difference]: Start difference. First operand 916 states and 3490 transitions. Second operand has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:12,643 INFO L93 Difference]: Finished difference Result 3683 states and 13665 transitions. [2021-06-05 05:24:12,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:24:12,643 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 05:24:12,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:12,656 INFO L225 Difference]: With dead ends: 3683 [2021-06-05 05:24:12,656 INFO L226 Difference]: Without dead ends: 3245 [2021-06-05 05:24:12,656 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 63.8ms TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:24:12,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3245 states. [2021-06-05 05:24:12,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3245 to 2020. [2021-06-05 05:24:12,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2020 states, 2019 states have (on average 3.8959881129271916) internal successors, (7866), 2019 states have internal predecessors, (7866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2020 states to 2020 states and 7866 transitions. [2021-06-05 05:24:12,736 INFO L78 Accepts]: Start accepts. Automaton has 2020 states and 7866 transitions. Word has length 33 [2021-06-05 05:24:12,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:12,736 INFO L482 AbstractCegarLoop]: Abstraction has 2020 states and 7866 transitions. [2021-06-05 05:24:12,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.7272727272727275) internal successors, (63), 11 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:12,737 INFO L276 IsEmpty]: Start isEmpty. Operand 2020 states and 7866 transitions. [2021-06-05 05:24:12,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:24:12,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:12,743 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 05:24:12,967 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:12,967 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:12,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:12,968 INFO L82 PathProgramCache]: Analyzing trace with hash -1992632042, now seen corresponding path program 2 times [2021-06-05 05:24:12,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:12,968 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307529425] [2021-06-05 05:24:12,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:12,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:13,043 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:13,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:13,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307529425] [2021-06-05 05:24:13,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307529425] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:13,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202122755] [2021-06-05 05:24:13,044 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 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 05:24:13,088 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:13,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:13,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:24:13,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:13,186 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:13,187 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202122755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:13,187 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:13,187 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 10 [2021-06-05 05:24:13,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922405446] [2021-06-05 05:24:13,187 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:24:13,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:13,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:24:13,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:24:13,188 INFO L87 Difference]: Start difference. First operand 2020 states and 7866 transitions. Second operand has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:13,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:13,291 INFO L93 Difference]: Finished difference Result 5705 states and 21618 transitions. [2021-06-05 05:24:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:24:13,291 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 05:24:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:13,311 INFO L225 Difference]: With dead ends: 5705 [2021-06-05 05:24:13,311 INFO L226 Difference]: Without dead ends: 5282 [2021-06-05 05:24:13,312 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 59.2ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:24:13,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5282 states. [2021-06-05 05:24:13,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5282 to 2797. [2021-06-05 05:24:13,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2797 states, 2796 states have (on average 3.987839771101574) internal successors, (11150), 2796 states have internal predecessors, (11150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:13,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2797 states to 2797 states and 11150 transitions. [2021-06-05 05:24:13,416 INFO L78 Accepts]: Start accepts. Automaton has 2797 states and 11150 transitions. Word has length 33 [2021-06-05 05:24:13,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:13,416 INFO L482 AbstractCegarLoop]: Abstraction has 2797 states and 11150 transitions. [2021-06-05 05:24:13,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.0) internal successors, (60), 10 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:13,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2797 states and 11150 transitions. [2021-06-05 05:24:13,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-06-05 05:24:13,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:13,425 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 05:24:13,640 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-06-05 05:24:13,641 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:13,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:13,641 INFO L82 PathProgramCache]: Analyzing trace with hash 1695022730, now seen corresponding path program 3 times [2021-06-05 05:24:13,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:13,641 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154130367] [2021-06-05 05:24:13,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:13,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:13,703 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:13,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154130367] [2021-06-05 05:24:13,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154130367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:13,703 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699328123] [2021-06-05 05:24:13,703 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 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 05:24:13,767 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:24:13,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:13,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 05:24:13,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:13,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:13,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699328123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:13,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:13,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 05:24:13,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083926211] [2021-06-05 05:24:13,882 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:24:13,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:13,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:24:13,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:24:13,883 INFO L87 Difference]: Start difference. First operand 2797 states and 11150 transitions. Second operand has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:13,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:13,987 INFO L93 Difference]: Finished difference Result 5724 states and 21929 transitions. [2021-06-05 05:24:13,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-06-05 05:24:13,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 05:24:13,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:14,014 INFO L225 Difference]: With dead ends: 5724 [2021-06-05 05:24:14,014 INFO L226 Difference]: Without dead ends: 5132 [2021-06-05 05:24:14,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 80.5ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:24:14,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-05 05:24:14,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 2475. [2021-06-05 05:24:14,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2475 states, 2474 states have (on average 3.900565885206144) internal successors, (9650), 2474 states have internal predecessors, (9650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2475 states to 2475 states and 9650 transitions. [2021-06-05 05:24:14,106 INFO L78 Accepts]: Start accepts. Automaton has 2475 states and 9650 transitions. Word has length 33 [2021-06-05 05:24:14,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:14,106 INFO L482 AbstractCegarLoop]: Abstraction has 2475 states and 9650 transitions. [2021-06-05 05:24:14,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.846153846153846) internal successors, (63), 13 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,106 INFO L276 IsEmpty]: Start isEmpty. Operand 2475 states and 9650 transitions. [2021-06-05 05:24:14,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:24:14,112 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:14,112 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:14,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:14,321 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:14,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:14,321 INFO L82 PathProgramCache]: Analyzing trace with hash -304519936, now seen corresponding path program 4 times [2021-06-05 05:24:14,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:14,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440079650] [2021-06-05 05:24:14,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:14,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:14,372 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:14,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:14,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440079650] [2021-06-05 05:24:14,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440079650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:14,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796855494] [2021-06-05 05:24:14,372 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:24:14,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:14,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:14,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:24:14,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:14,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796855494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:14,542 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:14,542 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-06-05 05:24:14,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698204490] [2021-06-05 05:24:14,542 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:24:14,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:14,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:24:14,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:24:14,543 INFO L87 Difference]: Start difference. First operand 2475 states and 9650 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:14,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:14,951 INFO L93 Difference]: Finished difference Result 6143 states and 23236 transitions. [2021-06-05 05:24:14,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:24:14,951 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:24:14,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:14,974 INFO L225 Difference]: With dead ends: 6143 [2021-06-05 05:24:14,974 INFO L226 Difference]: Without dead ends: 6077 [2021-06-05 05:24:14,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 262.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:24:14,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6077 states. [2021-06-05 05:24:15,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6077 to 2842. [2021-06-05 05:24:15,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2842 states, 2841 states have (on average 3.9010911650827174) internal successors, (11083), 2841 states have internal predecessors, (11083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:15,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2842 states to 2842 states and 11083 transitions. [2021-06-05 05:24:15,110 INFO L78 Accepts]: Start accepts. Automaton has 2842 states and 11083 transitions. Word has length 35 [2021-06-05 05:24:15,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:15,111 INFO L482 AbstractCegarLoop]: Abstraction has 2842 states and 11083 transitions. [2021-06-05 05:24:15,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:15,111 INFO L276 IsEmpty]: Start isEmpty. Operand 2842 states and 11083 transitions. [2021-06-05 05:24:15,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:24:15,118 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:15,119 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:15,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 05:24:15,325 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash 1524858692, now seen corresponding path program 5 times [2021-06-05 05:24:15,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:15,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699841576] [2021-06-05 05:24:15,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:15,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:15,365 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:15,365 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:15,365 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699841576] [2021-06-05 05:24:15,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699841576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:15,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477710211] [2021-06-05 05:24:15,366 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 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 05:24:15,419 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 05:24:15,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:15,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:24:15,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:15,520 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:15,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477710211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:15,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:15,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 05:24:15,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825697458] [2021-06-05 05:24:15,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:24:15,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:15,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:24:15,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:24:15,521 INFO L87 Difference]: Start difference. First operand 2842 states and 11083 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:15,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:15,801 INFO L93 Difference]: Finished difference Result 10702 states and 40797 transitions. [2021-06-05 05:24:15,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:24:15,802 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:24:15,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:15,841 INFO L225 Difference]: With dead ends: 10702 [2021-06-05 05:24:15,841 INFO L226 Difference]: Without dead ends: 10294 [2021-06-05 05:24:15,841 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 169.2ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-06-05 05:24:15,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10294 states. [2021-06-05 05:24:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10294 to 4458. [2021-06-05 05:24:15,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4458 states, 4457 states have (on average 4.070002243661656) internal successors, (18140), 4457 states have internal predecessors, (18140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4458 states to 4458 states and 18140 transitions. [2021-06-05 05:24:16,004 INFO L78 Accepts]: Start accepts. Automaton has 4458 states and 18140 transitions. Word has length 35 [2021-06-05 05:24:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:16,004 INFO L482 AbstractCegarLoop]: Abstraction has 4458 states and 18140 transitions. [2021-06-05 05:24:16,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 4458 states and 18140 transitions. [2021-06-05 05:24:16,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:24:16,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:16,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:16,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 05:24:16,228 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:16,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:16,229 INFO L82 PathProgramCache]: Analyzing trace with hash -355168440, now seen corresponding path program 6 times [2021-06-05 05:24:16,230 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:16,230 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441542716] [2021-06-05 05:24:16,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:16,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:16,286 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:16,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:16,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441542716] [2021-06-05 05:24:16,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441542716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:16,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745026942] [2021-06-05 05:24:16,286 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 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 05:24:16,333 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:24:16,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:16,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:24:16,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:16,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:16,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745026942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:16,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:16,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-06-05 05:24:16,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002148594] [2021-06-05 05:24:16,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:24:16,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:16,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:24:16,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:24:16,508 INFO L87 Difference]: Start difference. First operand 4458 states and 18140 transitions. Second operand has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:17,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:17,068 INFO L93 Difference]: Finished difference Result 7423 states and 28628 transitions. [2021-06-05 05:24:17,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 05:24:17,068 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:24:17,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:17,093 INFO L225 Difference]: With dead ends: 7423 [2021-06-05 05:24:17,093 INFO L226 Difference]: Without dead ends: 7391 [2021-06-05 05:24:17,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 393.4ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 05:24:17,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7391 states. [2021-06-05 05:24:17,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7391 to 4655. [2021-06-05 05:24:17,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.056940266437473) internal successors, (18881), 4654 states have internal predecessors, (18881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:17,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 18881 transitions. [2021-06-05 05:24:17,246 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 18881 transitions. Word has length 35 [2021-06-05 05:24:17,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:17,246 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 18881 transitions. [2021-06-05 05:24:17,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 5.25) internal successors, (63), 12 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:17,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 18881 transitions. [2021-06-05 05:24:17,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:24:17,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:17,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:17,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-06-05 05:24:17,473 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash -1441421880, now seen corresponding path program 7 times [2021-06-05 05:24:17,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:17,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147097743] [2021-06-05 05:24:17,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:17,532 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:17,532 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:17,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147097743] [2021-06-05 05:24:17,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147097743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:17,532 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984187355] [2021-06-05 05:24:17,532 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 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 05:24:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:17,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:24:17,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:17,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984187355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:17,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:17,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-06-05 05:24:17,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158875546] [2021-06-05 05:24:17,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:24:17,789 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:17,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:24:17,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:24:17,789 INFO L87 Difference]: Start difference. First operand 4655 states and 18881 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:18,348 INFO L93 Difference]: Finished difference Result 17746 states and 70993 transitions. [2021-06-05 05:24:18,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 05:24:18,349 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:24:18,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:18,403 INFO L225 Difference]: With dead ends: 17746 [2021-06-05 05:24:18,403 INFO L226 Difference]: Without dead ends: 17648 [2021-06-05 05:24:18,404 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 393.0ms TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2021-06-05 05:24:18,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17648 states. [2021-06-05 05:24:18,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17648 to 7394. [2021-06-05 05:24:18,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7394 states, 7393 states have (on average 4.241579872852698) internal successors, (31358), 7393 states have internal predecessors, (31358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7394 states to 7394 states and 31358 transitions. [2021-06-05 05:24:18,700 INFO L78 Accepts]: Start accepts. Automaton has 7394 states and 31358 transitions. Word has length 35 [2021-06-05 05:24:18,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:18,700 INFO L482 AbstractCegarLoop]: Abstraction has 7394 states and 31358 transitions. [2021-06-05 05:24:18,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:18,700 INFO L276 IsEmpty]: Start isEmpty. Operand 7394 states and 31358 transitions. [2021-06-05 05:24:18,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:24:18,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:18,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:18,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 05:24:18,943 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:18,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:18,943 INFO L82 PathProgramCache]: Analyzing trace with hash -1322322868, now seen corresponding path program 8 times [2021-06-05 05:24:18,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:18,943 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989967287] [2021-06-05 05:24:18,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:18,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:18,986 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:18,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:18,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989967287] [2021-06-05 05:24:18,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989967287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:18,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035916144] [2021-06-05 05:24:18,987 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 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 05:24:19,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:19,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:19,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:24:19,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:19,192 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:19,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1035916144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:19,192 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:19,192 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-06-05 05:24:19,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791972762] [2021-06-05 05:24:19,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:24:19,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:19,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:24:19,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=95, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:24:19,199 INFO L87 Difference]: Start difference. First operand 7394 states and 31358 transitions. Second operand has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 05:24:19,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:19,663 INFO L93 Difference]: Finished difference Result 21973 states and 91914 transitions. [2021-06-05 05:24:19,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:24:19,663 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 35 [2021-06-05 05:24:19,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:19,717 INFO L225 Difference]: With dead ends: 21973 [2021-06-05 05:24:19,718 INFO L226 Difference]: Without dead ends: 21443 [2021-06-05 05:24:19,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 241.7ms TimeCoverageRelationStatistics Valid=193, Invalid=457, Unknown=0, NotChecked=0, Total=650 [2021-06-05 05:24:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21443 states. [2021-06-05 05:24:20,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21443 to 8728. [2021-06-05 05:24:20,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8728 states, 8727 states have (on average 4.463274894007104) internal successors, (38951), 8727 states have internal predecessors, (38951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:20,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8728 states to 8728 states and 38951 transitions. [2021-06-05 05:24:20,103 INFO L78 Accepts]: Start accepts. Automaton has 8728 states and 38951 transitions. Word has length 35 [2021-06-05 05:24:20,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:20,103 INFO L482 AbstractCegarLoop]: Abstraction has 8728 states and 38951 transitions. [2021-06-05 05:24:20,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.666666666666667) internal successors, (56), 11 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 05:24:20,103 INFO L276 IsEmpty]: Start isEmpty. Operand 8728 states and 38951 transitions. [2021-06-05 05:24:20,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:24:20,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:20,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:20,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:20,345 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:20,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:20,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1712284596, now seen corresponding path program 9 times [2021-06-05 05:24:20,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:20,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204871303] [2021-06-05 05:24:20,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:20,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:20,396 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:20,397 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:20,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204871303] [2021-06-05 05:24:20,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204871303] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:20,397 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965638279] [2021-06-05 05:24:20,397 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 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 05:24:20,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:24:20,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:20,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:24:20,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:20,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965638279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:20,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:20,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 05:24:20,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500458649] [2021-06-05 05:24:20,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:24:20,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:20,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:24:20,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:24:20,538 INFO L87 Difference]: Start difference. First operand 8728 states and 38951 transitions. Second operand has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:21,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:21,209 INFO L93 Difference]: Finished difference Result 15939 states and 66344 transitions. [2021-06-05 05:24:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 05:24:21,210 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:24:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:21,244 INFO L225 Difference]: With dead ends: 15939 [2021-06-05 05:24:21,244 INFO L226 Difference]: Without dead ends: 15563 [2021-06-05 05:24:21,245 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 460.3ms TimeCoverageRelationStatistics Valid=407, Invalid=925, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:24:21,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15563 states. [2021-06-05 05:24:21,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15563 to 9935. [2021-06-05 05:24:21,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9935 states, 9934 states have (on average 4.418260519428227) internal successors, (43891), 9934 states have internal predecessors, (43891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:21,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9935 states to 9935 states and 43891 transitions. [2021-06-05 05:24:21,676 INFO L78 Accepts]: Start accepts. Automaton has 9935 states and 43891 transitions. Word has length 35 [2021-06-05 05:24:21,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:21,676 INFO L482 AbstractCegarLoop]: Abstraction has 9935 states and 43891 transitions. [2021-06-05 05:24:21,676 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.2727272727272725) internal successors, (58), 10 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:21,676 INFO L276 IsEmpty]: Start isEmpty. Operand 9935 states and 43891 transitions. [2021-06-05 05:24:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-06-05 05:24:21,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:21,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:21,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:21,921 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:21,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:21,921 INFO L82 PathProgramCache]: Analyzing trace with hash 1290484416, now seen corresponding path program 10 times [2021-06-05 05:24:21,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:21,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243705082] [2021-06-05 05:24:21,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:21,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:21,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:21,950 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:21,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243705082] [2021-06-05 05:24:21,950 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243705082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:21,950 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029255669] [2021-06-05 05:24:21,950 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 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 05:24:21,999 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:21,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:22,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:24:22,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:22,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029255669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:22,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:22,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 9 [2021-06-05 05:24:22,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176601859] [2021-06-05 05:24:22,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:24:22,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:22,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:24:22,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:24:22,173 INFO L87 Difference]: Start difference. First operand 9935 states and 43891 transitions. Second operand has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:22,453 INFO L93 Difference]: Finished difference Result 17650 states and 76018 transitions. [2021-06-05 05:24:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:24:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-06-05 05:24:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:22,498 INFO L225 Difference]: With dead ends: 17650 [2021-06-05 05:24:22,498 INFO L226 Difference]: Without dead ends: 17578 [2021-06-05 05:24:22,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 116.8ms TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2021-06-05 05:24:22,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17578 states. [2021-06-05 05:24:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17578 to 12387. [2021-06-05 05:24:22,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12387 states, 12386 states have (on average 4.56353948005813) internal successors, (56524), 12386 states have internal predecessors, (56524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12387 states to 12387 states and 56524 transitions. [2021-06-05 05:24:22,917 INFO L78 Accepts]: Start accepts. Automaton has 12387 states and 56524 transitions. Word has length 35 [2021-06-05 05:24:22,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:22,917 INFO L482 AbstractCegarLoop]: Abstraction has 12387 states and 56524 transitions. [2021-06-05 05:24:22,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 5.5) internal successors, (55), 9 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:22,918 INFO L276 IsEmpty]: Start isEmpty. Operand 12387 states and 56524 transitions. [2021-06-05 05:24:22,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:24:22,948 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:22,948 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, 1, 1, 1] [2021-06-05 05:24:23,151 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 05:24:23,151 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:23,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:23,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1130396630, now seen corresponding path program 11 times [2021-06-05 05:24:23,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:23,152 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928257493] [2021-06-05 05:24:23,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:23,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:23,287 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:24:23,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928257493] [2021-06-05 05:24:23,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928257493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:23,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [712841974] [2021-06-05 05:24:23,288 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 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 05:24:23,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:23,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:23,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 05:24:23,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:23,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [712841974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:23,415 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:23,415 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-06-05 05:24:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333228779] [2021-06-05 05:24:23,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 05:24:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 05:24:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-06-05 05:24:23,416 INFO L87 Difference]: Start difference. First operand 12387 states and 56524 transitions. Second operand has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:24,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:24,249 INFO L93 Difference]: Finished difference Result 47667 states and 212153 transitions. [2021-06-05 05:24:24,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:24:24,249 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:24:24,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:24,520 INFO L225 Difference]: With dead ends: 47667 [2021-06-05 05:24:24,520 INFO L226 Difference]: Without dead ends: 46072 [2021-06-05 05:24:24,521 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 261.7ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-06-05 05:24:24,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46072 states. [2021-06-05 05:24:25,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46072 to 27040. [2021-06-05 05:24:25,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27040 states, 27039 states have (on average 4.81733791930175) internal successors, (130256), 27039 states have internal predecessors, (130256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:25,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27040 states to 27040 states and 130256 transitions. [2021-06-05 05:24:25,660 INFO L78 Accepts]: Start accepts. Automaton has 27040 states and 130256 transitions. Word has length 37 [2021-06-05 05:24:25,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:25,660 INFO L482 AbstractCegarLoop]: Abstraction has 27040 states and 130256 transitions. [2021-06-05 05:24:25,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 5.363636363636363) internal successors, (59), 11 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:25,661 INFO L276 IsEmpty]: Start isEmpty. Operand 27040 states and 130256 transitions. [2021-06-05 05:24:25,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:24:25,913 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:25,913 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, 1, 1, 1] [2021-06-05 05:24:26,113 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:26,113 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:26,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:26,114 INFO L82 PathProgramCache]: Analyzing trace with hash 483536730, now seen corresponding path program 12 times [2021-06-05 05:24:26,114 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:26,114 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224590471] [2021-06-05 05:24:26,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:26,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:26,169 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:26,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:26,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224590471] [2021-06-05 05:24:26,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224590471] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:26,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499541923] [2021-06-05 05:24:26,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 05:24:26,205 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 05:24:26,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:26,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:24:26,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:26,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:26,328 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499541923] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:26,328 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:26,328 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 05:24:26,328 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778996356] [2021-06-05 05:24:26,329 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:24:26,329 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:26,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:24:26,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:24:26,329 INFO L87 Difference]: Start difference. First operand 27040 states and 130256 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:26,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:26,964 INFO L93 Difference]: Finished difference Result 41877 states and 190705 transitions. [2021-06-05 05:24:26,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:24:26,964 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:24:26,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:27,312 INFO L225 Difference]: With dead ends: 41877 [2021-06-05 05:24:27,312 INFO L226 Difference]: Without dead ends: 41385 [2021-06-05 05:24:27,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 244.3ms TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2021-06-05 05:24:27,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41385 states. [2021-06-05 05:24:27,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41385 to 26074. [2021-06-05 05:24:28,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26074 states, 26073 states have (on average 4.745944080082844) internal successors, (123741), 26073 states have internal predecessors, (123741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:28,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26074 states to 26074 states and 123741 transitions. [2021-06-05 05:24:28,103 INFO L78 Accepts]: Start accepts. Automaton has 26074 states and 123741 transitions. Word has length 37 [2021-06-05 05:24:28,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:28,103 INFO L482 AbstractCegarLoop]: Abstraction has 26074 states and 123741 transitions. [2021-06-05 05:24:28,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:28,104 INFO L276 IsEmpty]: Start isEmpty. Operand 26074 states and 123741 transitions. [2021-06-05 05:24:28,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:24:28,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:28,170 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, 1, 1, 1] [2021-06-05 05:24:28,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 05:24:28,385 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:28,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:28,385 INFO L82 PathProgramCache]: Analyzing trace with hash 2021180106, now seen corresponding path program 13 times [2021-06-05 05:24:28,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:28,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084575503] [2021-06-05 05:24:28,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:28,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:28,431 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:28,431 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:28,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084575503] [2021-06-05 05:24:28,431 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084575503] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:28,431 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264612681] [2021-06-05 05:24:28,431 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 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 05:24:28,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:28,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:24:28,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:28,587 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:28,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264612681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:28,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:28,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-06-05 05:24:28,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043813284] [2021-06-05 05:24:28,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 05:24:28,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:28,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 05:24:28,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-06-05 05:24:28,588 INFO L87 Difference]: Start difference. First operand 26074 states and 123741 transitions. Second operand has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:28,850 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 10 [2021-06-05 05:24:29,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:29,458 INFO L93 Difference]: Finished difference Result 55329 states and 256839 transitions. [2021-06-05 05:24:29,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 05:24:29,459 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:24:29,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:29,918 INFO L225 Difference]: With dead ends: 55329 [2021-06-05 05:24:29,919 INFO L226 Difference]: Without dead ends: 54965 [2021-06-05 05:24:29,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 427.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:24:29,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54965 states. [2021-06-05 05:24:30,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54965 to 37282. [2021-06-05 05:24:30,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37282 states, 37281 states have (on average 4.838925994474397) internal successors, (180400), 37281 states have internal predecessors, (180400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37282 states to 37282 states and 180400 transitions. [2021-06-05 05:24:31,104 INFO L78 Accepts]: Start accepts. Automaton has 37282 states and 180400 transitions. Word has length 37 [2021-06-05 05:24:31,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:31,104 INFO L482 AbstractCegarLoop]: Abstraction has 37282 states and 180400 transitions. [2021-06-05 05:24:31,104 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.833333333333333) internal successors, (58), 12 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,104 INFO L276 IsEmpty]: Start isEmpty. Operand 37282 states and 180400 transitions. [2021-06-05 05:24:31,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-06-05 05:24:31,182 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:31,182 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, 1, 1, 1] [2021-06-05 05:24:31,383 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:31,383 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:31,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:31,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1258701498, now seen corresponding path program 14 times [2021-06-05 05:24:31,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:31,383 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916837513] [2021-06-05 05:24:31,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:31,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:31,401 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:24:31,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:31,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916837513] [2021-06-05 05:24:31,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916837513] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 05:24:31,401 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 05:24:31,401 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-06-05 05:24:31,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769340297] [2021-06-05 05:24:31,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 05:24:31,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:31,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 05:24:31,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:24:31,402 INFO L87 Difference]: Start difference. First operand 37282 states and 180400 transitions. Second operand has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:31,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:31,599 INFO L93 Difference]: Finished difference Result 36224 states and 175246 transitions. [2021-06-05 05:24:31,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 05:24:31,600 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-06-05 05:24:31,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:32,127 INFO L225 Difference]: With dead ends: 36224 [2021-06-05 05:24:32,140 INFO L226 Difference]: Without dead ends: 36156 [2021-06-05 05:24:32,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 05:24:32,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36156 states. [2021-06-05 05:24:32,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36156 to 36036. [2021-06-05 05:24:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36036 states, 36035 states have (on average 4.84787012626613) internal successors, (174693), 36035 states have internal predecessors, (174693), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:33,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36036 states to 36036 states and 174693 transitions. [2021-06-05 05:24:33,305 INFO L78 Accepts]: Start accepts. Automaton has 36036 states and 174693 transitions. Word has length 37 [2021-06-05 05:24:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:33,306 INFO L482 AbstractCegarLoop]: Abstraction has 36036 states and 174693 transitions. [2021-06-05 05:24:33,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 11.333333333333334) internal successors, (34), 3 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 36036 states and 174693 transitions. [2021-06-05 05:24:33,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:24:33,384 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:33,384 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:33,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2021-06-05 05:24:33,384 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:33,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:33,385 INFO L82 PathProgramCache]: Analyzing trace with hash -2111156776, now seen corresponding path program 15 times [2021-06-05 05:24:33,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:33,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378729035] [2021-06-05 05:24:33,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:33,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:33,400 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:24:33,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:33,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378729035] [2021-06-05 05:24:33,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378729035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:33,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556910868] [2021-06-05 05:24:33,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:33,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:24:33,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:33,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:24:33,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:33,546 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:24:33,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556910868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:33,546 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:33,546 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7] total 10 [2021-06-05 05:24:33,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359426262] [2021-06-05 05:24:33,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 05:24:33,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:33,547 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 05:24:33,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-06-05 05:24:33,547 INFO L87 Difference]: Start difference. First operand 36036 states and 174693 transitions. Second operand has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:34,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:34,100 INFO L93 Difference]: Finished difference Result 51586 states and 247229 transitions. [2021-06-05 05:24:34,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:24:34,101 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 05:24:34,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:34,642 INFO L225 Difference]: With dead ends: 51586 [2021-06-05 05:24:34,643 INFO L226 Difference]: Without dead ends: 50003 [2021-06-05 05:24:34,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 149.1ms TimeCoverageRelationStatistics Valid=128, Invalid=292, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:24:34,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50003 states. [2021-06-05 05:24:35,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50003 to 45050. [2021-06-05 05:24:35,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45050 states, 45049 states have (on average 4.900574929521188) internal successors, (220766), 45049 states have internal predecessors, (220766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:36,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45050 states to 45050 states and 220766 transitions. [2021-06-05 05:24:36,102 INFO L78 Accepts]: Start accepts. Automaton has 45050 states and 220766 transitions. Word has length 39 [2021-06-05 05:24:36,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:36,103 INFO L482 AbstractCegarLoop]: Abstraction has 45050 states and 220766 transitions. [2021-06-05 05:24:36,103 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 6.8) internal successors, (68), 10 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:36,103 INFO L276 IsEmpty]: Start isEmpty. Operand 45050 states and 220766 transitions. [2021-06-05 05:24:36,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-06-05 05:24:36,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:36,211 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 05:24:36,411 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 05:24:36,411 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:36,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:36,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1915964464, now seen corresponding path program 16 times [2021-06-05 05:24:36,412 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:36,412 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969112311] [2021-06-05 05:24:36,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:36,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:36,464 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:36,465 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:36,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969112311] [2021-06-05 05:24:36,465 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969112311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:36,465 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252772790] [2021-06-05 05:24:36,465 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:36,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:24:36,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:36,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 05:24:36,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:36,637 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:36,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1252772790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:36,638 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:36,638 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-06-05 05:24:36,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374918116] [2021-06-05 05:24:36,638 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-06-05 05:24:36,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:36,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-06-05 05:24:36,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-06-05 05:24:36,639 INFO L87 Difference]: Start difference. First operand 45050 states and 220766 transitions. Second operand has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:37,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:37,693 INFO L93 Difference]: Finished difference Result 63166 states and 300566 transitions. [2021-06-05 05:24:37,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 05:24:37,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have 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 05:24:37,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:37,994 INFO L225 Difference]: With dead ends: 63166 [2021-06-05 05:24:37,994 INFO L226 Difference]: Without dead ends: 63106 [2021-06-05 05:24:37,994 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 216.4ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-06-05 05:24:38,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63106 states. [2021-06-05 05:24:39,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63106 to 43451. [2021-06-05 05:24:39,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43451 states, 43450 states have (on average 4.851162255466053) internal successors, (210783), 43450 states have internal predecessors, (210783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:39,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43451 states to 43451 states and 210783 transitions. [2021-06-05 05:24:39,279 INFO L78 Accepts]: Start accepts. Automaton has 43451 states and 210783 transitions. Word has length 39 [2021-06-05 05:24:39,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:39,279 INFO L482 AbstractCegarLoop]: Abstraction has 43451 states and 210783 transitions. [2021-06-05 05:24:39,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.615384615384615) internal successors, (60), 12 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:39,280 INFO L276 IsEmpty]: Start isEmpty. Operand 43451 states and 210783 transitions. [2021-06-05 05:24:39,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:24:39,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:39,372 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:24:39,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-06-05 05:24:39,593 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:39,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:39,593 INFO L82 PathProgramCache]: Analyzing trace with hash 1538179198, now seen corresponding path program 17 times [2021-06-05 05:24:39,593 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:39,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204668687] [2021-06-05 05:24:39,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:39,670 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:24:39,671 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:39,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204668687] [2021-06-05 05:24:39,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204668687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:39,671 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204081890] [2021-06-05 05:24:39,671 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:39,709 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:24:39,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:39,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:24:39,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:39,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:24:39,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204081890] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:39,864 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:39,864 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 05:24:39,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228417887] [2021-06-05 05:24:39,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:24:39,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:39,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:24:39,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:24:39,865 INFO L87 Difference]: Start difference. First operand 43451 states and 210783 transitions. Second operand has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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 05:24:40,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:40,251 INFO L93 Difference]: Finished difference Result 49744 states and 234920 transitions. [2021-06-05 05:24:40,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:24:40,252 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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 41 [2021-06-05 05:24:40,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:40,911 INFO L225 Difference]: With dead ends: 49744 [2021-06-05 05:24:40,912 INFO L226 Difference]: Without dead ends: 49407 [2021-06-05 05:24:40,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:24:40,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49407 states. [2021-06-05 05:24:42,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49407 to 46277. [2021-06-05 05:24:42,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46277 states, 46276 states have (on average 4.791684674561328) internal successors, (221740), 46276 states have internal predecessors, (221740), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:42,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46277 states to 46277 states and 221740 transitions. [2021-06-05 05:24:42,382 INFO L78 Accepts]: Start accepts. Automaton has 46277 states and 221740 transitions. Word has length 41 [2021-06-05 05:24:42,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:42,382 INFO L482 AbstractCegarLoop]: Abstraction has 46277 states and 221740 transitions. [2021-06-05 05:24:42,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.214285714285714) internal successors, (73), 14 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 05:24:42,382 INFO L276 IsEmpty]: Start isEmpty. Operand 46277 states and 221740 transitions. [2021-06-05 05:24:42,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:24:42,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:42,473 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:24:42,676 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-06-05 05:24:42,677 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:42,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:42,677 INFO L82 PathProgramCache]: Analyzing trace with hash 591667582, now seen corresponding path program 18 times [2021-06-05 05:24:42,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:42,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1721816228] [2021-06-05 05:24:42,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:42,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:42,736 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:42,736 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:42,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1721816228] [2021-06-05 05:24:42,737 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1721816228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:42,737 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085779249] [2021-06-05 05:24:42,737 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:42,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:24:42,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:42,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:24:42,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:42,883 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:24:42,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085779249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:42,883 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:42,883 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 15 [2021-06-05 05:24:42,883 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641893684] [2021-06-05 05:24:42,884 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:24:42,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:42,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:24:42,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:24:42,884 INFO L87 Difference]: Start difference. First operand 46277 states and 221740 transitions. Second operand has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 05:24:43,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:43,311 INFO L93 Difference]: Finished difference Result 60825 states and 280291 transitions. [2021-06-05 05:24:43,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:24:43,311 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 41 [2021-06-05 05:24:43,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:43,520 INFO L225 Difference]: With dead ends: 60825 [2021-06-05 05:24:43,520 INFO L226 Difference]: Without dead ends: 59259 [2021-06-05 05:24:43,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 86.1ms TimeCoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:24:44,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59259 states. [2021-06-05 05:24:45,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59259 to 52848. [2021-06-05 05:24:45,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52848 states, 52847 states have (on average 4.702499668855375) internal successors, (248513), 52847 states have internal predecessors, (248513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:45,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52848 states to 52848 states and 248513 transitions. [2021-06-05 05:24:45,393 INFO L78 Accepts]: Start accepts. Automaton has 52848 states and 248513 transitions. Word has length 41 [2021-06-05 05:24:45,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:45,393 INFO L482 AbstractCegarLoop]: Abstraction has 52848 states and 248513 transitions. [2021-06-05 05:24:45,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 5.266666666666667) internal successors, (79), 15 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 05:24:45,393 INFO L276 IsEmpty]: Start isEmpty. Operand 52848 states and 248513 transitions. [2021-06-05 05:24:45,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:24:45,514 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:45,514 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:24:45,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 05:24:45,715 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:45,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:45,716 INFO L82 PathProgramCache]: Analyzing trace with hash -261664514, now seen corresponding path program 19 times [2021-06-05 05:24:45,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:45,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544740927] [2021-06-05 05:24:45,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:45,772 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:45,772 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:45,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544740927] [2021-06-05 05:24:45,772 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544740927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:45,772 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633314] [2021-06-05 05:24:45,772 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:45,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:45,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 18 conjunts are in the unsatisfiable core [2021-06-05 05:24:45,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:45,939 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:45,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:45,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:45,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-06-05 05:24:45,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056659630] [2021-06-05 05:24:45,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:24:45,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:45,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:24:45,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:24:45,941 INFO L87 Difference]: Start difference. First operand 52848 states and 248513 transitions. Second operand has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 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 05:24:46,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:46,844 INFO L93 Difference]: Finished difference Result 64976 states and 299967 transitions. [2021-06-05 05:24:46,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:24:46,844 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 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 41 [2021-06-05 05:24:46,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:47,123 INFO L225 Difference]: With dead ends: 64976 [2021-06-05 05:24:47,124 INFO L226 Difference]: Without dead ends: 64453 [2021-06-05 05:24:47,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 127.2ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:24:47,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64453 states. [2021-06-05 05:24:48,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64453 to 58787. [2021-06-05 05:24:48,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58787 states, 58786 states have (on average 4.700591977681761) internal successors, (276329), 58786 states have internal predecessors, (276329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:48,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58787 states to 58787 states and 276329 transitions. [2021-06-05 05:24:48,854 INFO L78 Accepts]: Start accepts. Automaton has 58787 states and 276329 transitions. Word has length 41 [2021-06-05 05:24:48,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:48,855 INFO L482 AbstractCegarLoop]: Abstraction has 58787 states and 276329 transitions. [2021-06-05 05:24:48,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.9375) internal successors, (79), 16 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 05:24:48,855 INFO L276 IsEmpty]: Start isEmpty. Operand 58787 states and 276329 transitions. [2021-06-05 05:24:48,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:24:48,994 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:48,994 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:24:49,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:49,194 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:49,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:49,195 INFO L82 PathProgramCache]: Analyzing trace with hash 1787747650, now seen corresponding path program 20 times [2021-06-05 05:24:49,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:49,195 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531551707] [2021-06-05 05:24:49,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:49,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:49,271 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:49,272 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:49,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531551707] [2021-06-05 05:24:49,272 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531551707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:49,272 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510663440] [2021-06-05 05:24:49,272 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:49,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:24:49,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:49,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:24:49,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:49,430 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:24:49,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510663440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:49,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:49,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 05:24:49,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1750706425] [2021-06-05 05:24:49,431 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:24:49,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:49,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:24:49,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:49,431 INFO L87 Difference]: Start difference. First operand 58787 states and 276329 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 05:24:50,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:50,563 INFO L93 Difference]: Finished difference Result 93655 states and 432022 transitions. [2021-06-05 05:24:50,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 05:24:50,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 41 [2021-06-05 05:24:50,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:50,884 INFO L225 Difference]: With dead ends: 93655 [2021-06-05 05:24:50,884 INFO L226 Difference]: Without dead ends: 91110 [2021-06-05 05:24:50,884 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 111.2ms TimeCoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:24:50,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91110 states. [2021-06-05 05:24:53,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91110 to 76620. [2021-06-05 05:24:53,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76620 states, 76619 states have (on average 4.695597697699005) internal successors, (359772), 76619 states have internal predecessors, (359772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:53,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76620 states to 76620 states and 359772 transitions. [2021-06-05 05:24:53,569 INFO L78 Accepts]: Start accepts. Automaton has 76620 states and 359772 transitions. Word has length 41 [2021-06-05 05:24:53,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:24:53,569 INFO L482 AbstractCegarLoop]: Abstraction has 76620 states and 359772 transitions. [2021-06-05 05:24:53,569 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 05:24:53,569 INFO L276 IsEmpty]: Start isEmpty. Operand 76620 states and 359772 transitions. [2021-06-05 05:24:53,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:24:53,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:24:53,763 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:24:53,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:53,965 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:24:53,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:24:53,965 INFO L82 PathProgramCache]: Analyzing trace with hash 1211267282, now seen corresponding path program 21 times [2021-06-05 05:24:53,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:24:53,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947463016] [2021-06-05 05:24:53,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:24:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:24:54,037 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:54,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:24:54,037 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947463016] [2021-06-05 05:24:54,037 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947463016] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:54,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449590184] [2021-06-05 05:24:54,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:24:54,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:24:54,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:24:54,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:24:54,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:24:54,207 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:24:54,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449590184] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:24:54,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:24:54,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 05:24:54,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474436558] [2021-06-05 05:24:54,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:24:54,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:24:54,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:24:54,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:24:54,209 INFO L87 Difference]: Start difference. First operand 76620 states and 359772 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:24:55,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:24:55,890 INFO L93 Difference]: Finished difference Result 163014 states and 750713 transitions. [2021-06-05 05:24:55,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 05:24:55,890 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:24:55,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:24:57,133 INFO L225 Difference]: With dead ends: 163014 [2021-06-05 05:24:57,133 INFO L226 Difference]: Without dead ends: 159428 [2021-06-05 05:24:57,134 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=84, Invalid=258, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:24:57,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159428 states. [2021-06-05 05:25:00,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159428 to 126993. [2021-06-05 05:25:00,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126993 states, 126992 states have (on average 4.747724266095502) internal successors, (602923), 126992 states have internal predecessors, (602923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:02,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126993 states to 126993 states and 602923 transitions. [2021-06-05 05:25:02,012 INFO L78 Accepts]: Start accepts. Automaton has 126993 states and 602923 transitions. Word has length 41 [2021-06-05 05:25:02,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:02,012 INFO L482 AbstractCegarLoop]: Abstraction has 126993 states and 602923 transitions. [2021-06-05 05:25:02,012 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:02,012 INFO L276 IsEmpty]: Start isEmpty. Operand 126993 states and 602923 transitions. [2021-06-05 05:25:02,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:25:02,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:02,329 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:25:02,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 05:25:02,530 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:02,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:02,530 INFO L82 PathProgramCache]: Analyzing trace with hash 603954758, now seen corresponding path program 22 times [2021-06-05 05:25:02,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:02,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897488683] [2021-06-05 05:25:02,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:02,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:02,601 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:02,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:02,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897488683] [2021-06-05 05:25:02,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897488683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:02,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865443976] [2021-06-05 05:25:02,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:02,641 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:02,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:02,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:25:02,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:02,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:25:02,771 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865443976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:02,772 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:02,772 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 05:25:02,772 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384442883] [2021-06-05 05:25:02,772 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:25:02,772 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:02,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:25:02,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:25:02,773 INFO L87 Difference]: Start difference. First operand 126993 states and 602923 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 05:25:04,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:04,758 INFO L93 Difference]: Finished difference Result 156598 states and 736161 transitions. [2021-06-05 05:25:04,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:25:04,759 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 41 [2021-06-05 05:25:04,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:05,444 INFO L225 Difference]: With dead ends: 156598 [2021-06-05 05:25:05,445 INFO L226 Difference]: Without dead ends: 156198 [2021-06-05 05:25:05,445 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:25:06,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156198 states. [2021-06-05 05:25:09,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156198 to 123212. [2021-06-05 05:25:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123212 states, 123211 states have (on average 4.758925745266251) internal successors, (586352), 123211 states have internal predecessors, (586352), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:11,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123212 states to 123212 states and 586352 transitions. [2021-06-05 05:25:11,222 INFO L78 Accepts]: Start accepts. Automaton has 123212 states and 586352 transitions. Word has length 41 [2021-06-05 05:25:11,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:11,222 INFO L482 AbstractCegarLoop]: Abstraction has 123212 states and 586352 transitions. [2021-06-05 05:25:11,222 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 05:25:11,222 INFO L276 IsEmpty]: Start isEmpty. Operand 123212 states and 586352 transitions. [2021-06-05 05:25:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:25:11,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:11,593 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:25:11,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:11,801 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:11,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:11,801 INFO L82 PathProgramCache]: Analyzing trace with hash 295403914, now seen corresponding path program 23 times [2021-06-05 05:25:11,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:11,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704204966] [2021-06-05 05:25:11,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:11,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:11,879 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:11,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:11,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704204966] [2021-06-05 05:25:11,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704204966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:11,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584983760] [2021-06-05 05:25:11,880 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 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 05:25:11,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:25:11,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:11,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:25:11,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:12,048 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:25:12,048 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584983760] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:12,048 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:12,048 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 05:25:12,048 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466751652] [2021-06-05 05:25:12,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:25:12,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:12,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:25:12,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:25:12,049 INFO L87 Difference]: Start difference. First operand 123212 states and 586352 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 05:25:14,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:14,117 INFO L93 Difference]: Finished difference Result 166888 states and 780472 transitions. [2021-06-05 05:25:14,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:25:14,129 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 41 [2021-06-05 05:25:14,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:14,861 INFO L225 Difference]: With dead ends: 166888 [2021-06-05 05:25:14,861 INFO L226 Difference]: Without dead ends: 163861 [2021-06-05 05:25:14,861 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 121.5ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:25:15,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163861 states. [2021-06-05 05:25:18,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163861 to 96217. [2021-06-05 05:25:18,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96217 states, 96216 states have (on average 4.736894071672071) internal successors, (455765), 96216 states have internal predecessors, (455765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:19,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96217 states to 96217 states and 455765 transitions. [2021-06-05 05:25:19,281 INFO L78 Accepts]: Start accepts. Automaton has 96217 states and 455765 transitions. Word has length 41 [2021-06-05 05:25:19,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:19,281 INFO L482 AbstractCegarLoop]: Abstraction has 96217 states and 455765 transitions. [2021-06-05 05:25:19,281 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 05:25:19,281 INFO L276 IsEmpty]: Start isEmpty. Operand 96217 states and 455765 transitions. [2021-06-05 05:25:19,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:25:19,503 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:19,503 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:25:19,703 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 05:25:19,703 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:19,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:19,704 INFO L82 PathProgramCache]: Analyzing trace with hash -904179714, now seen corresponding path program 24 times [2021-06-05 05:25:19,704 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:19,704 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599431093] [2021-06-05 05:25:19,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:19,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:19,762 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:19,763 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:19,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599431093] [2021-06-05 05:25:19,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599431093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:19,763 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [425151291] [2021-06-05 05:25:19,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:19,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:25:19,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:19,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:25:19,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:19,940 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 11 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:19,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [425151291] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:19,940 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:19,940 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 05:25:19,940 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819942012] [2021-06-05 05:25:19,940 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:25:19,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:19,941 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:25:19,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=165, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:25:19,941 INFO L87 Difference]: Start difference. First operand 96217 states and 455765 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:21,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:21,423 INFO L93 Difference]: Finished difference Result 118313 states and 543700 transitions. [2021-06-05 05:25:21,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-06-05 05:25:21,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:25:21,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:21,917 INFO L225 Difference]: With dead ends: 118313 [2021-06-05 05:25:21,918 INFO L226 Difference]: Without dead ends: 118079 [2021-06-05 05:25:21,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:25:22,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118079 states. [2021-06-05 05:25:24,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118079 to 101978. [2021-06-05 05:25:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101978 states, 101977 states have (on average 4.717151906802514) internal successors, (481041), 101977 states have internal predecessors, (481041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:25,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101978 states to 101978 states and 481041 transitions. [2021-06-05 05:25:25,188 INFO L78 Accepts]: Start accepts. Automaton has 101978 states and 481041 transitions. Word has length 41 [2021-06-05 05:25:25,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:25,188 INFO L482 AbstractCegarLoop]: Abstraction has 101978 states and 481041 transitions. [2021-06-05 05:25:25,188 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:25,188 INFO L276 IsEmpty]: Start isEmpty. Operand 101978 states and 481041 transitions. [2021-06-05 05:25:26,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:25:26,117 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:26,118 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:25:26,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-06-05 05:25:26,342 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:26,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:26,343 INFO L82 PathProgramCache]: Analyzing trace with hash 1636006098, now seen corresponding path program 25 times [2021-06-05 05:25:26,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:26,343 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393036302] [2021-06-05 05:25:26,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:26,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:26,414 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:26,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:26,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393036302] [2021-06-05 05:25:26,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393036302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:26,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351792928] [2021-06-05 05:25:26,414 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:26,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:25:26,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:26,655 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:26,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351792928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:26,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:26,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-06-05 05:25:26,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950619908] [2021-06-05 05:25:26,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:25:26,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:26,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:25:26,657 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:25:26,657 INFO L87 Difference]: Start difference. First operand 101978 states and 481041 transitions. Second operand has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 05:25:27,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:27,529 INFO L93 Difference]: Finished difference Result 131320 states and 606130 transitions. [2021-06-05 05:25:27,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 05:25:27,529 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 41 [2021-06-05 05:25:27,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:29,000 INFO L225 Difference]: With dead ends: 131320 [2021-06-05 05:25:29,000 INFO L226 Difference]: Without dead ends: 130644 [2021-06-05 05:25:29,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:25:29,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130644 states. [2021-06-05 05:25:31,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130644 to 113668. [2021-06-05 05:25:32,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113668 states, 113667 states have (on average 4.706968601265099) internal successors, (535027), 113667 states have internal predecessors, (535027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:33,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113668 states to 113668 states and 535027 transitions. [2021-06-05 05:25:33,071 INFO L78 Accepts]: Start accepts. Automaton has 113668 states and 535027 transitions. Word has length 41 [2021-06-05 05:25:33,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:33,071 INFO L482 AbstractCegarLoop]: Abstraction has 113668 states and 535027 transitions. [2021-06-05 05:25:33,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.647058823529412) internal successors, (79), 17 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 05:25:33,071 INFO L276 IsEmpty]: Start isEmpty. Operand 113668 states and 535027 transitions. [2021-06-05 05:25:33,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:25:33,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:33,358 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:25:33,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-06-05 05:25:33,559 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:33,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:33,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1028693574, now seen corresponding path program 26 times [2021-06-05 05:25:33,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:33,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896812919] [2021-06-05 05:25:33,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:33,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:33,620 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:33,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:33,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896812919] [2021-06-05 05:25:33,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896812919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:33,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497530522] [2021-06-05 05:25:33,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:33,656 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:25:33,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:33,657 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 05:25:33,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:33,812 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:33,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497530522] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:33,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:33,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:25:33,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253562768] [2021-06-05 05:25:33,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:25:33,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:33,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:25:33,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:25:33,813 INFO L87 Difference]: Start difference. First operand 113668 states and 535027 transitions. Second operand has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:35,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:35,393 INFO L93 Difference]: Finished difference Result 140482 states and 651032 transitions. [2021-06-05 05:25:35,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:25:35,394 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:25:35,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:35,969 INFO L225 Difference]: With dead ends: 140482 [2021-06-05 05:25:35,969 INFO L226 Difference]: Without dead ends: 139756 [2021-06-05 05:25:35,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 142.7ms TimeCoverageRelationStatistics Valid=109, Invalid=233, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:25:36,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139756 states. [2021-06-05 05:25:39,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139756 to 118405. [2021-06-05 05:25:39,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118405 states, 118404 states have (on average 4.725110638154116) internal successors, (559472), 118404 states have internal predecessors, (559472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:40,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118405 states to 118405 states and 559472 transitions. [2021-06-05 05:25:40,349 INFO L78 Accepts]: Start accepts. Automaton has 118405 states and 559472 transitions. Word has length 41 [2021-06-05 05:25:40,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:40,349 INFO L482 AbstractCegarLoop]: Abstraction has 118405 states and 559472 transitions. [2021-06-05 05:25:40,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.470588235294118) internal successors, (76), 17 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:40,349 INFO L276 IsEmpty]: Start isEmpty. Operand 118405 states and 559472 transitions. [2021-06-05 05:25:40,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:25:40,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:40,655 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:25:40,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 05:25:40,855 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:40,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:40,856 INFO L82 PathProgramCache]: Analyzing trace with hash 1153866818, now seen corresponding path program 27 times [2021-06-05 05:25:40,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:40,856 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13790394] [2021-06-05 05:25:40,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:40,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:40,930 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:40,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13790394] [2021-06-05 05:25:40,930 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13790394] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:40,930 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1741340517] [2021-06-05 05:25:40,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:40,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:25:40,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:40,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:25:40,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:25:41,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1741340517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:41,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:41,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 05:25:41,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485626297] [2021-06-05 05:25:41,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:25:41,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:41,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:25:41,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:25:41,107 INFO L87 Difference]: Start difference. First operand 118405 states and 559472 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 05:25:42,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:42,980 INFO L93 Difference]: Finished difference Result 186146 states and 866917 transitions. [2021-06-05 05:25:42,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:25:42,987 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 41 [2021-06-05 05:25:42,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:43,750 INFO L225 Difference]: With dead ends: 186146 [2021-06-05 05:25:43,750 INFO L226 Difference]: Without dead ends: 183395 [2021-06-05 05:25:43,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 125.4ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:25:44,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183395 states. [2021-06-05 05:25:48,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183395 to 148831. [2021-06-05 05:25:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148831 states, 148830 states have (on average 4.731868574884096) internal successors, (704244), 148830 states have internal predecessors, (704244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:49,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148831 states to 148831 states and 704244 transitions. [2021-06-05 05:25:49,786 INFO L78 Accepts]: Start accepts. Automaton has 148831 states and 704244 transitions. Word has length 41 [2021-06-05 05:25:49,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:25:49,787 INFO L482 AbstractCegarLoop]: Abstraction has 148831 states and 704244 transitions. [2021-06-05 05:25:49,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 05:25:49,787 INFO L276 IsEmpty]: Start isEmpty. Operand 148831 states and 704244 transitions. [2021-06-05 05:25:50,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:25:50,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:25:50,144 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:25:50,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 05:25:50,345 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:25:50,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:25:50,345 INFO L82 PathProgramCache]: Analyzing trace with hash 577386450, now seen corresponding path program 28 times [2021-06-05 05:25:50,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:25:50,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534744550] [2021-06-05 05:25:50,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:25:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:25:50,416 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:50,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:25:50,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534744550] [2021-06-05 05:25:50,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534744550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:50,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588500941] [2021-06-05 05:25:50,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:25:50,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:25:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:25:50,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:25:50,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:25:51,249 WARN L205 SmtUtils]: Spent 734.00 ms on a formula simplification. DAG size of input: 13 DAG size of output: 12 [2021-06-05 05:25:51,315 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:25:51,315 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588500941] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:25:51,315 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:25:51,315 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 05:25:51,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98693697] [2021-06-05 05:25:51,315 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:25:51,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:25:51,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:25:51,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:25:51,316 INFO L87 Difference]: Start difference. First operand 148831 states and 704244 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:25:54,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:25:54,123 INFO L93 Difference]: Finished difference Result 327820 states and 1534054 transitions. [2021-06-05 05:25:54,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 05:25:54,125 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:25:54,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:25:56,421 INFO L225 Difference]: With dead ends: 327820 [2021-06-05 05:25:56,421 INFO L226 Difference]: Without dead ends: 324633 [2021-06-05 05:25:56,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 166.6ms TimeCoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:25:56,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324633 states. [2021-06-05 05:26:04,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324633 to 239665. [2021-06-05 05:26:05,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239665 states, 239664 states have (on average 4.810242673075639) internal successors, (1152842), 239664 states have internal predecessors, (1152842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:07,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239665 states to 239665 states and 1152842 transitions. [2021-06-05 05:26:07,125 INFO L78 Accepts]: Start accepts. Automaton has 239665 states and 1152842 transitions. Word has length 41 [2021-06-05 05:26:07,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:07,125 INFO L482 AbstractCegarLoop]: Abstraction has 239665 states and 1152842 transitions. [2021-06-05 05:26:07,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:07,125 INFO L276 IsEmpty]: Start isEmpty. Operand 239665 states and 1152842 transitions. [2021-06-05 05:26:08,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:08,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:08,670 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:26:08,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:08,870 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:08,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:08,871 INFO L82 PathProgramCache]: Analyzing trace with hash -29926074, now seen corresponding path program 29 times [2021-06-05 05:26:08,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:08,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175276285] [2021-06-05 05:26:08,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:08,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:08,950 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:08,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:08,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175276285] [2021-06-05 05:26:08,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175276285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:08,952 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849562754] [2021-06-05 05:26:08,952 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:08,984 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:26:08,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:08,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:26:08,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:09,112 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:09,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849562754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:09,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:09,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 05:26:09,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983450571] [2021-06-05 05:26:09,112 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:26:09,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:09,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:26:09,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:26:09,113 INFO L87 Difference]: Start difference. First operand 239665 states and 1152842 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 05:26:12,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:12,529 INFO L93 Difference]: Finished difference Result 283707 states and 1353356 transitions. [2021-06-05 05:26:12,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:26:12,529 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 41 [2021-06-05 05:26:12,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:14,163 INFO L225 Difference]: With dead ends: 283707 [2021-06-05 05:26:14,164 INFO L226 Difference]: Without dead ends: 283245 [2021-06-05 05:26:14,164 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 124.4ms TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:26:14,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283245 states. [2021-06-05 05:26:20,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283245 to 208767. [2021-06-05 05:26:21,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208767 states, 208766 states have (on average 4.808431449565543) internal successors, (1003837), 208766 states have internal predecessors, (1003837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:23,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208767 states to 208767 states and 1003837 transitions. [2021-06-05 05:26:23,111 INFO L78 Accepts]: Start accepts. Automaton has 208767 states and 1003837 transitions. Word has length 41 [2021-06-05 05:26:23,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:23,111 INFO L482 AbstractCegarLoop]: Abstraction has 208767 states and 1003837 transitions. [2021-06-05 05:26:23,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 05:26:23,111 INFO L276 IsEmpty]: Start isEmpty. Operand 208767 states and 1003837 transitions. [2021-06-05 05:26:24,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:24,459 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:24,459 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:26:24,683 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 05:26:24,683 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:24,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:24,683 INFO L82 PathProgramCache]: Analyzing trace with hash -338476918, now seen corresponding path program 30 times [2021-06-05 05:26:24,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:24,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420651361] [2021-06-05 05:26:24,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:24,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:24,863 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:24,863 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:24,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420651361] [2021-06-05 05:26:24,864 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420651361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:24,864 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932094159] [2021-06-05 05:26:24,864 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:24,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:26:24,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:24,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:26:24,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:25,051 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:25,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932094159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:25,052 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:25,052 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 05:26:25,052 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969036417] [2021-06-05 05:26:25,052 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:26:25,052 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:25,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:26:25,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:26:25,053 INFO L87 Difference]: Start difference. First operand 208767 states and 1003837 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 05:26:28,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:28,345 INFO L93 Difference]: Finished difference Result 263379 states and 1254429 transitions. [2021-06-05 05:26:28,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-06-05 05:26:28,345 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 41 [2021-06-05 05:26:28,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:30,345 INFO L225 Difference]: With dead ends: 263379 [2021-06-05 05:26:30,345 INFO L226 Difference]: Without dead ends: 260502 [2021-06-05 05:26:30,346 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 195.1ms TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:26:31,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260502 states. [2021-06-05 05:26:35,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260502 to 116427. [2021-06-05 05:26:35,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116427 states, 116426 states have (on average 4.769922525896278) internal successors, (555343), 116426 states have internal predecessors, (555343), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116427 states to 116427 states and 555343 transitions. [2021-06-05 05:26:36,669 INFO L78 Accepts]: Start accepts. Automaton has 116427 states and 555343 transitions. Word has length 41 [2021-06-05 05:26:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:36,669 INFO L482 AbstractCegarLoop]: Abstraction has 116427 states and 555343 transitions. [2021-06-05 05:26:36,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 05:26:36,669 INFO L276 IsEmpty]: Start isEmpty. Operand 116427 states and 555343 transitions. [2021-06-05 05:26:36,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:36,976 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:36,976 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:26:37,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-06-05 05:26:37,177 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:37,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:37,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1886674710, now seen corresponding path program 31 times [2021-06-05 05:26:37,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:37,177 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666176788] [2021-06-05 05:26:37,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:37,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:37,242 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:37,242 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:37,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666176788] [2021-06-05 05:26:37,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666176788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:37,242 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304025008] [2021-06-05 05:26:37,242 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:37,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:37,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:26:37,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:37,377 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:37,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304025008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:37,377 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:37,377 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-06-05 05:26:37,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747323398] [2021-06-05 05:26:37,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:26:37,378 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:37,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:26:37,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:26:37,378 INFO L87 Difference]: Start difference. First operand 116427 states and 555343 transitions. Second operand has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:39,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:39,569 INFO L93 Difference]: Finished difference Result 223049 states and 1035432 transitions. [2021-06-05 05:26:39,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-06-05 05:26:39,569 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:26:39,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:41,157 INFO L225 Difference]: With dead ends: 223049 [2021-06-05 05:26:41,158 INFO L226 Difference]: Without dead ends: 220377 [2021-06-05 05:26:41,158 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 128.1ms TimeCoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:26:41,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220377 states. [2021-06-05 05:26:46,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220377 to 155837. [2021-06-05 05:26:46,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155837 states, 155836 states have (on average 4.806129520778254) internal successors, (748968), 155836 states have internal predecessors, (748968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155837 states to 155837 states and 748968 transitions. [2021-06-05 05:26:47,979 INFO L78 Accepts]: Start accepts. Automaton has 155837 states and 748968 transitions. Word has length 41 [2021-06-05 05:26:47,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:47,979 INFO L482 AbstractCegarLoop]: Abstraction has 155837 states and 748968 transitions. [2021-06-05 05:26:47,979 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 5.428571428571429) internal successors, (76), 14 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:47,979 INFO L276 IsEmpty]: Start isEmpty. Operand 155837 states and 748968 transitions. [2021-06-05 05:26:48,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:26:48,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:26:48,430 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:26:48,631 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:48,631 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:26:48,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:26:48,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1658788934, now seen corresponding path program 32 times [2021-06-05 05:26:48,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:26:48,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [750156645] [2021-06-05 05:26:48,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:26:48,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:26:48,704 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:26:48,704 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:26:48,704 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [750156645] [2021-06-05 05:26:48,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [750156645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:48,705 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808265774] [2021-06-05 05:26:48,705 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:26:48,746 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:26:48,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:26:48,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:26:48,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:26:48,885 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:26:48,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808265774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:26:48,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:26:48,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-06-05 05:26:48,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902472503] [2021-06-05 05:26:48,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 05:26:48,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:26:48,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 05:26:48,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:26:48,887 INFO L87 Difference]: Start difference. First operand 155837 states and 748968 transitions. Second operand has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 05:26:51,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:26:51,148 INFO L93 Difference]: Finished difference Result 212915 states and 1012751 transitions. [2021-06-05 05:26:51,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 05:26:51,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 41 [2021-06-05 05:26:51,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:26:52,688 INFO L225 Difference]: With dead ends: 212915 [2021-06-05 05:26:52,688 INFO L226 Difference]: Without dead ends: 210423 [2021-06-05 05:26:52,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 132.1ms TimeCoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 05:26:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210423 states. [2021-06-05 05:26:57,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210423 to 174189. [2021-06-05 05:26:58,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174189 states, 174188 states have (on average 4.835143637908467) internal successors, (842224), 174188 states have internal predecessors, (842224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:26:59,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174189 states to 174189 states and 842224 transitions. [2021-06-05 05:26:59,644 INFO L78 Accepts]: Start accepts. Automaton has 174189 states and 842224 transitions. Word has length 41 [2021-06-05 05:26:59,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:26:59,644 INFO L482 AbstractCegarLoop]: Abstraction has 174189 states and 842224 transitions. [2021-06-05 05:26:59,644 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 4.157894736842105) internal successors, (79), 19 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 05:26:59,644 INFO L276 IsEmpty]: Start isEmpty. Operand 174189 states and 842224 transitions. [2021-06-05 05:27:00,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:00,083 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:00,084 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:27:00,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-06-05 05:27:00,284 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:00,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:00,284 INFO L82 PathProgramCache]: Analyzing trace with hash -2084693554, now seen corresponding path program 33 times [2021-06-05 05:27:00,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:00,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160119995] [2021-06-05 05:27:00,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:00,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:00,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:00,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:00,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160119995] [2021-06-05 05:27:00,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160119995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:00,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [966661025] [2021-06-05 05:27:00,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:00,411 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 05:27:00,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:00,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:27:00,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:01,365 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:01,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [966661025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:01,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:01,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-06-05 05:27:01,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498953573] [2021-06-05 05:27:01,366 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:27:01,366 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:01,366 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:27:01,366 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:27:01,366 INFO L87 Difference]: Start difference. First operand 174189 states and 842224 transitions. Second operand has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:05,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:05,577 INFO L93 Difference]: Finished difference Result 397194 states and 1899439 transitions. [2021-06-05 05:27:05,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:27:05,578 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-06-05 05:27:05,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:07,579 INFO L225 Difference]: With dead ends: 397194 [2021-06-05 05:27:07,579 INFO L226 Difference]: Without dead ends: 393877 [2021-06-05 05:27:07,579 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=114, Invalid=392, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:27:08,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393877 states. [2021-06-05 05:27:19,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393877 to 269480. [2021-06-05 05:27:19,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269480 states, 269479 states have (on average 4.951157604117575) internal successors, (1334233), 269479 states have internal predecessors, (1334233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:21,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269480 states to 269480 states and 1334233 transitions. [2021-06-05 05:27:21,920 INFO L78 Accepts]: Start accepts. Automaton has 269480 states and 1334233 transitions. Word has length 41 [2021-06-05 05:27:21,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:21,920 INFO L482 AbstractCegarLoop]: Abstraction has 269480 states and 1334233 transitions. [2021-06-05 05:27:21,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 4.222222222222222) internal successors, (76), 18 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:21,920 INFO L276 IsEmpty]: Start isEmpty. Operand 269480 states and 1334233 transitions. [2021-06-05 05:27:22,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:22,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:22,684 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:27:22,885 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:22,885 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:22,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:22,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1494171274, now seen corresponding path program 34 times [2021-06-05 05:27:22,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:22,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836436332] [2021-06-05 05:27:22,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:22,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:22,964 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 2 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:22,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:22,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836436332] [2021-06-05 05:27:22,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [836436332] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:22,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124936934] [2021-06-05 05:27:22,965 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:22,998 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:27:22,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:22,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:27:22,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:23,137 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:27:23,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124936934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:23,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:23,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 05:27:23,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136543128] [2021-06-05 05:27:23,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:27:23,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:23,138 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:27:23,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:27:23,138 INFO L87 Difference]: Start difference. First operand 269480 states and 1334233 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 05:27:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:27,801 INFO L93 Difference]: Finished difference Result 316931 states and 1549745 transitions. [2021-06-05 05:27:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-06-05 05:27:27,801 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 41 [2021-06-05 05:27:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:30,125 INFO L225 Difference]: With dead ends: 316931 [2021-06-05 05:27:30,125 INFO L226 Difference]: Without dead ends: 316481 [2021-06-05 05:27:30,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 143.7ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:27:31,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 316481 states. [2021-06-05 05:27:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 316481 to 205144. [2021-06-05 05:27:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205144 states, 205143 states have (on average 4.904305776945837) internal successors, (1006084), 205143 states have internal predecessors, (1006084), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:39,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205144 states to 205144 states and 1006084 transitions. [2021-06-05 05:27:39,661 INFO L78 Accepts]: Start accepts. Automaton has 205144 states and 1006084 transitions. Word has length 41 [2021-06-05 05:27:39,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:39,662 INFO L482 AbstractCegarLoop]: Abstraction has 205144 states and 1006084 transitions. [2021-06-05 05:27:39,662 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 05:27:39,662 INFO L276 IsEmpty]: Start isEmpty. Operand 205144 states and 1006084 transitions. [2021-06-05 05:27:40,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-06-05 05:27:40,239 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:27:40,239 INFO L521 BasicCegarLoop]: trace histogram [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, 1] [2021-06-05 05:27:40,439 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-06-05 05:27:40,439 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:27:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:27:40,440 INFO L82 PathProgramCache]: Analyzing trace with hash 518963082, now seen corresponding path program 35 times [2021-06-05 05:27:40,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:27:40,440 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007228607] [2021-06-05 05:27:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:27:40,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:27:40,522 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 1 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 05:27:40,522 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:27:40,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007228607] [2021-06-05 05:27:40,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007228607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:40,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672473015] [2021-06-05 05:27:40,523 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:27:40,569 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 05:27:40,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:27:40,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 05:27:40,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:27:40,727 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 05:27:40,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1672473015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:27:40,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:27:40,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-06-05 05:27:40,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649984201] [2021-06-05 05:27:40,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-06-05 05:27:40,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:27:40,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-06-05 05:27:40,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=337, Unknown=0, NotChecked=0, Total=420 [2021-06-05 05:27:40,729 INFO L87 Difference]: Start difference. First operand 205144 states and 1006084 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 05:27:44,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:27:44,571 INFO L93 Difference]: Finished difference Result 351280 states and 1697991 transitions. [2021-06-05 05:27:44,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 05:27:44,571 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 41 [2021-06-05 05:27:44,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:27:47,016 INFO L225 Difference]: With dead ends: 351280 [2021-06-05 05:27:47,017 INFO L226 Difference]: Without dead ends: 347746 [2021-06-05 05:27:47,017 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 184.7ms TimeCoverageRelationStatistics Valid=98, Invalid=408, Unknown=0, NotChecked=0, Total=506 [2021-06-05 05:27:47,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 347746 states. [2021-06-05 05:27:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 347746 to 266100. [2021-06-05 05:27:56,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266100 states, 266099 states have (on average 4.991721126347713) internal successors, (1328292), 266099 states have internal predecessors, (1328292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:27:59,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266100 states to 266100 states and 1328292 transitions. [2021-06-05 05:27:59,298 INFO L78 Accepts]: Start accepts. Automaton has 266100 states and 1328292 transitions. Word has length 41 [2021-06-05 05:27:59,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:27:59,298 INFO L482 AbstractCegarLoop]: Abstraction has 266100 states and 1328292 transitions. [2021-06-05 05:27:59,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 21 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 05:27:59,299 INFO L276 IsEmpty]: Start isEmpty. Operand 266100 states and 1328292 transitions. [2021-06-05 05:28:00,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:28:00,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:28:00,789 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2021-06-05 05:28:01,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-06-05 05:28:01,009 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:28:01,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:28:01,009 INFO L82 PathProgramCache]: Analyzing trace with hash 445372220, now seen corresponding path program 36 times [2021-06-05 05:28:01,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:28:01,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682297154] [2021-06-05 05:28:01,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:28:01,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:01,067 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:28:01,067 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:28:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682297154] [2021-06-05 05:28:01,067 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682297154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:01,067 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009965310] [2021-06-05 05:28:01,067 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:28:01,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 05:28:01,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:28:01,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:28:01,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:28:01,260 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:28:01,260 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009965310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:01,260 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:28:01,260 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 05:28:01,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329849319] [2021-06-05 05:28:01,260 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:28:01,260 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:28:01,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:28:01,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:28:01,261 INFO L87 Difference]: Start difference. First operand 266100 states and 1328292 transitions. Second operand has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:07,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:28:07,196 INFO L93 Difference]: Finished difference Result 517007 states and 2493362 transitions. [2021-06-05 05:28:07,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 05:28:07,197 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:28:07,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:28:10,830 INFO L225 Difference]: With dead ends: 517007 [2021-06-05 05:28:10,831 INFO L226 Difference]: Without dead ends: 515961 [2021-06-05 05:28:10,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 410.6ms TimeCoverageRelationStatistics Valid=365, Invalid=967, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:28:11,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515961 states. [2021-06-05 05:28:19,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515961 to 210221. [2021-06-05 05:28:19,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210221 states, 210220 states have (on average 4.792717153458282) internal successors, (1007525), 210220 states have internal predecessors, (1007525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:21,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210221 states to 210221 states and 1007525 transitions. [2021-06-05 05:28:21,003 INFO L78 Accepts]: Start accepts. Automaton has 210221 states and 1007525 transitions. Word has length 43 [2021-06-05 05:28:21,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:28:21,003 INFO L482 AbstractCegarLoop]: Abstraction has 210221 states and 1007525 transitions. [2021-06-05 05:28:21,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.588235294117647) internal successors, (61), 17 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:21,003 INFO L276 IsEmpty]: Start isEmpty. Operand 210221 states and 1007525 transitions. [2021-06-05 05:28:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:28:22,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:28:22,983 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2021-06-05 05:28:23,205 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-06-05 05:28:23,205 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:28:23,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:28:23,205 INFO L82 PathProgramCache]: Analyzing trace with hash -172125824, now seen corresponding path program 37 times [2021-06-05 05:28:23,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:28:23,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274928085] [2021-06-05 05:28:23,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:28:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:23,286 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:28:23,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:28:23,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274928085] [2021-06-05 05:28:23,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274928085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:23,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798368375] [2021-06-05 05:28:23,287 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:28:23,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:23,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:28:23,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:28:23,450 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:28:23,450 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798368375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:23,450 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:28:23,450 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-06-05 05:28:23,450 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160554101] [2021-06-05 05:28:23,450 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:28:23,450 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:28:23,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:28:23,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:28:23,452 INFO L87 Difference]: Start difference. First operand 210221 states and 1007525 transitions. Second operand has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:29,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:28:29,802 INFO L93 Difference]: Finished difference Result 490894 states and 2284771 transitions. [2021-06-05 05:28:29,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 05:28:29,802 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:28:29,802 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:28:33,319 INFO L225 Difference]: With dead ends: 490894 [2021-06-05 05:28:33,320 INFO L226 Difference]: Without dead ends: 487402 [2021-06-05 05:28:33,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 407.2ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 05:28:34,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 487402 states. [2021-06-05 05:28:43,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 487402 to 245403. [2021-06-05 05:28:44,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245403 states, 245402 states have (on average 4.805160512139265) internal successors, (1179196), 245402 states have internal predecessors, (1179196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:46,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245403 states to 245403 states and 1179196 transitions. [2021-06-05 05:28:46,313 INFO L78 Accepts]: Start accepts. Automaton has 245403 states and 1179196 transitions. Word has length 43 [2021-06-05 05:28:46,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:28:46,313 INFO L482 AbstractCegarLoop]: Abstraction has 245403 states and 1179196 transitions. [2021-06-05 05:28:46,314 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.533333333333333) internal successors, (68), 14 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:46,314 INFO L276 IsEmpty]: Start isEmpty. Operand 245403 states and 1179196 transitions. [2021-06-05 05:28:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:28:47,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:28:47,927 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2021-06-05 05:28:48,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 05:28:48,127 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:28:48,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:28:48,128 INFO L82 PathProgramCache]: Analyzing trace with hash 1881822596, now seen corresponding path program 38 times [2021-06-05 05:28:48,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:28:48,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287015795] [2021-06-05 05:28:48,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:28:48,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:28:48,174 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:28:48,174 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:28:48,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287015795] [2021-06-05 05:28:48,174 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287015795] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:48,174 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380078260] [2021-06-05 05:28:48,174 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:28:48,210 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:28:48,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:28:48,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:28:48,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:28:48,330 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:28:48,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380078260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:28:48,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:28:48,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:28:48,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348529982] [2021-06-05 05:28:48,331 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:28:48,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:28:48,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:28:48,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:28:48,331 INFO L87 Difference]: Start difference. First operand 245403 states and 1179196 transitions. Second operand has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:28:52,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:28:52,658 INFO L93 Difference]: Finished difference Result 401083 states and 1918180 transitions. [2021-06-05 05:28:52,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:28:52,659 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-06-05 05:28:52,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:28:55,322 INFO L225 Difference]: With dead ends: 401083 [2021-06-05 05:28:55,322 INFO L226 Difference]: Without dead ends: 400185 [2021-06-05 05:28:55,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 391.5ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:28:55,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400185 states. [2021-06-05 05:29:01,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400185 to 102134. [2021-06-05 05:29:01,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102134 states, 102133 states have (on average 4.781363516199465) internal successors, (488335), 102133 states have internal predecessors, (488335), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:01,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102134 states to 102134 states and 488335 transitions. [2021-06-05 05:29:01,695 INFO L78 Accepts]: Start accepts. Automaton has 102134 states and 488335 transitions. Word has length 43 [2021-06-05 05:29:01,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:01,695 INFO L482 AbstractCegarLoop]: Abstraction has 102134 states and 488335 transitions. [2021-06-05 05:29:01,695 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8666666666666667) internal successors, (58), 15 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:01,695 INFO L276 IsEmpty]: Start isEmpty. Operand 102134 states and 488335 transitions. [2021-06-05 05:29:02,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:29:02,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:02,838 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2021-06-05 05:29:03,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:03,041 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:03,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:03,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1183096580, now seen corresponding path program 39 times [2021-06-05 05:29:03,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:03,041 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936851955] [2021-06-05 05:29:03,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:03,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:03,110 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:29:03,110 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:03,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936851955] [2021-06-05 05:29:03,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936851955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:03,110 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668602627] [2021-06-05 05:29:03,110 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:03,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:29:03,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:29:03,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:29:03,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:29:03,309 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:29:03,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668602627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:03,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:29:03,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-06-05 05:29:03,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856870061] [2021-06-05 05:29:03,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 05:29:03,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:03,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 05:29:03,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 05:29:03,311 INFO L87 Difference]: Start difference. First operand 102134 states and 488335 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 05:29:08,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:08,094 INFO L93 Difference]: Finished difference Result 359669 states and 1677307 transitions. [2021-06-05 05:29:08,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-06-05 05:29:08,095 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 43 [2021-06-05 05:29:08,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:29:10,465 INFO L225 Difference]: With dead ends: 359669 [2021-06-05 05:29:10,466 INFO L226 Difference]: Without dead ends: 358139 [2021-06-05 05:29:10,467 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1809 ImplicationChecksByTransitivity, 977.3ms TimeCoverageRelationStatistics Valid=1034, Invalid=4222, Unknown=0, NotChecked=0, Total=5256 [2021-06-05 05:29:10,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 358139 states. [2021-06-05 05:29:17,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 358139 to 139202. [2021-06-05 05:29:17,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139202 states, 139201 states have (on average 4.859584342066508) internal successors, (676459), 139201 states have internal predecessors, (676459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139202 states to 139202 states and 676459 transitions. [2021-06-05 05:29:18,759 INFO L78 Accepts]: Start accepts. Automaton has 139202 states and 676459 transitions. Word has length 43 [2021-06-05 05:29:18,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:18,759 INFO L482 AbstractCegarLoop]: Abstraction has 139202 states and 676459 transitions. [2021-06-05 05:29:18,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 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 05:29:18,759 INFO L276 IsEmpty]: Start isEmpty. Operand 139202 states and 676459 transitions. [2021-06-05 05:29:19,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-06-05 05:29:19,138 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:19,138 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2021-06-05 05:29:19,338 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 05:29:19,338 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:19,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:19,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1105009528, now seen corresponding path program 40 times [2021-06-05 05:29:19,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:19,341 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851049060] [2021-06-05 05:29:19,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:19,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:19,389 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 10 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-06-05 05:29:19,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:19,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851049060] [2021-06-05 05:29:19,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851049060] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:19,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416799705] [2021-06-05 05:29:19,390 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:19,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:29:19,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:29:19,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:29:19,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:29:19,585 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-06-05 05:29:19,585 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416799705] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:19,585 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:29:19,585 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 05:29:19,585 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591078161] [2021-06-05 05:29:19,586 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:29:19,586 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:19,586 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:29:19,586 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:29:19,586 INFO L87 Difference]: Start difference. First operand 139202 states and 676459 transitions. Second operand has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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 05:29:23,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:23,423 INFO L93 Difference]: Finished difference Result 318028 states and 1526515 transitions. [2021-06-05 05:29:23,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 05:29:23,424 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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 43 [2021-06-05 05:29:23,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:29:25,683 INFO L225 Difference]: With dead ends: 318028 [2021-06-05 05:29:25,683 INFO L226 Difference]: Without dead ends: 317616 [2021-06-05 05:29:25,684 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 441.8ms TimeCoverageRelationStatistics Valid=359, Invalid=901, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 05:29:26,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317616 states. [2021-06-05 05:29:31,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317616 to 168176. [2021-06-05 05:29:31,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168176 states, 168175 states have (on average 4.916592834844656) internal successors, (826848), 168175 states have internal predecessors, (826848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:33,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168176 states to 168176 states and 826848 transitions. [2021-06-05 05:29:33,001 INFO L78 Accepts]: Start accepts. Automaton has 168176 states and 826848 transitions. Word has length 43 [2021-06-05 05:29:33,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:33,001 INFO L482 AbstractCegarLoop]: Abstraction has 168176 states and 826848 transitions. [2021-06-05 05:29:33,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.266666666666667) internal successors, (64), 14 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 05:29:33,001 INFO L276 IsEmpty]: Start isEmpty. Operand 168176 states and 826848 transitions. [2021-06-05 05:29:33,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:29:33,495 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:33,496 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 05:29:33,696 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:33,696 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:33,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:33,697 INFO L82 PathProgramCache]: Analyzing trace with hash 1379806714, now seen corresponding path program 41 times [2021-06-05 05:29:33,697 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:33,697 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851960171] [2021-06-05 05:29:33,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:33,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:33,768 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:29:33,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:33,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851960171] [2021-06-05 05:29:33,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851960171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:33,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052785968] [2021-06-05 05:29:33,769 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:33,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:29:33,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:29:33,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:29:33,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:29:33,932 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 11 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-06-05 05:29:33,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052785968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:33,932 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:29:33,932 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-06-05 05:29:33,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107690361] [2021-06-05 05:29:33,932 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:29:33,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:33,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:29:33,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:29:33,933 INFO L87 Difference]: Start difference. First operand 168176 states and 826848 transitions. Second operand has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:41,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:29:41,591 INFO L93 Difference]: Finished difference Result 593260 states and 2867141 transitions. [2021-06-05 05:29:41,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 05:29:41,592 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:29:41,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:29:45,582 INFO L225 Difference]: With dead ends: 593260 [2021-06-05 05:29:45,582 INFO L226 Difference]: Without dead ends: 584415 [2021-06-05 05:29:45,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 501 ImplicationChecksByTransitivity, 512.0ms TimeCoverageRelationStatistics Valid=593, Invalid=1663, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 05:29:46,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584415 states. [2021-06-05 05:29:55,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584415 to 206454. [2021-06-05 05:29:55,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206454 states, 206453 states have (on average 4.905571728189951) internal successors, (1012770), 206453 states have internal predecessors, (1012770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:57,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206454 states to 206454 states and 1012770 transitions. [2021-06-05 05:29:57,951 INFO L78 Accepts]: Start accepts. Automaton has 206454 states and 1012770 transitions. Word has length 45 [2021-06-05 05:29:57,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:29:57,951 INFO L482 AbstractCegarLoop]: Abstraction has 206454 states and 1012770 transitions. [2021-06-05 05:29:57,951 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 4.375) internal successors, (70), 16 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:29:57,951 INFO L276 IsEmpty]: Start isEmpty. Operand 206454 states and 1012770 transitions. [2021-06-05 05:29:58,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:29:58,593 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:29:58,593 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 05:29:58,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:29:58,794 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:29:58,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:29:58,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1913141946, now seen corresponding path program 42 times [2021-06-05 05:29:58,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:29:58,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381814973] [2021-06-05 05:29:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:29:58,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:29:58,825 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:29:58,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:29:58,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381814973] [2021-06-05 05:29:58,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381814973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:58,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [388583096] [2021-06-05 05:29:58,826 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 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 05:29:58,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 05:29:58,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:29:58,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:29:58,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:29:59,002 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 11 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:29:59,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [388583096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:29:59,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:29:59,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9] total 13 [2021-06-05 05:29:59,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282719749] [2021-06-05 05:29:59,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:29:59,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:29:59,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:29:59,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:29:59,003 INFO L87 Difference]: Start difference. First operand 206454 states and 1012770 transitions. Second operand has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:00,503 WARN L205 SmtUtils]: Spent 539.00 ms on a formula simplification. DAG size of input: 12 DAG size of output: 10 [2021-06-05 05:30:06,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:06,087 INFO L93 Difference]: Finished difference Result 489163 states and 2277599 transitions. [2021-06-05 05:30:06,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-06-05 05:30:06,088 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have 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 05:30:06,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:10,771 INFO L225 Difference]: With dead ends: 489163 [2021-06-05 05:30:10,772 INFO L226 Difference]: Without dead ends: 486417 [2021-06-05 05:30:10,773 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4571 ImplicationChecksByTransitivity, 2056.2ms TimeCoverageRelationStatistics Valid=2313, Invalid=8607, Unknown=0, NotChecked=0, Total=10920 [2021-06-05 05:30:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486417 states. [2021-06-05 05:30:21,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486417 to 219978. [2021-06-05 05:30:22,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219978 states, 219977 states have (on average 4.848534164935425) internal successors, (1066566), 219977 states have internal predecessors, (1066566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:24,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219978 states to 219978 states and 1066566 transitions. [2021-06-05 05:30:24,407 INFO L78 Accepts]: Start accepts. Automaton has 219978 states and 1066566 transitions. Word has length 45 [2021-06-05 05:30:24,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:24,407 INFO L482 AbstractCegarLoop]: Abstraction has 219978 states and 1066566 transitions. [2021-06-05 05:30:24,407 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.857142857142857) internal successors, (68), 13 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:24,407 INFO L276 IsEmpty]: Start isEmpty. Operand 219978 states and 1066566 transitions. [2021-06-05 05:30:25,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:30:25,107 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:25,107 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 05:30:25,307 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-06-05 05:30:25,308 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:25,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:25,308 INFO L82 PathProgramCache]: Analyzing trace with hash 1307644630, now seen corresponding path program 43 times [2021-06-05 05:30:25,308 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:25,308 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067964524] [2021-06-05 05:30:25,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:25,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:25,359 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:30:25,360 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:25,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067964524] [2021-06-05 05:30:25,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067964524] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:25,360 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2081377396] [2021-06-05 05:30:25,360 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:25,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:30:25,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:25,578 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 12 proven. 8 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-06-05 05:30:25,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2081377396] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:25,578 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:25,578 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 10] total 15 [2021-06-05 05:30:25,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938806898] [2021-06-05 05:30:25,578 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:30:25,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:25,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:30:25,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:30:25,579 INFO L87 Difference]: Start difference. First operand 219978 states and 1066566 transitions. Second operand has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 05:30:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:29,477 INFO L93 Difference]: Finished difference Result 345677 states and 1612298 transitions. [2021-06-05 05:30:29,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:30:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 45 [2021-06-05 05:30:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:31,864 INFO L225 Difference]: With dead ends: 345677 [2021-06-05 05:30:31,864 INFO L226 Difference]: Without dead ends: 344598 [2021-06-05 05:30:31,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 372.6ms TimeCoverageRelationStatistics Valid=264, Invalid=792, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 05:30:32,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344598 states. [2021-06-05 05:30:38,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344598 to 187807. [2021-06-05 05:30:39,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187807 states, 187806 states have (on average 4.840143552389168) internal successors, (909008), 187806 states have internal predecessors, (909008), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:40,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187807 states to 187807 states and 909008 transitions. [2021-06-05 05:30:40,945 INFO L78 Accepts]: Start accepts. Automaton has 187807 states and 909008 transitions. Word has length 45 [2021-06-05 05:30:40,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:40,945 INFO L482 AbstractCegarLoop]: Abstraction has 187807 states and 909008 transitions. [2021-06-05 05:30:40,945 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.4) internal successors, (66), 15 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 05:30:40,945 INFO L276 IsEmpty]: Start isEmpty. Operand 187807 states and 909008 transitions. [2021-06-05 05:30:41,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:30:41,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:30:41,532 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 05:30:41,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:41,737 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:30:41,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:30:41,737 INFO L82 PathProgramCache]: Analyzing trace with hash 2065809986, now seen corresponding path program 44 times [2021-06-05 05:30:41,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:30:41,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674981510] [2021-06-05 05:30:41,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:30:41,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:30:41,789 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:30:41,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:30:41,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674981510] [2021-06-05 05:30:41,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674981510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:41,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957958437] [2021-06-05 05:30:41,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:30:41,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 05:30:41,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:30:41,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:30:41,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:30:41,960 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:30:41,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957958437] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:30:41,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:30:41,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 13 [2021-06-05 05:30:41,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191132455] [2021-06-05 05:30:41,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-06-05 05:30:41,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:30:41,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-06-05 05:30:41,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-06-05 05:30:41,961 INFO L87 Difference]: Start difference. First operand 187807 states and 909008 transitions. Second operand has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 05:30:46,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:30:46,302 INFO L93 Difference]: Finished difference Result 362878 states and 1697181 transitions. [2021-06-05 05:30:46,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 05:30:46,302 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 45 [2021-06-05 05:30:46,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:30:48,838 INFO L225 Difference]: With dead ends: 362878 [2021-06-05 05:30:48,839 INFO L226 Difference]: Without dead ends: 361792 [2021-06-05 05:30:48,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 480.7ms TimeCoverageRelationStatistics Valid=556, Invalid=1796, Unknown=0, NotChecked=0, Total=2352 [2021-06-05 05:30:49,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361792 states. [2021-06-05 05:30:57,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361792 to 265120. [2021-06-05 05:30:57,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265120 states, 265119 states have (on average 4.861846944202415) internal successors, (1288968), 265119 states have internal predecessors, (1288968), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:30:59,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265120 states to 265120 states and 1288968 transitions. [2021-06-05 05:30:59,636 INFO L78 Accepts]: Start accepts. Automaton has 265120 states and 1288968 transitions. Word has length 45 [2021-06-05 05:30:59,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:30:59,637 INFO L482 AbstractCegarLoop]: Abstraction has 265120 states and 1288968 transitions. [2021-06-05 05:30:59,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.714285714285714) internal successors, (66), 13 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 05:30:59,637 INFO L276 IsEmpty]: Start isEmpty. Operand 265120 states and 1288968 transitions. [2021-06-05 05:31:01,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:31:01,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:01,088 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 05:31:01,304 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-06-05 05:31:01,305 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:01,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:01,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2086232522, now seen corresponding path program 45 times [2021-06-05 05:31:01,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:01,305 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563049687] [2021-06-05 05:31:01,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:01,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:01,367 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 8 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:31:01,367 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:01,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563049687] [2021-06-05 05:31:01,367 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563049687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:01,367 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210487550] [2021-06-05 05:31:01,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:01,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 05:31:01,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:01,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:31:01,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:01,558 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 2 proven. 21 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:31:01,558 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1210487550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:01,558 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:01,558 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-06-05 05:31:01,558 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027172241] [2021-06-05 05:31:01,558 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 05:31:01,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:01,559 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 05:31:01,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-06-05 05:31:01,559 INFO L87 Difference]: Start difference. First operand 265120 states and 1288968 transitions. Second operand has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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 05:31:10,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:10,410 INFO L93 Difference]: Finished difference Result 557436 states and 2590905 transitions. [2021-06-05 05:31:10,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-06-05 05:31:10,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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 45 [2021-06-05 05:31:10,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:13,820 INFO L225 Difference]: With dead ends: 557436 [2021-06-05 05:31:13,820 INFO L226 Difference]: Without dead ends: 555086 [2021-06-05 05:31:13,821 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4062 ImplicationChecksByTransitivity, 1733.6ms TimeCoverageRelationStatistics Valid=2286, Invalid=8426, Unknown=0, NotChecked=0, Total=10712 [2021-06-05 05:31:15,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555086 states. [2021-06-05 05:31:29,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555086 to 417023. [2021-06-05 05:31:29,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 417023 states, 417022 states have (on average 4.902988331550853) internal successors, (2044654), 417022 states have internal predecessors, (2044654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:34,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 417023 states to 417023 states and 2044654 transitions. [2021-06-05 05:31:34,036 INFO L78 Accepts]: Start accepts. Automaton has 417023 states and 2044654 transitions. Word has length 45 [2021-06-05 05:31:34,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:31:34,036 INFO L482 AbstractCegarLoop]: Abstraction has 417023 states and 2044654 transitions. [2021-06-05 05:31:34,036 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 4.529411764705882) internal successors, (77), 17 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 05:31:34,036 INFO L276 IsEmpty]: Start isEmpty. Operand 417023 states and 2044654 transitions. [2021-06-05 05:31:36,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:31:36,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:31:36,150 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 05:31:36,350 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:36,350 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:31:36,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:31:36,350 INFO L82 PathProgramCache]: Analyzing trace with hash -113271554, now seen corresponding path program 46 times [2021-06-05 05:31:36,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:31:36,351 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203573510] [2021-06-05 05:31:36,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:31:36,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:31:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 14 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2021-06-05 05:31:36,399 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:31:36,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203573510] [2021-06-05 05:31:36,399 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203573510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:36,399 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256471254] [2021-06-05 05:31:36,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:31:36,449 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 05:31:36,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:31:36,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 9 conjunts are in the unsatisfiable core [2021-06-05 05:31:36,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:31:36,603 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 13 proven. 6 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-06-05 05:31:36,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256471254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:31:36,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:31:36,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-06-05 05:31:36,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559017600] [2021-06-05 05:31:36,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-06-05 05:31:36,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:31:36,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-06-05 05:31:36,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2021-06-05 05:31:36,605 INFO L87 Difference]: Start difference. First operand 417023 states and 2044654 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:31:47,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:31:47,903 INFO L93 Difference]: Finished difference Result 928977 states and 4483718 transitions. [2021-06-05 05:31:47,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 05:31:47,903 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have 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 05:31:47,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:31:55,305 INFO L225 Difference]: With dead ends: 928977 [2021-06-05 05:31:55,305 INFO L226 Difference]: Without dead ends: 928257 [2021-06-05 05:31:55,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 398.0ms TimeCoverageRelationStatistics Valid=354, Invalid=978, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 05:31:56,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928257 states. [2021-06-05 05:32:26,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928257 to 605432. [2021-06-05 05:32:27,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605432 states, 605431 states have (on average 4.958003471906791) internal successors, (3001729), 605431 states have internal predecessors, (3001729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:32,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605432 states to 605432 states and 3001729 transitions. [2021-06-05 05:32:32,848 INFO L78 Accepts]: Start accepts. Automaton has 605432 states and 3001729 transitions. Word has length 45 [2021-06-05 05:32:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 05:32:32,848 INFO L482 AbstractCegarLoop]: Abstraction has 605432 states and 3001729 transitions. [2021-06-05 05:32:32,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 14 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:32,848 INFO L276 IsEmpty]: Start isEmpty. Operand 605432 states and 3001729 transitions. [2021-06-05 05:32:37,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-06-05 05:32:37,428 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 05:32:37,428 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 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] [2021-06-05 05:32:37,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 05:32:37,655 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 05:32:37,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 05:32:37,655 INFO L82 PathProgramCache]: Analyzing trace with hash 1285587010, now seen corresponding path program 47 times [2021-06-05 05:32:37,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 05:32:37,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986142259] [2021-06-05 05:32:37,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 05:32:37,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 05:32:37,754 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 11 proven. 12 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-06-05 05:32:37,754 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 05:32:37,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986142259] [2021-06-05 05:32:37,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986142259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:37,754 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359437213] [2021-06-05 05:32:37,754 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 05:32:37,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 05:32:37,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 05:32:37,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjunts are in the unsatisfiable core [2021-06-05 05:32:37,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 05:32:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-06-05 05:32:37,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359437213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 05:32:37,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 05:32:37,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 16 [2021-06-05 05:32:37,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658163394] [2021-06-05 05:32:37,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-06-05 05:32:37,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 05:32:37,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-06-05 05:32:37,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-06-05 05:32:37,946 INFO L87 Difference]: Start difference. First operand 605432 states and 3001729 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 05:32:57,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 05:32:57,724 INFO L93 Difference]: Finished difference Result 1140384 states and 5478626 transitions. [2021-06-05 05:32:57,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 05:32:57,724 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 16 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-06-05 05:32:57,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 05:33:06,677 INFO L225 Difference]: With dead ends: 1140384 [2021-06-05 05:33:06,677 INFO L226 Difference]: Without dead ends: 1137922 [2021-06-05 05:33:06,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 788 ImplicationChecksByTransitivity, 1403.1ms TimeCoverageRelationStatistics Valid=660, Invalid=2096, Unknown=0, NotChecked=0, Total=2756 [2021-06-05 05:33:08,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1137922 states. Received shutdown request... [2021-06-05 05:33:33,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-06-05 05:33:33,757 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 05:33:33,758 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 05:33:33,760 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 05:33:33,760 INFO L202 PluginConnector]: Adding new model counter-determinism.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 05:33:33 BasicIcfg [2021-06-05 05:33:33,760 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 05:33:33,761 INFO L168 Benchmark]: Toolchain (without parser) took 565829.78 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 352.8 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 9.1 GB. Max. memory is 16.0 GB. [2021-06-05 05:33:33,761 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 373.3 MB. Free memory is still 353.9 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:33:33,761 INFO L168 Benchmark]: Boogie Procedure Inliner took 20.60 ms. Allocated memory is still 373.3 MB. Free memory was 352.8 MB in the beginning and 351.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 05:33:33,761 INFO L168 Benchmark]: Boogie Preprocessor took 14.73 ms. Allocated memory is still 373.3 MB. Free memory was 351.2 MB in the beginning and 350.3 MB in the end (delta: 907.3 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. [2021-06-05 05:33:33,761 INFO L168 Benchmark]: RCFGBuilder took 225.84 ms. Allocated memory is still 373.3 MB. Free memory was 350.2 MB in the beginning and 335.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-06-05 05:33:33,761 INFO L168 Benchmark]: TraceAbstraction took 565564.38 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 335.3 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 9.1 GB. Max. memory is 16.0 GB. [2021-06-05 05:33:33,762 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 0.16 ms. Allocated memory is still 373.3 MB. Free memory is still 353.9 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 20.60 ms. Allocated memory is still 373.3 MB. Free memory was 352.8 MB in the beginning and 351.2 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.73 ms. Allocated memory is still 373.3 MB. Free memory was 351.2 MB in the beginning and 350.3 MB in the end (delta: 907.3 kB). Peak memory consumption was 4.2 MB. Max. memory is 16.0 GB. * RCFGBuilder took 225.84 ms. Allocated memory is still 373.3 MB. Free memory was 350.2 MB in the beginning and 335.8 MB in the end (delta: 14.4 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 565564.38 ms. Allocated memory was 373.3 MB in the beginning and 16.0 GB in the end (delta: 15.6 GB). Free memory was 335.3 MB in the beginning and 9.6 GB in the end (delta: -9.3 GB). Peak memory consumption was 9.1 GB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 75]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 74]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while executing MinimizeSevpa. - TimeoutResultAtElement [Line: 83]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while executing MinimizeSevpa. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 56 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 565470.5ms, OverallIterations: 58, TraceHistogramMax: 3, EmptinessCheckTime: 26827.6ms, AutomataDifference: 211952.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 90.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 4453 SDtfs, 19134 SDslu, 30078 SDs, 0 SdLazy, 14674 SolverSat, 2260 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7041.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 3123 GetRequests, 1763 SyntacticMatches, 5 SemanticMatches, 1355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17662 ImplicationChecksByTransitivity, 16341.3ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=605432occurred in iteration=57, InterpolantAutomatonStates: 1097, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 301897.5ms AutomataMinimizationTime, 58 MinimizatonAttempts, 3678757 StatesRemovedByMinimization, 57 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 304.9ms SsaConstructionTime, 833.0ms SatisfiabilityAnalysisTime, 11720.0ms InterpolantComputationTime, 4119 NumberOfCodeBlocks, 4105 NumberOfCodeBlocksAsserted, 177 NumberOfCheckSat, 4012 ConstructedInterpolants, 0 QuantifiedInterpolants, 23259 SizeOfPredicates, 141 NumberOfNonLiveVariables, 5130 ConjunctsInSsa, 610 ConjunctsInUnsatCore, 107 InterpolantComputations, 10 PerfectInterpolantSequences, 625/1450 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