/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/array-eq-trans.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 21:09:26,678 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 21:09:26,680 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 21:09:26,701 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 21:09:26,751 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 21:09:26,774 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 21:09:26,774 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 21:09:26,775 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 21:09:26,775 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 21:09:26,777 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 21:09:26,777 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 21:09:26,777 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 21:09:26,777 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 21:09:26,778 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 21:09:26,778 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 21:09:26,778 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 21:09:26,778 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 21:09:26,778 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 21:09:26,779 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 21:09:26,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:09:26,780 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 21:09:26,780 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 21:09:26,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 21:09:26,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 21:09:26,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 21:09:26,780 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 21:09:26,780 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 21:09:26,780 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 21:09:27,027 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 21:09:27,046 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 21:09:27,048 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 21:09:27,049 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 21:09:27,050 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 21:09:27,050 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl [2021-03-10 21:09:27,051 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2021-03-10 21:09:27,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 21:09:27,083 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 21:09:27,084 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 21:09:27,084 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 21:09:27,084 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 21:09:27,092 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,098 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,103 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 21:09:27,104 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 21:09:27,104 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 21:09:27,104 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 21:09:27,109 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,109 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,110 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,110 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,112 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,114 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,115 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... [2021-03-10 21:09:27,116 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 21:09:27,116 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 21:09:27,116 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 21:09:27,116 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 21:09:27,117 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 21:09:27,165 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 21:09:27,165 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 21:09:27,165 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 21:09:27,165 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 21:09:27,165 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 21:09:27,165 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 21:09:27,165 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 21:09:27,165 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 21:09:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 21:09:27,166 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-03-10 21:09:27,166 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-03-10 21:09:27,166 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-03-10 21:09:27,166 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 21:09:27,291 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 21:09:27,291 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 21:09:27,292 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:09:27 BoogieIcfgContainer [2021-03-10 21:09:27,292 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 21:09:27,293 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 21:09:27,293 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 21:09:27,297 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 21:09:27,297 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 09:09:27" (1/2) ... [2021-03-10 21:09:27,298 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@23da206f and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 09:09:27, skipping insertion in model container [2021-03-10 21:09:27,298 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 09:09:27" (2/2) ... [2021-03-10 21:09:27,299 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2021-03-10 21:09:27,302 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 21:09:27,302 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 21:09:27,304 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 21:09:27,305 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 21:09:27,367 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-03-10 21:09:27,378 INFO L253 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-03-10 21:09:27,393 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 21:09:27,393 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 21:09:27,394 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 21:09:27,394 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 21:09:27,394 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 21:09:27,394 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 21:09:27,394 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 21:09:27,394 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 21:09:27,404 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2021-03-10 21:09:27,433 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,436 INFO L276 IsEmpty]: Start isEmpty. Operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-03-10 21:09:27,446 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:27,449 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:27,450 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1022226388, now seen corresponding path program 1 times [2021-03-10 21:09:27,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:27,461 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334924844] [2021-03-10 21:09:27,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:27,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:27,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:27,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334924844] [2021-03-10 21:09:27,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:09:27,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:09:27,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103890516] [2021-03-10 21:09:27,637 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:27,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:27,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:27,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:27,647 INFO L87 Difference]: Start difference. First operand has 307 states, 305 states have (on average 3.3737704918032785) internal successors, (1029), 306 states have internal predecessors, (1029), 0 states have call successors, (0), 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 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:27,772 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2021-03-10 21:09:27,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-03-10 21:09:27,773 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-03-10 21:09:27,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:27,786 INFO L225 Difference]: With dead ends: 606 [2021-03-10 21:09:27,786 INFO L226 Difference]: Without dead ends: 591 [2021-03-10 21:09:27,787 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:27,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-03-10 21:09:27,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2021-03-10 21:09:27,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 405 states have (on average 3.3580246913580245) internal successors, (1360), 405 states have internal predecessors, (1360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2021-03-10 21:09:27,841 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2021-03-10 21:09:27,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:27,841 INFO L480 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2021-03-10 21:09:27,841 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:27,842 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2021-03-10 21:09:27,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:09:27,844 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:27,844 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:27,845 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 21:09:27,845 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:27,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:27,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1372690376, now seen corresponding path program 1 times [2021-03-10 21:09:27,845 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:27,846 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028291706] [2021-03-10 21:09:27,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:27,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:27,889 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:27,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028291706] [2021-03-10 21:09:27,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30138103] [2021-03-10 21:09:27,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:27,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:27,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-03-10 21:09:27,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:28,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:28,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:28,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-03-10 21:09:28,104 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919374730] [2021-03-10 21:09:28,104 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:28,104 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:28,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:28,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:28,105 INFO L87 Difference]: Start difference. First operand 406 states and 1360 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:28,199 INFO L93 Difference]: Finished difference Result 1011 states and 3270 transitions. [2021-03-10 21:09:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 21:09:28,199 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:09:28,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:28,205 INFO L225 Difference]: With dead ends: 1011 [2021-03-10 21:09:28,206 INFO L226 Difference]: Without dead ends: 847 [2021-03-10 21:09:28,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 37.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:28,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-03-10 21:09:28,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 440. [2021-03-10 21:09:28,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 3.359908883826879) internal successors, (1475), 439 states have internal predecessors, (1475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2021-03-10 21:09:28,239 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2021-03-10 21:09:28,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:28,239 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2021-03-10 21:09:28,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:28,239 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2021-03-10 21:09:28,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:09:28,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:28,242 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:28,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 21:09:28,456 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:28,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:28,457 INFO L82 PathProgramCache]: Analyzing trace with hash -910224837, now seen corresponding path program 1 times [2021-03-10 21:09:28,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:28,457 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918157374] [2021-03-10 21:09:28,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:28,670 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:28,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918157374] [2021-03-10 21:09:28,671 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975514434] [2021-03-10 21:09:28,671 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) [2021-03-10 21:09:28,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:28,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:28,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:28,780 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:28,781 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:28,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-03-10 21:09:28,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022805245] [2021-03-10 21:09:28,781 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:28,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:28,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:28,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:28,782 INFO L87 Difference]: Start difference. First operand 440 states and 1475 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:29,113 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2021-03-10 21:09:29,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:09:29,113 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:09:29,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:29,120 INFO L225 Difference]: With dead ends: 1656 [2021-03-10 21:09:29,120 INFO L226 Difference]: Without dead ends: 1415 [2021-03-10 21:09:29,121 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:09:29,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-03-10 21:09:29,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2021-03-10 21:09:29,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 637 states, 636 states have (on average 3.49685534591195) internal successors, (2224), 636 states have internal predecessors, (2224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2021-03-10 21:09:29,138 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2021-03-10 21:09:29,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:29,138 INFO L480 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2021-03-10 21:09:29,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,138 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2021-03-10 21:09:29,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:09:29,140 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:29,140 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:29,355 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:29,355 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:29,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:29,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1302877552, now seen corresponding path program 1 times [2021-03-10 21:09:29,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:29,356 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314639014] [2021-03-10 21:09:29,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:29,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:29,400 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:29,400 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314639014] [2021-03-10 21:09:29,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:09:29,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:09:29,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028286069] [2021-03-10 21:09:29,400 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:29,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:29,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:29,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:29,401 INFO L87 Difference]: Start difference. First operand 637 states and 2224 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:29,464 INFO L93 Difference]: Finished difference Result 1343 states and 4620 transitions. [2021-03-10 21:09:29,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:09:29,464 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:09:29,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:29,471 INFO L225 Difference]: With dead ends: 1343 [2021-03-10 21:09:29,471 INFO L226 Difference]: Without dead ends: 1119 [2021-03-10 21:09:29,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:29,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-03-10 21:09:29,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 792. [2021-03-10 21:09:29,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 791 states have (on average 3.4829329962073325) internal successors, (2755), 791 states have internal predecessors, (2755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2755 transitions. [2021-03-10 21:09:29,492 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2755 transitions. Word has length 18 [2021-03-10 21:09:29,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:29,492 INFO L480 AbstractCegarLoop]: Abstraction has 792 states and 2755 transitions. [2021-03-10 21:09:29,492 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,492 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2755 transitions. [2021-03-10 21:09:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:09:29,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:29,494 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:29,494 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 21:09:29,494 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:29,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:29,495 INFO L82 PathProgramCache]: Analyzing trace with hash 1936831982, now seen corresponding path program 2 times [2021-03-10 21:09:29,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:29,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511742495] [2021-03-10 21:09:29,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:29,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:29,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:29,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511742495] [2021-03-10 21:09:29,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:09:29,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:09:29,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192482845] [2021-03-10 21:09:29,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:29,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:29,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:29,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:29,534 INFO L87 Difference]: Start difference. First operand 792 states and 2755 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:29,592 INFO L93 Difference]: Finished difference Result 1367 states and 4635 transitions. [2021-03-10 21:09:29,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:09:29,592 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 21:09:29,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:29,598 INFO L225 Difference]: With dead ends: 1367 [2021-03-10 21:09:29,598 INFO L226 Difference]: Without dead ends: 1199 [2021-03-10 21:09:29,598 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 30.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:29,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-03-10 21:09:29,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 810. [2021-03-10 21:09:29,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 810 states, 809 states have (on average 3.4561186650185416) internal successors, (2796), 809 states have internal predecessors, (2796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2796 transitions. [2021-03-10 21:09:29,622 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2796 transitions. Word has length 18 [2021-03-10 21:09:29,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:29,623 INFO L480 AbstractCegarLoop]: Abstraction has 810 states and 2796 transitions. [2021-03-10 21:09:29,623 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 4 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,623 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2796 transitions. [2021-03-10 21:09:29,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 21:09:29,625 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:29,625 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:29,625 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 21:09:29,625 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:29,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:29,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1545690414, now seen corresponding path program 2 times [2021-03-10 21:09:29,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:29,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959261368] [2021-03-10 21:09:29,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:29,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:29,650 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959261368] [2021-03-10 21:09:29,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101361253] [2021-03-10 21:09:29,650 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 [2021-03-10 21:09:29,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:29,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:29,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:09:29,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:29,755 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:29,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:29,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-03-10 21:09:29,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286675522] [2021-03-10 21:09:29,756 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:29,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:29,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:29,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:29,756 INFO L87 Difference]: Start difference. First operand 810 states and 2796 transitions. Second operand has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-03-10 21:09:29,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:29,889 INFO L93 Difference]: Finished difference Result 1393 states and 4689 transitions. [2021-03-10 21:09:29,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:29,889 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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 18 [2021-03-10 21:09:29,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:29,897 INFO L225 Difference]: With dead ends: 1393 [2021-03-10 21:09:29,897 INFO L226 Difference]: Without dead ends: 1115 [2021-03-10 21:09:29,898 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 78.1ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:29,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1115 states. [2021-03-10 21:09:29,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1115 to 707. [2021-03-10 21:09:29,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 707 states, 706 states have (on average 3.4674220963172804) internal successors, (2448), 706 states have internal predecessors, (2448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:29,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2448 transitions. [2021-03-10 21:09:29,927 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2448 transitions. Word has length 18 [2021-03-10 21:09:29,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:29,927 INFO L480 AbstractCegarLoop]: Abstraction has 707 states and 2448 transitions. [2021-03-10 21:09:29,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.625) internal successors, (29), 7 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) [2021-03-10 21:09:29,928 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2448 transitions. [2021-03-10 21:09:29,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:09:29,930 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:29,930 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:30,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:30,143 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:30,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:30,144 INFO L82 PathProgramCache]: Analyzing trace with hash -517394769, now seen corresponding path program 1 times [2021-03-10 21:09:30,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:30,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064120009] [2021-03-10 21:09:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:30,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:30,179 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:30,179 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064120009] [2021-03-10 21:09:30,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991966859] [2021-03-10 21:09:30,180 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 [2021-03-10 21:09:30,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:30,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:09:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:30,287 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:30,287 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:30,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-03-10 21:09:30,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337958030] [2021-03-10 21:09:30,288 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 21:09:30,288 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:30,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 21:09:30,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 21:09:30,289 INFO L87 Difference]: Start difference. First operand 707 states and 2448 transitions. Second operand has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:30,435 INFO L93 Difference]: Finished difference Result 1633 states and 5488 transitions. [2021-03-10 21:09:30,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:30,435 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:09:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:30,443 INFO L225 Difference]: With dead ends: 1633 [2021-03-10 21:09:30,443 INFO L226 Difference]: Without dead ends: 1633 [2021-03-10 21:09:30,443 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 81.0ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:30,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1633 states. [2021-03-10 21:09:30,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1633 to 857. [2021-03-10 21:09:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 857 states, 856 states have (on average 3.5116822429906542) internal successors, (3006), 856 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 857 states to 857 states and 3006 transitions. [2021-03-10 21:09:30,469 INFO L78 Accepts]: Start accepts. Automaton has 857 states and 3006 transitions. Word has length 21 [2021-03-10 21:09:30,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:30,469 INFO L480 AbstractCegarLoop]: Abstraction has 857 states and 3006 transitions. [2021-03-10 21:09:30,469 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.0) internal successors, (24), 5 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,469 INFO L276 IsEmpty]: Start isEmpty. Operand 857 states and 3006 transitions. [2021-03-10 21:09:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:09:30,473 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:30,473 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:30,687 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:30,687 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:30,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:30,688 INFO L82 PathProgramCache]: Analyzing trace with hash -166404083, now seen corresponding path program 2 times [2021-03-10 21:09:30,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:30,688 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956607426] [2021-03-10 21:09:30,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:30,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:30,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:30,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956607426] [2021-03-10 21:09:30,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859711840] [2021-03-10 21:09:30,714 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) [2021-03-10 21:09:30,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:30,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:30,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:09:30,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:30,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:30,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:30,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-03-10 21:09:30,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107572287] [2021-03-10 21:09:30,795 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:30,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:30,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:30,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:30,796 INFO L87 Difference]: Start difference. First operand 857 states and 3006 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) [2021-03-10 21:09:30,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:30,929 INFO L93 Difference]: Finished difference Result 1582 states and 5268 transitions. [2021-03-10 21:09:30,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:30,930 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 21 [2021-03-10 21:09:30,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:30,936 INFO L225 Difference]: With dead ends: 1582 [2021-03-10 21:09:30,936 INFO L226 Difference]: Without dead ends: 1560 [2021-03-10 21:09:30,936 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 67.6ms TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:30,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-03-10 21:09:30,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 937. [2021-03-10 21:09:30,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 937 states, 936 states have (on average 3.450854700854701) internal successors, (3230), 936 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:30,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 937 states to 937 states and 3230 transitions. [2021-03-10 21:09:30,958 INFO L78 Accepts]: Start accepts. Automaton has 937 states and 3230 transitions. Word has length 21 [2021-03-10 21:09:30,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:30,959 INFO L480 AbstractCegarLoop]: Abstraction has 937 states and 3230 transitions. [2021-03-10 21:09:30,959 INFO L481 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) [2021-03-10 21:09:30,959 INFO L276 IsEmpty]: Start isEmpty. Operand 937 states and 3230 transitions. [2021-03-10 21:09:30,961 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:09:30,961 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:30,961 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:31,179 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:31,179 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:31,179 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:31,179 INFO L82 PathProgramCache]: Analyzing trace with hash -1851685711, now seen corresponding path program 3 times [2021-03-10 21:09:31,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:31,180 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551189520] [2021-03-10 21:09:31,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:31,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:31,209 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:31,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551189520] [2021-03-10 21:09:31,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [643977094] [2021-03-10 21:09:31,209 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 [2021-03-10 21:09:31,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:09:31,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:31,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-03-10 21:09:31,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:31,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:31,297 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:31,297 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-03-10 21:09:31,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358425006] [2021-03-10 21:09:31,298 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:31,298 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:31,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:31,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:31,298 INFO L87 Difference]: Start difference. First operand 937 states and 3230 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:31,467 INFO L93 Difference]: Finished difference Result 1692 states and 5627 transitions. [2021-03-10 21:09:31,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:31,467 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:09:31,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:31,474 INFO L225 Difference]: With dead ends: 1692 [2021-03-10 21:09:31,474 INFO L226 Difference]: Without dead ends: 1692 [2021-03-10 21:09:31,475 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 72.3ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:31,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1692 states. [2021-03-10 21:09:31,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1692 to 723. [2021-03-10 21:09:31,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 723 states, 722 states have (on average 3.4224376731301938) internal successors, (2471), 722 states have internal predecessors, (2471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 723 states to 723 states and 2471 transitions. [2021-03-10 21:09:31,502 INFO L78 Accepts]: Start accepts. Automaton has 723 states and 2471 transitions. Word has length 21 [2021-03-10 21:09:31,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:31,503 INFO L480 AbstractCegarLoop]: Abstraction has 723 states and 2471 transitions. [2021-03-10 21:09:31,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,503 INFO L276 IsEmpty]: Start isEmpty. Operand 723 states and 2471 transitions. [2021-03-10 21:09:31,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:09:31,504 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:31,504 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:31,723 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:31,723 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash 801774587, now seen corresponding path program 4 times [2021-03-10 21:09:31,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:31,724 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927929109] [2021-03-10 21:09:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:31,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:31,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:31,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927929109] [2021-03-10 21:09:31,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:09:31,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:09:31,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716449369] [2021-03-10 21:09:31,763 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:31,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:31,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:31,763 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:31,764 INFO L87 Difference]: Start difference. First operand 723 states and 2471 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:31,843 INFO L93 Difference]: Finished difference Result 1159 states and 3893 transitions. [2021-03-10 21:09:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:09:31,843 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:09:31,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:31,849 INFO L225 Difference]: With dead ends: 1159 [2021-03-10 21:09:31,849 INFO L226 Difference]: Without dead ends: 1147 [2021-03-10 21:09:31,850 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.8ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:31,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1147 states. [2021-03-10 21:09:31,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1147 to 713. [2021-03-10 21:09:31,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.418539325842697) internal successors, (2434), 712 states have internal predecessors, (2434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2434 transitions. [2021-03-10 21:09:31,866 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2434 transitions. Word has length 21 [2021-03-10 21:09:31,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:31,866 INFO L480 AbstractCegarLoop]: Abstraction has 713 states and 2434 transitions. [2021-03-10 21:09:31,866 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,866 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2434 transitions. [2021-03-10 21:09:31,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:09:31,868 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:31,869 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:31,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-03-10 21:09:31,869 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:31,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:31,869 INFO L82 PathProgramCache]: Analyzing trace with hash -908495731, now seen corresponding path program 5 times [2021-03-10 21:09:31,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:31,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797010280] [2021-03-10 21:09:31,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:31,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:31,893 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797010280] [2021-03-10 21:09:31,893 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:09:31,893 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:09:31,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020924486] [2021-03-10 21:09:31,893 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:31,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:31,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:31,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:31,894 INFO L87 Difference]: Start difference. First operand 713 states and 2434 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:31,952 INFO L93 Difference]: Finished difference Result 1151 states and 3833 transitions. [2021-03-10 21:09:31,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:09:31,953 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:09:31,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:31,957 INFO L225 Difference]: With dead ends: 1151 [2021-03-10 21:09:31,957 INFO L226 Difference]: Without dead ends: 1131 [2021-03-10 21:09:31,958 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 21.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:31,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1131 states. [2021-03-10 21:09:31,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1131 to 803. [2021-03-10 21:09:31,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 3.36284289276808) internal successors, (2697), 802 states have internal predecessors, (2697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 2697 transitions. [2021-03-10 21:09:31,974 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 2697 transitions. Word has length 21 [2021-03-10 21:09:31,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:31,974 INFO L480 AbstractCegarLoop]: Abstraction has 803 states and 2697 transitions. [2021-03-10 21:09:31,974 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:31,975 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 2697 transitions. [2021-03-10 21:09:31,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-03-10 21:09:31,976 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:31,976 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:31,976 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-03-10 21:09:31,976 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:31,977 INFO L82 PathProgramCache]: Analyzing trace with hash -1122312109, now seen corresponding path program 6 times [2021-03-10 21:09:31,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:31,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440242181] [2021-03-10 21:09:31,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:31,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:31,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:31,996 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440242181] [2021-03-10 21:09:31,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 21:09:31,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-03-10 21:09:31,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082362362] [2021-03-10 21:09:31,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-03-10 21:09:31,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:31,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-03-10 21:09:31,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-03-10 21:09:31,997 INFO L87 Difference]: Start difference. First operand 803 states and 2697 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:32,053 INFO L93 Difference]: Finished difference Result 1006 states and 3455 transitions. [2021-03-10 21:09:32,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-03-10 21:09:32,053 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-03-10 21:09:32,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:32,057 INFO L225 Difference]: With dead ends: 1006 [2021-03-10 21:09:32,057 INFO L226 Difference]: Without dead ends: 992 [2021-03-10 21:09:32,058 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 22.2ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:32,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-03-10 21:09:32,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 713. [2021-03-10 21:09:32,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 713 states, 712 states have (on average 3.417134831460674) internal successors, (2433), 712 states have internal predecessors, (2433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 713 states to 713 states and 2433 transitions. [2021-03-10 21:09:32,072 INFO L78 Accepts]: Start accepts. Automaton has 713 states and 2433 transitions. Word has length 21 [2021-03-10 21:09:32,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:32,072 INFO L480 AbstractCegarLoop]: Abstraction has 713 states and 2433 transitions. [2021-03-10 21:09:32,072 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,072 INFO L276 IsEmpty]: Start isEmpty. Operand 713 states and 2433 transitions. [2021-03-10 21:09:32,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:32,074 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:32,074 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:32,074 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-03-10 21:09:32,074 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:32,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:32,074 INFO L82 PathProgramCache]: Analyzing trace with hash 1455380781, now seen corresponding path program 1 times [2021-03-10 21:09:32,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:32,074 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961233747] [2021-03-10 21:09:32,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:32,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:32,150 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:32,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961233747] [2021-03-10 21:09:32,150 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417793522] [2021-03-10 21:09:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:32,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:32,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:09:32,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:32,270 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:32,270 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:32,270 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-03-10 21:09:32,270 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320513748] [2021-03-10 21:09:32,270 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:32,270 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:32,271 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:32,271 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:32,271 INFO L87 Difference]: Start difference. First operand 713 states and 2433 transitions. Second operand has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:32,469 INFO L93 Difference]: Finished difference Result 1573 states and 5207 transitions. [2021-03-10 21:09:32,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:32,471 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:32,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:32,477 INFO L225 Difference]: With dead ends: 1573 [2021-03-10 21:09:32,478 INFO L226 Difference]: Without dead ends: 1284 [2021-03-10 21:09:32,478 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 106.2ms TimeCoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:32,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1284 states. [2021-03-10 21:09:32,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1284 to 953. [2021-03-10 21:09:32,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 953 states, 952 states have (on average 3.4495798319327733) internal successors, (3284), 952 states have internal predecessors, (3284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 953 states to 953 states and 3284 transitions. [2021-03-10 21:09:32,496 INFO L78 Accepts]: Start accepts. Automaton has 953 states and 3284 transitions. Word has length 24 [2021-03-10 21:09:32,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:32,497 INFO L480 AbstractCegarLoop]: Abstraction has 953 states and 3284 transitions. [2021-03-10 21:09:32,497 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.5) internal successors, (45), 9 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:32,497 INFO L276 IsEmpty]: Start isEmpty. Operand 953 states and 3284 transitions. [2021-03-10 21:09:32,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:32,499 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:32,499 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:32,711 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:32,711 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:32,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:32,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1923453683, now seen corresponding path program 1 times [2021-03-10 21:09:32,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:32,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665113706] [2021-03-10 21:09:32,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:32,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:32,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665113706] [2021-03-10 21:09:32,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766133509] [2021-03-10 21:09:32,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:32,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:32,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:32,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:32,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:09:32,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:32,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:32,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:32,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-03-10 21:09:32,872 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:32,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:32,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-03-10 21:09:32,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545020291] [2021-03-10 21:09:32,874 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:32,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:32,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:32,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:32,874 INFO L87 Difference]: Start difference. First operand 953 states and 3284 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:33,043 INFO L93 Difference]: Finished difference Result 2461 states and 8362 transitions. [2021-03-10 21:09:33,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:33,043 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:33,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:33,049 INFO L225 Difference]: With dead ends: 2461 [2021-03-10 21:09:33,049 INFO L226 Difference]: Without dead ends: 2403 [2021-03-10 21:09:33,049 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 94.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:33,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2403 states. [2021-03-10 21:09:33,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2403 to 1586. [2021-03-10 21:09:33,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1586 states, 1585 states have (on average 3.580441640378549) internal successors, (5675), 1585 states have internal predecessors, (5675), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1586 states to 1586 states and 5675 transitions. [2021-03-10 21:09:33,086 INFO L78 Accepts]: Start accepts. Automaton has 1586 states and 5675 transitions. Word has length 24 [2021-03-10 21:09:33,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:33,086 INFO L480 AbstractCegarLoop]: Abstraction has 1586 states and 5675 transitions. [2021-03-10 21:09:33,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,086 INFO L276 IsEmpty]: Start isEmpty. Operand 1586 states and 5675 transitions. [2021-03-10 21:09:33,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:33,089 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:33,090 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:33,303 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-03-10 21:09:33,305 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:33,305 INFO L82 PathProgramCache]: Analyzing trace with hash -1508213623, now seen corresponding path program 2 times [2021-03-10 21:09:33,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:33,306 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295847587] [2021-03-10 21:09:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:33,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:33,350 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:33,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295847587] [2021-03-10 21:09:33,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896225162] [2021-03-10 21:09:33,351 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:33,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:33,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:33,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:33,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:33,431 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:33,432 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:33,435 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:33,435 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:33,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-03-10 21:09:33,453 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:33,453 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:33,453 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:09:33,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523010876] [2021-03-10 21:09:33,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:33,454 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:33,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:33,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:33,454 INFO L87 Difference]: Start difference. First operand 1586 states and 5675 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:33,642 INFO L93 Difference]: Finished difference Result 2726 states and 9219 transitions. [2021-03-10 21:09:33,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:33,642 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:33,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:33,649 INFO L225 Difference]: With dead ends: 2726 [2021-03-10 21:09:33,649 INFO L226 Difference]: Without dead ends: 2726 [2021-03-10 21:09:33,650 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 91.4ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:33,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2726 states. [2021-03-10 21:09:33,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2726 to 2067. [2021-03-10 21:09:33,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 3.547434656340755) internal successors, (7329), 2066 states have internal predecessors, (7329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 7329 transitions. [2021-03-10 21:09:33,695 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 7329 transitions. Word has length 24 [2021-03-10 21:09:33,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:33,696 INFO L480 AbstractCegarLoop]: Abstraction has 2067 states and 7329 transitions. [2021-03-10 21:09:33,696 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:33,696 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 7329 transitions. [2021-03-10 21:09:33,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:33,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:33,700 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:33,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 21:09:33,917 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:33,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:33,918 INFO L82 PathProgramCache]: Analyzing trace with hash 1122100393, now seen corresponding path program 1 times [2021-03-10 21:09:33,918 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:33,918 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365402630] [2021-03-10 21:09:33,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:33,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:33,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365402630] [2021-03-10 21:09:33,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960285530] [2021-03-10 21:09:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order 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 [2021-03-10 21:09:34,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:34,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:34,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:34,163 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:34,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:34,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 21:09:34,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791184027] [2021-03-10 21:09:34,164 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:34,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:34,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:34,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:34,164 INFO L87 Difference]: Start difference. First operand 2067 states and 7329 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:34,398 INFO L93 Difference]: Finished difference Result 2955 states and 10052 transitions. [2021-03-10 21:09:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:34,398 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:34,404 INFO L225 Difference]: With dead ends: 2955 [2021-03-10 21:09:34,404 INFO L226 Difference]: Without dead ends: 2571 [2021-03-10 21:09:34,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 224.7ms TimeCoverageRelationStatistics Valid=103, Invalid=239, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:09:34,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2571 states. [2021-03-10 21:09:34,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2571 to 2131. [2021-03-10 21:09:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2131 states, 2130 states have (on average 3.504694835680751) internal successors, (7465), 2130 states have internal predecessors, (7465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2131 states to 2131 states and 7465 transitions. [2021-03-10 21:09:34,445 INFO L78 Accepts]: Start accepts. Automaton has 2131 states and 7465 transitions. Word has length 24 [2021-03-10 21:09:34,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:34,445 INFO L480 AbstractCegarLoop]: Abstraction has 2131 states and 7465 transitions. [2021-03-10 21:09:34,445 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:34,445 INFO L276 IsEmpty]: Start isEmpty. Operand 2131 states and 7465 transitions. [2021-03-10 21:09:34,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:34,449 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:34,449 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:34,663 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 21:09:34,663 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:34,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:34,664 INFO L82 PathProgramCache]: Analyzing trace with hash 2096711821, now seen corresponding path program 2 times [2021-03-10 21:09:34,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:34,664 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290191209] [2021-03-10 21:09:34,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:34,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:34,723 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:34,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290191209] [2021-03-10 21:09:34,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1840583607] [2021-03-10 21:09:34,724 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 [2021-03-10 21:09:34,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:34,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:34,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:34,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:34,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:34,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:34,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:09:34,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94493076] [2021-03-10 21:09:34,857 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:09:34,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:34,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:09:34,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:34,858 INFO L87 Difference]: Start difference. First operand 2131 states and 7465 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:35,132 INFO L93 Difference]: Finished difference Result 4985 states and 16999 transitions. [2021-03-10 21:09:35,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:09:35,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:35,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:35,171 INFO L225 Difference]: With dead ends: 4985 [2021-03-10 21:09:35,171 INFO L226 Difference]: Without dead ends: 4423 [2021-03-10 21:09:35,171 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 158.6ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:09:35,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4423 states. [2021-03-10 21:09:35,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4423 to 2503. [2021-03-10 21:09:35,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2503 states, 2502 states have (on average 3.5995203836930454) internal successors, (9006), 2502 states have internal predecessors, (9006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2503 states to 2503 states and 9006 transitions. [2021-03-10 21:09:35,234 INFO L78 Accepts]: Start accepts. Automaton has 2503 states and 9006 transitions. Word has length 24 [2021-03-10 21:09:35,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:35,235 INFO L480 AbstractCegarLoop]: Abstraction has 2503 states and 9006 transitions. [2021-03-10 21:09:35,235 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:35,235 INFO L276 IsEmpty]: Start isEmpty. Operand 2503 states and 9006 transitions. [2021-03-10 21:09:35,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:35,241 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:35,241 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:35,455 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 21:09:35,455 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:35,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:35,455 INFO L82 PathProgramCache]: Analyzing trace with hash -337245367, now seen corresponding path program 3 times [2021-03-10 21:09:35,456 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:35,456 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001317602] [2021-03-10 21:09:35,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:35,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:35,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001317602] [2021-03-10 21:09:35,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23682540] [2021-03-10 21:09:35,504 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 [2021-03-10 21:09:35,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:09:35,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:35,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:35,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:35,632 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:35,632 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:35,632 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-03-10 21:09:35,632 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139867582] [2021-03-10 21:09:35,632 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:09:35,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:35,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:09:35,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:35,633 INFO L87 Difference]: Start difference. First operand 2503 states and 9006 transitions. Second operand has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:36,015 INFO L93 Difference]: Finished difference Result 5324 states and 18970 transitions. [2021-03-10 21:09:36,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 21:09:36,016 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:36,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:36,026 INFO L225 Difference]: With dead ends: 5324 [2021-03-10 21:09:36,026 INFO L226 Difference]: Without dead ends: 4481 [2021-03-10 21:09:36,027 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 224.3ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:09:36,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4481 states. [2021-03-10 21:09:36,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4481 to 2803. [2021-03-10 21:09:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2803 states, 2802 states have (on average 3.6245538900785155) internal successors, (10156), 2802 states have internal predecessors, (10156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2803 states to 2803 states and 10156 transitions. [2021-03-10 21:09:36,113 INFO L78 Accepts]: Start accepts. Automaton has 2803 states and 10156 transitions. Word has length 24 [2021-03-10 21:09:36,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:36,113 INFO L480 AbstractCegarLoop]: Abstraction has 2803 states and 10156 transitions. [2021-03-10 21:09:36,114 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.9166666666666665) internal successors, (47), 11 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,114 INFO L276 IsEmpty]: Start isEmpty. Operand 2803 states and 10156 transitions. [2021-03-10 21:09:36,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:36,118 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:36,118 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:36,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-03-10 21:09:36,331 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:36,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1257907469, now seen corresponding path program 1 times [2021-03-10 21:09:36,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:36,332 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301727156] [2021-03-10 21:09:36,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:36,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:36,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301727156] [2021-03-10 21:09:36,379 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778885724] [2021-03-10 21:09:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:36,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:36,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:36,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:36,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:36,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:36,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:36,448 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:36,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-03-10 21:09:36,469 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:36,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:36,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:09:36,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821474574] [2021-03-10 21:09:36,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:36,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:36,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:36,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:36,470 INFO L87 Difference]: Start difference. First operand 2803 states and 10156 transitions. Second operand has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:36,667 INFO L93 Difference]: Finished difference Result 4194 states and 14536 transitions. [2021-03-10 21:09:36,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:36,667 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:36,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:36,675 INFO L225 Difference]: With dead ends: 4194 [2021-03-10 21:09:36,675 INFO L226 Difference]: Without dead ends: 3873 [2021-03-10 21:09:36,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:36,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2021-03-10 21:09:36,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 2849. [2021-03-10 21:09:36,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2849 states, 2848 states have (on average 3.5610955056179776) internal successors, (10142), 2848 states have internal predecessors, (10142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2849 states to 2849 states and 10142 transitions. [2021-03-10 21:09:36,726 INFO L78 Accepts]: Start accepts. Automaton has 2849 states and 10142 transitions. Word has length 24 [2021-03-10 21:09:36,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:36,726 INFO L480 AbstractCegarLoop]: Abstraction has 2849 states and 10142 transitions. [2021-03-10 21:09:36,726 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.666666666666667) internal successors, (42), 8 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:36,726 INFO L276 IsEmpty]: Start isEmpty. Operand 2849 states and 10142 transitions. [2021-03-10 21:09:36,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:36,731 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:36,731 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:36,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:36,947 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:36,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:36,947 INFO L82 PathProgramCache]: Analyzing trace with hash -37818295, now seen corresponding path program 2 times [2021-03-10 21:09:36,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:36,947 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405161002] [2021-03-10 21:09:36,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:36,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:36,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:36,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405161002] [2021-03-10 21:09:36,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969811355] [2021-03-10 21:09:36,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:37,029 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:37,029 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:37,030 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:09:37,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:37,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:37,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:37,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:37,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:37,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:15 [2021-03-10 21:09:37,099 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:37,099 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:37,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 21:09:37,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257168123] [2021-03-10 21:09:37,100 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:37,100 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:37,101 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:37,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:37,101 INFO L87 Difference]: Start difference. First operand 2849 states and 10142 transitions. Second operand has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:37,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:37,304 INFO L93 Difference]: Finished difference Result 4191 states and 14422 transitions. [2021-03-10 21:09:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:37,304 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:37,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:37,311 INFO L225 Difference]: With dead ends: 4191 [2021-03-10 21:09:37,312 INFO L226 Difference]: Without dead ends: 4191 [2021-03-10 21:09:37,312 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 100.2ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:37,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-03-10 21:09:37,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 2896. [2021-03-10 21:09:37,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2896 states, 2895 states have (on average 3.557858376511226) internal successors, (10300), 2895 states have internal predecessors, (10300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:37,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2896 states to 2896 states and 10300 transitions. [2021-03-10 21:09:37,373 INFO L78 Accepts]: Start accepts. Automaton has 2896 states and 10300 transitions. Word has length 24 [2021-03-10 21:09:37,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:37,373 INFO L480 AbstractCegarLoop]: Abstraction has 2896 states and 10300 transitions. [2021-03-10 21:09:37,373 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.1) internal successors, (41), 9 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:37,373 INFO L276 IsEmpty]: Start isEmpty. Operand 2896 states and 10300 transitions. [2021-03-10 21:09:37,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:37,378 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:37,378 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:37,591 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:37,591 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:37,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:37,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1702471575, now seen corresponding path program 1 times [2021-03-10 21:09:37,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:37,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153421753] [2021-03-10 21:09:37,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:37,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:37,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153421753] [2021-03-10 21:09:37,696 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304135001] [2021-03-10 21:09:37,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:37,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:37,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:37,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:37,837 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:37,837 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:37,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:09:37,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [261779469] [2021-03-10 21:09:37,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:09:37,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:37,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:09:37,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:37,839 INFO L87 Difference]: Start difference. First operand 2896 states and 10300 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:38,036 INFO L93 Difference]: Finished difference Result 3500 states and 12130 transitions. [2021-03-10 21:09:38,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:38,037 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:38,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:38,042 INFO L225 Difference]: With dead ends: 3500 [2021-03-10 21:09:38,042 INFO L226 Difference]: Without dead ends: 3143 [2021-03-10 21:09:38,042 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 183.3ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:09:38,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3143 states. [2021-03-10 21:09:38,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3143 to 2913. [2021-03-10 21:09:38,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2913 states, 2912 states have (on average 3.5442994505494507) internal successors, (10321), 2912 states have internal predecessors, (10321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2913 states to 2913 states and 10321 transitions. [2021-03-10 21:09:38,086 INFO L78 Accepts]: Start accepts. Automaton has 2913 states and 10321 transitions. Word has length 24 [2021-03-10 21:09:38,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:38,086 INFO L480 AbstractCegarLoop]: Abstraction has 2913 states and 10321 transitions. [2021-03-10 21:09:38,086 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,086 INFO L276 IsEmpty]: Start isEmpty. Operand 2913 states and 10321 transitions. [2021-03-10 21:09:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:38,092 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:38,092 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:38,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 21:09:38,306 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:38,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:38,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1483062673, now seen corresponding path program 2 times [2021-03-10 21:09:38,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:38,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411584062] [2021-03-10 21:09:38,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:38,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:38,411 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:38,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411584062] [2021-03-10 21:09:38,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [271424305] [2021-03-10 21:09:38,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:38,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:38,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:38,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:09:38,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:38,590 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:38,590 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:09:38,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842209792] [2021-03-10 21:09:38,591 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:38,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:38,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:38,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:38,591 INFO L87 Difference]: Start difference. First operand 2913 states and 10321 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:38,842 INFO L93 Difference]: Finished difference Result 3554 states and 12273 transitions. [2021-03-10 21:09:38,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:38,843 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:38,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:38,848 INFO L225 Difference]: With dead ends: 3554 [2021-03-10 21:09:38,848 INFO L226 Difference]: Without dead ends: 2994 [2021-03-10 21:09:38,848 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=97, Invalid=245, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:09:38,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2994 states. [2021-03-10 21:09:38,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2994 to 2784. [2021-03-10 21:09:38,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2784 states, 2783 states have (on average 3.5623427955443767) internal successors, (9914), 2783 states have internal predecessors, (9914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2784 states to 2784 states and 9914 transitions. [2021-03-10 21:09:38,891 INFO L78 Accepts]: Start accepts. Automaton has 2784 states and 9914 transitions. Word has length 24 [2021-03-10 21:09:38,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:38,892 INFO L480 AbstractCegarLoop]: Abstraction has 2784 states and 9914 transitions. [2021-03-10 21:09:38,892 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:38,892 INFO L276 IsEmpty]: Start isEmpty. Operand 2784 states and 9914 transitions. [2021-03-10 21:09:38,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:38,896 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:38,896 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:39,111 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:39,111 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:39,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:39,111 INFO L82 PathProgramCache]: Analyzing trace with hash -712088919, now seen corresponding path program 2 times [2021-03-10 21:09:39,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:39,112 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415022095] [2021-03-10 21:09:39,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:39,181 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:39,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415022095] [2021-03-10 21:09:39,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987659581] [2021-03-10 21:09:39,182 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:39,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:39,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:39,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-03-10 21:09:39,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:39,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:39,290 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-03-10 21:09:39,290 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498430625] [2021-03-10 21:09:39,290 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:39,290 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:39,290 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:39,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:39,291 INFO L87 Difference]: Start difference. First operand 2784 states and 9914 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:39,547 INFO L93 Difference]: Finished difference Result 3549 states and 12200 transitions. [2021-03-10 21:09:39,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:39,548 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:39,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:39,553 INFO L225 Difference]: With dead ends: 3549 [2021-03-10 21:09:39,553 INFO L226 Difference]: Without dead ends: 2970 [2021-03-10 21:09:39,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 191.0ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:09:39,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2970 states. [2021-03-10 21:09:39,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2970 to 2530. [2021-03-10 21:09:39,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.5630684064847764) internal successors, (9011), 2529 states have internal predecessors, (9011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9011 transitions. [2021-03-10 21:09:39,593 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9011 transitions. Word has length 24 [2021-03-10 21:09:39,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:39,593 INFO L480 AbstractCegarLoop]: Abstraction has 2530 states and 9011 transitions. [2021-03-10 21:09:39,593 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:39,593 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9011 transitions. [2021-03-10 21:09:39,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:39,597 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:39,597 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:39,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 21:09:39,811 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:39,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:39,812 INFO L82 PathProgramCache]: Analyzing trace with hash 1948181261, now seen corresponding path program 3 times [2021-03-10 21:09:39,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:39,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806966060] [2021-03-10 21:09:39,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:39,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:39,894 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:39,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806966060] [2021-03-10 21:09:39,894 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836500097] [2021-03-10 21:09:39,894 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 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 [2021-03-10 21:09:39,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:09:39,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:39,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:39,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:39,959 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:09:39,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:39,963 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:39,963 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:39,963 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-03-10 21:09:39,988 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:39,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:39,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:09:39,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939521767] [2021-03-10 21:09:39,989 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:39,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:39,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:39,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:39,990 INFO L87 Difference]: Start difference. First operand 2530 states and 9011 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:40,179 INFO L93 Difference]: Finished difference Result 3018 states and 10501 transitions. [2021-03-10 21:09:40,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:40,179 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:40,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:40,184 INFO L225 Difference]: With dead ends: 3018 [2021-03-10 21:09:40,184 INFO L226 Difference]: Without dead ends: 2877 [2021-03-10 21:09:40,184 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 114.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:40,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2877 states. [2021-03-10 21:09:40,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2877 to 2245. [2021-03-10 21:09:40,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2245 states, 2244 states have (on average 3.57174688057041) internal successors, (8015), 2244 states have internal predecessors, (8015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2245 states to 2245 states and 8015 transitions. [2021-03-10 21:09:40,220 INFO L78 Accepts]: Start accepts. Automaton has 2245 states and 8015 transitions. Word has length 24 [2021-03-10 21:09:40,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:40,221 INFO L480 AbstractCegarLoop]: Abstraction has 2245 states and 8015 transitions. [2021-03-10 21:09:40,221 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 10 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,221 INFO L276 IsEmpty]: Start isEmpty. Operand 2245 states and 8015 transitions. [2021-03-10 21:09:40,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:40,224 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:40,224 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:40,439 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 21:09:40,440 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:40,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:40,440 INFO L82 PathProgramCache]: Analyzing trace with hash 1874823949, now seen corresponding path program 3 times [2021-03-10 21:09:40,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:40,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327817416] [2021-03-10 21:09:40,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:40,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:40,493 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:40,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327817416] [2021-03-10 21:09:40,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740163933] [2021-03-10 21:09:40,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:40,511 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-03-10 21:09:40,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:40,511 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:09:40,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:40,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:40,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:40,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:40,549 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:40,549 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-03-10 21:09:40,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:40,572 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:40,573 INFO L628 ElimStorePlain]: treesize reduction 11, result has 8.3 percent of original size [2021-03-10 21:09:40,573 INFO L518 ElimStorePlain]: Eliminatee C vanished before elimination [2021-03-10 21:09:40,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:40,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:19, output treesize:1 [2021-03-10 21:09:40,578 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:40,578 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:40,578 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2021-03-10 21:09:40,578 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598531839] [2021-03-10 21:09:40,578 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:40,578 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:40,578 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:40,578 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:40,578 INFO L87 Difference]: Start difference. First operand 2245 states and 8015 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:40,727 INFO L93 Difference]: Finished difference Result 2348 states and 8049 transitions. [2021-03-10 21:09:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:40,730 INFO L225 Difference]: With dead ends: 2348 [2021-03-10 21:09:40,731 INFO L226 Difference]: Without dead ends: 1865 [2021-03-10 21:09:40,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 82.9ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:40,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1865 states. [2021-03-10 21:09:40,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1865 to 1682. [2021-03-10 21:09:40,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1682 states, 1681 states have (on average 3.534205829863177) internal successors, (5941), 1681 states have internal predecessors, (5941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1682 states to 1682 states and 5941 transitions. [2021-03-10 21:09:40,755 INFO L78 Accepts]: Start accepts. Automaton has 1682 states and 5941 transitions. Word has length 24 [2021-03-10 21:09:40,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:40,755 INFO L480 AbstractCegarLoop]: Abstraction has 1682 states and 5941 transitions. [2021-03-10 21:09:40,755 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 9 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:40,755 INFO L276 IsEmpty]: Start isEmpty. Operand 1682 states and 5941 transitions. [2021-03-10 21:09:40,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:40,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:40,758 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:40,971 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 21:09:40,971 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:40,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:40,971 INFO L82 PathProgramCache]: Analyzing trace with hash -853710037, now seen corresponding path program 4 times [2021-03-10 21:09:40,971 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:40,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935660211] [2021-03-10 21:09:40,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:40,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:41,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:41,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935660211] [2021-03-10 21:09:41,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515001371] [2021-03-10 21:09:41,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:41,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:41,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:41,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:41,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:41,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:09:41,085 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:41,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:41,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:41,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-03-10 21:09:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:41,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:41,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-03-10 21:09:41,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323753045] [2021-03-10 21:09:41,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:41,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:41,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:41,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:41,104 INFO L87 Difference]: Start difference. First operand 1682 states and 5941 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:41,258 INFO L93 Difference]: Finished difference Result 1960 states and 6819 transitions. [2021-03-10 21:09:41,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:41,259 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:41,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:41,262 INFO L225 Difference]: With dead ends: 1960 [2021-03-10 21:09:41,262 INFO L226 Difference]: Without dead ends: 1960 [2021-03-10 21:09:41,262 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:41,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1960 states. [2021-03-10 21:09:41,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1960 to 1766. [2021-03-10 21:09:41,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1766 states, 1765 states have (on average 3.5235127478753543) internal successors, (6219), 1765 states have internal predecessors, (6219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1766 states to 1766 states and 6219 transitions. [2021-03-10 21:09:41,286 INFO L78 Accepts]: Start accepts. Automaton has 1766 states and 6219 transitions. Word has length 24 [2021-03-10 21:09:41,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:41,286 INFO L480 AbstractCegarLoop]: Abstraction has 1766 states and 6219 transitions. [2021-03-10 21:09:41,286 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,286 INFO L276 IsEmpty]: Start isEmpty. Operand 1766 states and 6219 transitions. [2021-03-10 21:09:41,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:41,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:41,289 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:41,503 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-03-10 21:09:41,503 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:41,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:41,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1540696521, now seen corresponding path program 5 times [2021-03-10 21:09:41,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:41,504 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018359758] [2021-03-10 21:09:41,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:41,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:41,545 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:41,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018359758] [2021-03-10 21:09:41,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360698161] [2021-03-10 21:09:41,545 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:41,563 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:09:41,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:41,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:41,564 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:41,593 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:41,594 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:41,596 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:41,597 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:41,597 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-03-10 21:09:41,617 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:41,618 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:41,618 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-03-10 21:09:41,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777592322] [2021-03-10 21:09:41,618 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:41,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:41,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:41,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:41,618 INFO L87 Difference]: Start difference. First operand 1766 states and 6219 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:41,767 INFO L93 Difference]: Finished difference Result 2391 states and 8090 transitions. [2021-03-10 21:09:41,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:41,768 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:41,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:41,771 INFO L225 Difference]: With dead ends: 2391 [2021-03-10 21:09:41,771 INFO L226 Difference]: Without dead ends: 2391 [2021-03-10 21:09:41,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 90.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:41,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-03-10 21:09:41,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 1808. [2021-03-10 21:09:41,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1808 states, 1807 states have (on average 3.493082457111234) internal successors, (6312), 1807 states have internal predecessors, (6312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1808 states to 1808 states and 6312 transitions. [2021-03-10 21:09:41,798 INFO L78 Accepts]: Start accepts. Automaton has 1808 states and 6312 transitions. Word has length 24 [2021-03-10 21:09:41,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:41,798 INFO L480 AbstractCegarLoop]: Abstraction has 1808 states and 6312 transitions. [2021-03-10 21:09:41,798 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:41,798 INFO L276 IsEmpty]: Start isEmpty. Operand 1808 states and 6312 transitions. [2021-03-10 21:09:41,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:41,801 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:41,801 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:42,015 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 21:09:42,015 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:42,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:42,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1089617495, now seen corresponding path program 3 times [2021-03-10 21:09:42,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:42,016 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791450548] [2021-03-10 21:09:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:42,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:42,132 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:42,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791450548] [2021-03-10 21:09:42,132 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981797172] [2021-03-10 21:09:42,132 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:42,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:09:42,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:42,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 15 conjunts are in the unsatisfiable core [2021-03-10 21:09:42,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:42,282 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:42,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:42,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:09:42,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026733576] [2021-03-10 21:09:42,282 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:42,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:42,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:42,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:42,283 INFO L87 Difference]: Start difference. First operand 1808 states and 6312 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:42,558 INFO L93 Difference]: Finished difference Result 2394 states and 8168 transitions. [2021-03-10 21:09:42,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:42,558 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:42,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:42,562 INFO L225 Difference]: With dead ends: 2394 [2021-03-10 21:09:42,562 INFO L226 Difference]: Without dead ends: 2009 [2021-03-10 21:09:42,562 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 256.3ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:09:42,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2009 states. [2021-03-10 21:09:42,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2009 to 1815. [2021-03-10 21:09:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1815 states, 1814 states have (on average 3.4911797133406837) internal successors, (6333), 1814 states have internal predecessors, (6333), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1815 states to 1815 states and 6333 transitions. [2021-03-10 21:09:42,601 INFO L78 Accepts]: Start accepts. Automaton has 1815 states and 6333 transitions. Word has length 24 [2021-03-10 21:09:42,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:42,601 INFO L480 AbstractCegarLoop]: Abstraction has 1815 states and 6333 transitions. [2021-03-10 21:09:42,602 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:42,602 INFO L276 IsEmpty]: Start isEmpty. Operand 1815 states and 6333 transitions. [2021-03-10 21:09:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:42,604 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:42,604 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:42,811 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:42,811 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:42,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:42,811 INFO L82 PathProgramCache]: Analyzing trace with hash 2129098641, now seen corresponding path program 6 times [2021-03-10 21:09:42,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:42,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814896471] [2021-03-10 21:09:42,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:42,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:42,861 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:42,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814896471] [2021-03-10 21:09:42,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547269266] [2021-03-10 21:09:42,861 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:42,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-03-10 21:09:42,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:42,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:42,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:42,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:09:42,911 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:42,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:42,915 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:42,915 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-03-10 21:09:42,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:42,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:42,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:09:42,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37370282] [2021-03-10 21:09:42,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:42,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:42,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:42,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:42,943 INFO L87 Difference]: Start difference. First operand 1815 states and 6333 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:43,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:43,122 INFO L93 Difference]: Finished difference Result 1917 states and 6462 transitions. [2021-03-10 21:09:43,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:43,122 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:43,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:43,125 INFO L225 Difference]: With dead ends: 1917 [2021-03-10 21:09:43,125 INFO L226 Difference]: Without dead ends: 1917 [2021-03-10 21:09:43,126 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 102.6ms TimeCoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:43,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1917 states. [2021-03-10 21:09:43,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1917 to 1603. [2021-03-10 21:09:43,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1603 states, 1602 states have (on average 3.4419475655430714) internal successors, (5514), 1602 states have internal predecessors, (5514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:43,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1603 states to 1603 states and 5514 transitions. [2021-03-10 21:09:43,146 INFO L78 Accepts]: Start accepts. Automaton has 1603 states and 5514 transitions. Word has length 24 [2021-03-10 21:09:43,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:43,146 INFO L480 AbstractCegarLoop]: Abstraction has 1603 states and 5514 transitions. [2021-03-10 21:09:43,146 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:43,146 INFO L276 IsEmpty]: Start isEmpty. Operand 1603 states and 5514 transitions. [2021-03-10 21:09:43,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:43,148 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:43,148 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:43,349 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 21:09:43,349 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:43,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:43,349 INFO L82 PathProgramCache]: Analyzing trace with hash 131099393, now seen corresponding path program 4 times [2021-03-10 21:09:43,349 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:43,349 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519112183] [2021-03-10 21:09:43,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:43,426 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:43,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519112183] [2021-03-10 21:09:43,426 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813335154] [2021-03-10 21:09:43,426 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:43,443 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:43,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:43,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 21:09:43,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:43,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-03-10 21:09:43,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:43,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:43,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:43,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:20 [2021-03-10 21:09:43,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:43,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:43,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 11 [2021-03-10 21:09:43,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164321036] [2021-03-10 21:09:43,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:09:43,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:43,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:09:43,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:43,537 INFO L87 Difference]: Start difference. First operand 1603 states and 5514 transitions. Second operand has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:43,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:43,896 INFO L93 Difference]: Finished difference Result 1697 states and 5720 transitions. [2021-03-10 21:09:43,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:09:43,896 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:43,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:43,898 INFO L225 Difference]: With dead ends: 1697 [2021-03-10 21:09:43,899 INFO L226 Difference]: Without dead ends: 1585 [2021-03-10 21:09:43,899 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 250.8ms TimeCoverageRelationStatistics Valid=106, Invalid=274, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:09:43,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1585 states. [2021-03-10 21:09:43,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1585 to 1441. [2021-03-10 21:09:43,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 3.484027777777778) internal successors, (5017), 1440 states have internal predecessors, (5017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:43,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 5017 transitions. [2021-03-10 21:09:43,927 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 5017 transitions. Word has length 24 [2021-03-10 21:09:43,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:43,927 INFO L480 AbstractCegarLoop]: Abstraction has 1441 states and 5017 transitions. [2021-03-10 21:09:43,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.4166666666666665) internal successors, (41), 11 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:43,927 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 5017 transitions. [2021-03-10 21:09:43,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:43,929 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:43,929 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:44,143 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:44,143 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:44,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:44,144 INFO L82 PathProgramCache]: Analyzing trace with hash 316647389, now seen corresponding path program 4 times [2021-03-10 21:09:44,144 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:44,144 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300638912] [2021-03-10 21:09:44,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:44,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300638912] [2021-03-10 21:09:44,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677378155] [2021-03-10 21:09:44,277 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:44,294 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:44,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:44,294 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:44,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:44,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:44,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:09:44,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067535810] [2021-03-10 21:09:44,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:09:44,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:44,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:09:44,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:44,406 INFO L87 Difference]: Start difference. First operand 1441 states and 5017 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:44,700 INFO L93 Difference]: Finished difference Result 2294 states and 7707 transitions. [2021-03-10 21:09:44,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:44,700 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:44,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:44,703 INFO L225 Difference]: With dead ends: 2294 [2021-03-10 21:09:44,703 INFO L226 Difference]: Without dead ends: 1587 [2021-03-10 21:09:44,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 275.9ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:09:44,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1587 states. [2021-03-10 21:09:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1587 to 1425. [2021-03-10 21:09:44,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1425 states, 1424 states have (on average 3.4985955056179776) internal successors, (4982), 1424 states have internal predecessors, (4982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1425 states to 1425 states and 4982 transitions. [2021-03-10 21:09:44,721 INFO L78 Accepts]: Start accepts. Automaton has 1425 states and 4982 transitions. Word has length 24 [2021-03-10 21:09:44,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:44,722 INFO L480 AbstractCegarLoop]: Abstraction has 1425 states and 4982 transitions. [2021-03-10 21:09:44,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:44,722 INFO L276 IsEmpty]: Start isEmpty. Operand 1425 states and 4982 transitions. [2021-03-10 21:09:44,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 21:09:44,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:44,724 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:44,939 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 21:09:44,939 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:44,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash -2118036169, now seen corresponding path program 5 times [2021-03-10 21:09:44,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:44,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072875191] [2021-03-10 21:09:44,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:44,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:45,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:45,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072875191] [2021-03-10 21:09:45,067 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1194493828] [2021-03-10 21:09:45,067 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:45,090 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:45,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:45,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:45,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:45,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:45,203 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:45,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:09:45,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137312588] [2021-03-10 21:09:45,203 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:09:45,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:45,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:09:45,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:45,203 INFO L87 Difference]: Start difference. First operand 1425 states and 4982 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:45,542 INFO L93 Difference]: Finished difference Result 2525 states and 8394 transitions. [2021-03-10 21:09:45,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-03-10 21:09:45,543 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 21:09:45,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:45,545 INFO L225 Difference]: With dead ends: 2525 [2021-03-10 21:09:45,545 INFO L226 Difference]: Without dead ends: 1322 [2021-03-10 21:09:45,545 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 297.8ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-03-10 21:09:45,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1322 states. [2021-03-10 21:09:45,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1322 to 1194. [2021-03-10 21:09:45,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1194 states, 1193 states have (on average 3.5146689019279127) internal successors, (4193), 1193 states have internal predecessors, (4193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1194 states to 1194 states and 4193 transitions. [2021-03-10 21:09:45,559 INFO L78 Accepts]: Start accepts. Automaton has 1194 states and 4193 transitions. Word has length 24 [2021-03-10 21:09:45,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:45,559 INFO L480 AbstractCegarLoop]: Abstraction has 1194 states and 4193 transitions. [2021-03-10 21:09:45,559 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:45,559 INFO L276 IsEmpty]: Start isEmpty. Operand 1194 states and 4193 transitions. [2021-03-10 21:09:45,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:09:45,561 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:45,561 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:45,761 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:45,761 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:45,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:45,761 INFO L82 PathProgramCache]: Analyzing trace with hash -579383647, now seen corresponding path program 4 times [2021-03-10 21:09:45,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:45,762 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031060038] [2021-03-10 21:09:45,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:45,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:45,805 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031060038] [2021-03-10 21:09:45,805 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1812818534] [2021-03-10 21:09:45,805 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:45,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:45,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:45,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:09:45,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:45,883 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:45,884 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:45,884 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:09:45,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495808483] [2021-03-10 21:09:45,884 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:45,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:45,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:45,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:45,884 INFO L87 Difference]: Start difference. First operand 1194 states and 4193 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:46,063 INFO L93 Difference]: Finished difference Result 4855 states and 16678 transitions. [2021-03-10 21:09:46,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:09:46,063 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:09:46,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:46,070 INFO L225 Difference]: With dead ends: 4855 [2021-03-10 21:09:46,071 INFO L226 Difference]: Without dead ends: 4220 [2021-03-10 21:09:46,071 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:09:46,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-03-10 21:09:46,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 2463. [2021-03-10 21:09:46,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2463 states, 2462 states have (on average 3.7680747359870024) internal successors, (9277), 2462 states have internal predecessors, (9277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2463 states to 2463 states and 9277 transitions. [2021-03-10 21:09:46,115 INFO L78 Accepts]: Start accepts. Automaton has 2463 states and 9277 transitions. Word has length 27 [2021-03-10 21:09:46,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:46,115 INFO L480 AbstractCegarLoop]: Abstraction has 2463 states and 9277 transitions. [2021-03-10 21:09:46,115 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 9 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,115 INFO L276 IsEmpty]: Start isEmpty. Operand 2463 states and 9277 transitions. [2021-03-10 21:09:46,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:09:46,119 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:46,119 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:46,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-03-10 21:09:46,319 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:46,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:46,320 INFO L82 PathProgramCache]: Analyzing trace with hash 755204605, now seen corresponding path program 1 times [2021-03-10 21:09:46,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:46,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392133884] [2021-03-10 21:09:46,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:46,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:46,354 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:46,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392133884] [2021-03-10 21:09:46,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916607089] [2021-03-10 21:09:46,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:46,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:46,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 21:09:46,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:46,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:09:46,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:46,421 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:46,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:46,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-03-10 21:09:46,437 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:46,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:46,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-03-10 21:09:46,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131988908] [2021-03-10 21:09:46,437 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:46,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:46,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:46,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:46,438 INFO L87 Difference]: Start difference. First operand 2463 states and 9277 transitions. Second operand has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:46,569 INFO L93 Difference]: Finished difference Result 2900 states and 10794 transitions. [2021-03-10 21:09:46,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:46,569 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:09:46,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:46,574 INFO L225 Difference]: With dead ends: 2900 [2021-03-10 21:09:46,574 INFO L226 Difference]: Without dead ends: 2900 [2021-03-10 21:09:46,575 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 82.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:46,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2900 states. [2021-03-10 21:09:46,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2900 to 2715. [2021-03-10 21:09:46,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2715 states, 2714 states have (on average 3.7446573323507737) internal successors, (10163), 2714 states have internal predecessors, (10163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2715 states to 2715 states and 10163 transitions. [2021-03-10 21:09:46,614 INFO L78 Accepts]: Start accepts. Automaton has 2715 states and 10163 transitions. Word has length 27 [2021-03-10 21:09:46,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:46,615 INFO L480 AbstractCegarLoop]: Abstraction has 2715 states and 10163 transitions. [2021-03-10 21:09:46,615 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.6) internal successors, (46), 9 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:46,615 INFO L276 IsEmpty]: Start isEmpty. Operand 2715 states and 10163 transitions. [2021-03-10 21:09:46,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:09:46,619 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:46,619 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:46,823 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:46,837 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:46,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:46,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1627375381, now seen corresponding path program 5 times [2021-03-10 21:09:46,837 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:46,837 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308120651] [2021-03-10 21:09:46,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:46,861 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308120651] [2021-03-10 21:09:46,862 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115145140] [2021-03-10 21:09:46,862 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:46,884 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:09:46,885 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:46,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:09:46,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:46,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:46,935 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-03-10 21:09:46,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708959563] [2021-03-10 21:09:46,935 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:09:46,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:46,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:09:46,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:09:46,935 INFO L87 Difference]: Start difference. First operand 2715 states and 10163 transitions. Second operand has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:47,055 INFO L93 Difference]: Finished difference Result 4104 states and 14320 transitions. [2021-03-10 21:09:47,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:47,055 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:09:47,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:47,061 INFO L225 Difference]: With dead ends: 4104 [2021-03-10 21:09:47,061 INFO L226 Difference]: Without dead ends: 3590 [2021-03-10 21:09:47,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 61.8ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:47,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3590 states. [2021-03-10 21:09:47,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3590 to 2605. [2021-03-10 21:09:47,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2605 states, 2604 states have (on average 3.736175115207373) internal successors, (9729), 2604 states have internal predecessors, (9729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2605 states to 2605 states and 9729 transitions. [2021-03-10 21:09:47,102 INFO L78 Accepts]: Start accepts. Automaton has 2605 states and 9729 transitions. Word has length 27 [2021-03-10 21:09:47,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:47,102 INFO L480 AbstractCegarLoop]: Abstraction has 2605 states and 9729 transitions. [2021-03-10 21:09:47,102 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.111111111111111) internal successors, (37), 8 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,102 INFO L276 IsEmpty]: Start isEmpty. Operand 2605 states and 9729 transitions. [2021-03-10 21:09:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:09:47,106 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:47,106 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:47,306 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-03-10 21:09:47,306 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:47,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:47,307 INFO L82 PathProgramCache]: Analyzing trace with hash 1329916833, now seen corresponding path program 6 times [2021-03-10 21:09:47,307 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:47,307 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340169699] [2021-03-10 21:09:47,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:47,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:47,333 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:47,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340169699] [2021-03-10 21:09:47,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17834003] [2021-03-10 21:09:47,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:09:47,363 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-03-10 21:09:47,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:47,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:09:47,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:47,404 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:47,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:47,404 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-03-10 21:09:47,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867685874] [2021-03-10 21:09:47,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-03-10 21:09:47,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:47,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-03-10 21:09:47,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-03-10 21:09:47,405 INFO L87 Difference]: Start difference. First operand 2605 states and 9729 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:47,507 INFO L93 Difference]: Finished difference Result 6383 states and 23381 transitions. [2021-03-10 21:09:47,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:47,508 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:09:47,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:47,519 INFO L225 Difference]: With dead ends: 6383 [2021-03-10 21:09:47,519 INFO L226 Difference]: Without dead ends: 6120 [2021-03-10 21:09:47,519 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 36.4ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:47,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6120 states. [2021-03-10 21:09:47,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6120 to 3682. [2021-03-10 21:09:47,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3682 states, 3681 states have (on average 3.838902472154306) internal successors, (14131), 3681 states have internal predecessors, (14131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3682 states to 3682 states and 14131 transitions. [2021-03-10 21:09:47,596 INFO L78 Accepts]: Start accepts. Automaton has 3682 states and 14131 transitions. Word has length 27 [2021-03-10 21:09:47,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:47,597 INFO L480 AbstractCegarLoop]: Abstraction has 3682 states and 14131 transitions. [2021-03-10 21:09:47,597 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:47,597 INFO L276 IsEmpty]: Start isEmpty. Operand 3682 states and 14131 transitions. [2021-03-10 21:09:47,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:09:47,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:47,605 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:47,819 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:47,819 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:47,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:47,820 INFO L82 PathProgramCache]: Analyzing trace with hash 1648096775, now seen corresponding path program 7 times [2021-03-10 21:09:47,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:47,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597178569] [2021-03-10 21:09:47,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:47,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:47,870 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:47,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597178569] [2021-03-10 21:09:47,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1657249996] [2021-03-10 21:09:47,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:47,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:47,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:09:47,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:47,941 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:47,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:47,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-03-10 21:09:47,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136841836] [2021-03-10 21:09:47,942 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-03-10 21:09:47,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:47,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-03-10 21:09:47,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-03-10 21:09:47,942 INFO L87 Difference]: Start difference. First operand 3682 states and 14131 transitions. Second operand has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,066 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:48,066 INFO L93 Difference]: Finished difference Result 6348 states and 23146 transitions. [2021-03-10 21:09:48,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 21:09:48,067 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:09:48,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:48,079 INFO L225 Difference]: With dead ends: 6348 [2021-03-10 21:09:48,079 INFO L226 Difference]: Without dead ends: 6043 [2021-03-10 21:09:48,079 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 47.4ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:48,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6043 states. [2021-03-10 21:09:48,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6043 to 3665. [2021-03-10 21:09:48,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3665 states, 3664 states have (on average 3.835698689956332) internal successors, (14054), 3664 states have internal predecessors, (14054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3665 states to 3665 states and 14054 transitions. [2021-03-10 21:09:48,154 INFO L78 Accepts]: Start accepts. Automaton has 3665 states and 14054 transitions. Word has length 27 [2021-03-10 21:09:48,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:48,154 INFO L480 AbstractCegarLoop]: Abstraction has 3665 states and 14054 transitions. [2021-03-10 21:09:48,154 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.5) internal successors, (36), 7 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3665 states and 14054 transitions. [2021-03-10 21:09:48,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:09:48,160 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:48,160 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:48,360 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-03-10 21:09:48,360 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:48,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:48,360 INFO L82 PathProgramCache]: Analyzing trace with hash 888507809, now seen corresponding path program 8 times [2021-03-10 21:09:48,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:48,361 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1699762543] [2021-03-10 21:09:48,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:48,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:48,397 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:48,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1699762543] [2021-03-10 21:09:48,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998806778] [2021-03-10 21:09:48,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:48,422 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:48,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:48,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 21:09:48,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:48,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:48,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:48,491 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-03-10 21:09:48,491 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983288705] [2021-03-10 21:09:48,492 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:09:48,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:48,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:09:48,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:09:48,492 INFO L87 Difference]: Start difference. First operand 3665 states and 14054 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:48,612 INFO L93 Difference]: Finished difference Result 6084 states and 22333 transitions. [2021-03-10 21:09:48,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 21:09:48,612 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:09:48,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:48,623 INFO L225 Difference]: With dead ends: 6084 [2021-03-10 21:09:48,623 INFO L226 Difference]: Without dead ends: 5719 [2021-03-10 21:09:48,623 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 74.0ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:48,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5719 states. [2021-03-10 21:09:48,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5719 to 3863. [2021-03-10 21:09:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3863 states, 3862 states have (on average 3.79207664422579) internal successors, (14645), 3862 states have internal predecessors, (14645), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3863 states to 3863 states and 14645 transitions. [2021-03-10 21:09:48,693 INFO L78 Accepts]: Start accepts. Automaton has 3863 states and 14645 transitions. Word has length 27 [2021-03-10 21:09:48,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:48,693 INFO L480 AbstractCegarLoop]: Abstraction has 3863 states and 14645 transitions. [2021-03-10 21:09:48,693 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:48,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3863 states and 14645 transitions. [2021-03-10 21:09:48,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:09:48,699 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:48,699 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:48,903 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-03-10 21:09:48,903 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:48,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:48,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1455495413, now seen corresponding path program 2 times [2021-03-10 21:09:48,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:48,904 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882986878] [2021-03-10 21:09:48,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:48,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:48,975 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:48,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882986878] [2021-03-10 21:09:48,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1677685528] [2021-03-10 21:09:48,975 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:48,996 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:48,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:48,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:48,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:49,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:09:49,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:49,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:49,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:49,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-03-10 21:09:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:49,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:49,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:09:49,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572504899] [2021-03-10 21:09:49,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:49,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:49,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:49,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:49,067 INFO L87 Difference]: Start difference. First operand 3863 states and 14645 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:49,212 INFO L93 Difference]: Finished difference Result 4238 states and 15960 transitions. [2021-03-10 21:09:49,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:49,213 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:09:49,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:49,220 INFO L225 Difference]: With dead ends: 4238 [2021-03-10 21:09:49,220 INFO L226 Difference]: Without dead ends: 4238 [2021-03-10 21:09:49,220 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 142.5ms TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:49,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4238 states. [2021-03-10 21:09:49,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4238 to 3841. [2021-03-10 21:09:49,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3841 states, 3840 states have (on average 3.7955729166666665) internal successors, (14575), 3840 states have internal predecessors, (14575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3841 states to 3841 states and 14575 transitions. [2021-03-10 21:09:49,313 INFO L78 Accepts]: Start accepts. Automaton has 3841 states and 14575 transitions. Word has length 27 [2021-03-10 21:09:49,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:49,313 INFO L480 AbstractCegarLoop]: Abstraction has 3841 states and 14575 transitions. [2021-03-10 21:09:49,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3841 states and 14575 transitions. [2021-03-10 21:09:49,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-03-10 21:09:49,319 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:49,319 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:49,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-03-10 21:09:49,520 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash -735459267, now seen corresponding path program 3 times [2021-03-10 21:09:49,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:49,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878674883] [2021-03-10 21:09:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:49,576 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:49,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878674883] [2021-03-10 21:09:49,576 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999408213] [2021-03-10 21:09:49,576 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:49,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:09:49,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:49,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:49,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:49,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:09:49,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:09:49,643 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:09:49,643 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:09:49,643 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-03-10 21:09:49,663 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 21:09:49,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:49,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-03-10 21:09:49,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128169492] [2021-03-10 21:09:49,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:49,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:49,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:49,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:49,664 INFO L87 Difference]: Start difference. First operand 3841 states and 14575 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:49,796 INFO L93 Difference]: Finished difference Result 4341 states and 16322 transitions. [2021-03-10 21:09:49,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-03-10 21:09:49,797 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-03-10 21:09:49,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:49,805 INFO L225 Difference]: With dead ends: 4341 [2021-03-10 21:09:49,805 INFO L226 Difference]: Without dead ends: 4341 [2021-03-10 21:09:49,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 96.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:49,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4341 states. [2021-03-10 21:09:49,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4341 to 3829. [2021-03-10 21:09:49,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 3.797544409613375) internal successors, (14537), 3828 states have internal predecessors, (14537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 14537 transitions. [2021-03-10 21:09:49,859 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 14537 transitions. Word has length 27 [2021-03-10 21:09:49,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:49,860 INFO L480 AbstractCegarLoop]: Abstraction has 3829 states and 14537 transitions. [2021-03-10 21:09:49,860 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:49,860 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 14537 transitions. [2021-03-10 21:09:49,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:09:49,865 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:49,865 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:50,066 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 21:09:50,066 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:50,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:50,066 INFO L82 PathProgramCache]: Analyzing trace with hash -393228176, now seen corresponding path program 9 times [2021-03-10 21:09:50,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:50,066 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515524519] [2021-03-10 21:09:50,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:50,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:50,107 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:50,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515524519] [2021-03-10 21:09:50,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344303916] [2021-03-10 21:09:50,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:50,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:09:50,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:50,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:50,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 21:09:50,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:50,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:09:50,222 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970100716] [2021-03-10 21:09:50,222 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:09:50,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:50,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:09:50,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:09:50,223 INFO L87 Difference]: Start difference. First operand 3829 states and 14537 transitions. Second operand has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:51,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:51,208 INFO L93 Difference]: Finished difference Result 16065 states and 58994 transitions. [2021-03-10 21:09:51,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:09:51,209 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:09:51,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:51,242 INFO L225 Difference]: With dead ends: 16065 [2021-03-10 21:09:51,242 INFO L226 Difference]: Without dead ends: 15529 [2021-03-10 21:09:51,243 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 441.9ms TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 21:09:51,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15529 states. [2021-03-10 21:09:51,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15529 to 9567. [2021-03-10 21:09:51,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9567 states, 9566 states have (on average 4.004599623667154) internal successors, (38308), 9566 states have internal predecessors, (38308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:51,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9567 states to 9567 states and 38308 transitions. [2021-03-10 21:09:51,472 INFO L78 Accepts]: Start accepts. Automaton has 9567 states and 38308 transitions. Word has length 30 [2021-03-10 21:09:51,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:51,473 INFO L480 AbstractCegarLoop]: Abstraction has 9567 states and 38308 transitions. [2021-03-10 21:09:51,473 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.8) internal successors, (57), 14 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:51,473 INFO L276 IsEmpty]: Start isEmpty. Operand 9567 states and 38308 transitions. [2021-03-10 21:09:51,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:09:51,488 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:51,488 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:51,688 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:51,689 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:51,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:51,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1496580308, now seen corresponding path program 10 times [2021-03-10 21:09:51,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:51,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686248254] [2021-03-10 21:09:51,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:51,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:51,726 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:51,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686248254] [2021-03-10 21:09:51,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574741766] [2021-03-10 21:09:51,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:51,757 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:09:51,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:51,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:09:51,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:51,976 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:51,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:51,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-03-10 21:09:51,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945097617] [2021-03-10 21:09:51,976 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:09:51,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:51,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:09:51,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:09:51,977 INFO L87 Difference]: Start difference. First operand 9567 states and 38308 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2021-03-10 21:09:53,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:53,425 INFO L93 Difference]: Finished difference Result 32416 states and 123919 transitions. [2021-03-10 21:09:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:09:53,426 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 30 [2021-03-10 21:09:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:53,512 INFO L225 Difference]: With dead ends: 32416 [2021-03-10 21:09:53,512 INFO L226 Difference]: Without dead ends: 32119 [2021-03-10 21:09:53,513 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 719 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=575, Invalid=2287, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 21:09:53,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32119 states. [2021-03-10 21:09:53,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32119 to 20164. [2021-03-10 21:09:53,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20164 states, 20163 states have (on average 4.167931359420721) internal successors, (84038), 20163 states have internal predecessors, (84038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:54,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20164 states to 20164 states and 84038 transitions. [2021-03-10 21:09:54,138 INFO L78 Accepts]: Start accepts. Automaton has 20164 states and 84038 transitions. Word has length 30 [2021-03-10 21:09:54,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:54,138 INFO L480 AbstractCegarLoop]: Abstraction has 20164 states and 84038 transitions. [2021-03-10 21:09:54,138 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2021-03-10 21:09:54,138 INFO L276 IsEmpty]: Start isEmpty. Operand 20164 states and 84038 transitions. [2021-03-10 21:09:54,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:09:54,176 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:54,176 INFO L519 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] [2021-03-10 21:09:54,387 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-03-10 21:09:54,387 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:54,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:54,387 INFO L82 PathProgramCache]: Analyzing trace with hash 169617084, now seen corresponding path program 1 times [2021-03-10 21:09:54,387 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:54,387 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245317640] [2021-03-10 21:09:54,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:54,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:54,520 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:54,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245317640] [2021-03-10 21:09:54,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [386937091] [2021-03-10 21:09:54,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:54,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:54,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:09:54,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:54,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:54,629 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-03-10 21:09:54,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1810749000] [2021-03-10 21:09:54,630 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 21:09:54,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:54,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 21:09:54,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-03-10 21:09:54,630 INFO L87 Difference]: Start difference. First operand 20164 states and 84038 transitions. Second operand has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:55,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:55,051 INFO L93 Difference]: Finished difference Result 32875 states and 135844 transitions. [2021-03-10 21:09:55,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:55,051 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:09:55,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:55,153 INFO L225 Difference]: With dead ends: 32875 [2021-03-10 21:09:55,153 INFO L226 Difference]: Without dead ends: 32771 [2021-03-10 21:09:55,153 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 95.7ms TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:09:55,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32771 states. [2021-03-10 21:09:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32771 to 21058. [2021-03-10 21:09:55,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21058 states, 21057 states have (on average 4.178135536876098) internal successors, (87979), 21057 states have internal predecessors, (87979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:55,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21058 states to 21058 states and 87979 transitions. [2021-03-10 21:09:55,845 INFO L78 Accepts]: Start accepts. Automaton has 21058 states and 87979 transitions. Word has length 30 [2021-03-10 21:09:55,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:55,845 INFO L480 AbstractCegarLoop]: Abstraction has 21058 states and 87979 transitions. [2021-03-10 21:09:55,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.083333333333333) internal successors, (49), 11 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:55,845 INFO L276 IsEmpty]: Start isEmpty. Operand 21058 states and 87979 transitions. [2021-03-10 21:09:55,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:09:55,977 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:55,977 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:09:56,177 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 21:09:56,177 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:56,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:56,177 INFO L82 PathProgramCache]: Analyzing trace with hash 1212389954, now seen corresponding path program 11 times [2021-03-10 21:09:56,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:56,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383999890] [2021-03-10 21:09:56,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:56,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:56,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383999890] [2021-03-10 21:09:56,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346662667] [2021-03-10 21:09:56,226 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:56,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:09:56,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:56,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:56,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:56,314 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:56,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:56,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-03-10 21:09:56,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653326628] [2021-03-10 21:09:56,315 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:09:56,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:56,315 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:09:56,315 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:09:56,315 INFO L87 Difference]: Start difference. First operand 21058 states and 87979 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:56,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:56,839 INFO L93 Difference]: Finished difference Result 32771 states and 135158 transitions. [2021-03-10 21:09:56,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-03-10 21:09:56,840 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:09:56,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:56,934 INFO L225 Difference]: With dead ends: 32771 [2021-03-10 21:09:56,934 INFO L226 Difference]: Without dead ends: 32771 [2021-03-10 21:09:56,934 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 164.4ms TimeCoverageRelationStatistics Valid=100, Invalid=280, Unknown=0, NotChecked=0, Total=380 [2021-03-10 21:09:56,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32771 states. [2021-03-10 21:09:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32771 to 20609. [2021-03-10 21:09:57,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20609 states, 20608 states have (on average 4.176096661490683) internal successors, (86061), 20608 states have internal predecessors, (86061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:57,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20609 states to 20609 states and 86061 transitions. [2021-03-10 21:09:57,570 INFO L78 Accepts]: Start accepts. Automaton has 20609 states and 86061 transitions. Word has length 30 [2021-03-10 21:09:57,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:57,571 INFO L480 AbstractCegarLoop]: Abstraction has 20609 states and 86061 transitions. [2021-03-10 21:09:57,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:57,571 INFO L276 IsEmpty]: Start isEmpty. Operand 20609 states and 86061 transitions. [2021-03-10 21:09:57,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:09:57,725 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:57,725 INFO L519 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] [2021-03-10 21:09:57,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:57,926 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:57,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:57,926 INFO L82 PathProgramCache]: Analyzing trace with hash 1652752022, now seen corresponding path program 2 times [2021-03-10 21:09:57,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:57,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256870077] [2021-03-10 21:09:57,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:57,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:57,963 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:57,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256870077] [2021-03-10 21:09:57,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695981673] [2021-03-10 21:09:57,964 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:57,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:09:57,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:57,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:09:57,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:58,075 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:58,075 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:58,075 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-10 21:09:58,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808932844] [2021-03-10 21:09:58,076 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:09:58,076 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:58,076 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:09:58,076 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:09:58,076 INFO L87 Difference]: Start difference. First operand 20609 states and 86061 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:58,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:09:58,542 INFO L93 Difference]: Finished difference Result 31262 states and 129657 transitions. [2021-03-10 21:09:58,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-03-10 21:09:58,543 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:09:58,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:09:58,629 INFO L225 Difference]: With dead ends: 31262 [2021-03-10 21:09:58,630 INFO L226 Difference]: Without dead ends: 31068 [2021-03-10 21:09:58,630 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 134.8ms TimeCoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:09:58,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31068 states. [2021-03-10 21:09:59,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31068 to 20997. [2021-03-10 21:09:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20997 states, 20996 states have (on average 4.163316822251858) internal successors, (87413), 20996 states have internal predecessors, (87413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:59,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20997 states to 20997 states and 87413 transitions. [2021-03-10 21:09:59,144 INFO L78 Accepts]: Start accepts. Automaton has 20997 states and 87413 transitions. Word has length 30 [2021-03-10 21:09:59,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:09:59,145 INFO L480 AbstractCegarLoop]: Abstraction has 20997 states and 87413 transitions. [2021-03-10 21:09:59,145 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 12 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:09:59,145 INFO L276 IsEmpty]: Start isEmpty. Operand 20997 states and 87413 transitions. [2021-03-10 21:09:59,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:09:59,182 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:09:59,183 INFO L519 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] [2021-03-10 21:09:59,383 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 21:09:59,383 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:09:59,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:09:59,383 INFO L82 PathProgramCache]: Analyzing trace with hash -678375792, now seen corresponding path program 3 times [2021-03-10 21:09:59,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:09:59,384 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476476159] [2021-03-10 21:09:59,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:09:59,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:09:59,428 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:09:59,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476476159] [2021-03-10 21:09:59,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418309458] [2021-03-10 21:09:59,428 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:09:59,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:09:59,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:09:59,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:09:59,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:09:59,539 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:09:59,539 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:09:59,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:09:59,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244620696] [2021-03-10 21:09:59,539 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:09:59,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:09:59,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:09:59,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:09:59,540 INFO L87 Difference]: Start difference. First operand 20997 states and 87413 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-03-10 21:10:00,016 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 16 DAG size of output: 15 [2021-03-10 21:10:00,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:00,988 INFO L93 Difference]: Finished difference Result 48115 states and 193456 transitions. [2021-03-10 21:10:00,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:10:00,989 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-03-10 21:10:00,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:01,246 INFO L225 Difference]: With dead ends: 48115 [2021-03-10 21:10:01,246 INFO L226 Difference]: Without dead ends: 45715 [2021-03-10 21:10:01,247 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 642.5ms TimeCoverageRelationStatistics Valid=463, Invalid=1429, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:10:01,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45715 states. [2021-03-10 21:10:01,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45715 to 29642. [2021-03-10 21:10:02,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29642 states, 29641 states have (on average 4.249620458149185) internal successors, (125963), 29641 states have internal predecessors, (125963), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29642 states to 29642 states and 125963 transitions. [2021-03-10 21:10:02,133 INFO L78 Accepts]: Start accepts. Automaton has 29642 states and 125963 transitions. Word has length 30 [2021-03-10 21:10:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:02,133 INFO L480 AbstractCegarLoop]: Abstraction has 29642 states and 125963 transitions. [2021-03-10 21:10:02,134 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-03-10 21:10:02,134 INFO L276 IsEmpty]: Start isEmpty. Operand 29642 states and 125963 transitions. [2021-03-10 21:10:02,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:02,195 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:02,195 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:02,408 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:02,409 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:02,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:02,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1127375814, now seen corresponding path program 12 times [2021-03-10 21:10:02,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:02,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601045399] [2021-03-10 21:10:02,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:02,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:02,456 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:02,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601045399] [2021-03-10 21:10:02,457 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879505770] [2021-03-10 21:10:02,457 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:02,514 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:10:02,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:02,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:10:02,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:02,610 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:02,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:02,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-03-10 21:10:02,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11965908] [2021-03-10 21:10:02,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:10:02,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:02,611 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:10:02,611 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:02,611 INFO L87 Difference]: Start difference. First operand 29642 states and 125963 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-03-10 21:10:03,097 WARN L205 SmtUtils]: Spent 154.00 ms on a formula simplification that was a NOOP. DAG size: 12 [2021-03-10 21:10:04,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:04,235 INFO L93 Difference]: Finished difference Result 57043 states and 232836 transitions. [2021-03-10 21:10:04,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 21:10:04,235 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 30 [2021-03-10 21:10:04,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:04,425 INFO L225 Difference]: With dead ends: 57043 [2021-03-10 21:10:04,425 INFO L226 Difference]: Without dead ends: 55849 [2021-03-10 21:10:04,426 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=442, Invalid=1450, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 21:10:04,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55849 states. [2021-03-10 21:10:05,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55849 to 34621. [2021-03-10 21:10:05,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34621 states, 34620 states have (on average 4.300288850375505) internal successors, (148876), 34620 states have internal predecessors, (148876), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:05,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34621 states to 34621 states and 148876 transitions. [2021-03-10 21:10:05,533 INFO L78 Accepts]: Start accepts. Automaton has 34621 states and 148876 transitions. Word has length 30 [2021-03-10 21:10:05,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:05,534 INFO L480 AbstractCegarLoop]: Abstraction has 34621 states and 148876 transitions. [2021-03-10 21:10:05,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-03-10 21:10:05,534 INFO L276 IsEmpty]: Start isEmpty. Operand 34621 states and 148876 transitions. [2021-03-10 21:10:05,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:05,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:05,594 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:05,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-03-10 21:10:05,795 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:05,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:05,795 INFO L82 PathProgramCache]: Analyzing trace with hash 1494154336, now seen corresponding path program 13 times [2021-03-10 21:10:05,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:05,795 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274817334] [2021-03-10 21:10:05,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:05,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:05,826 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:05,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274817334] [2021-03-10 21:10:05,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059154078] [2021-03-10 21:10:05,827 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:05,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:05,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:10:05,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:05,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:05,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:05,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2021-03-10 21:10:05,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7910500] [2021-03-10 21:10:05,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:05,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:05,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:05,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:05,925 INFO L87 Difference]: Start difference. First operand 34621 states and 148876 transitions. Second operand has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:06,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:06,682 INFO L93 Difference]: Finished difference Result 64462 states and 274231 transitions. [2021-03-10 21:10:06,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:06,683 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:10:06,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:06,888 INFO L225 Difference]: With dead ends: 64462 [2021-03-10 21:10:06,888 INFO L226 Difference]: Without dead ends: 64292 [2021-03-10 21:10:06,888 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 107.3ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:10:06,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64292 states. [2021-03-10 21:10:08,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64292 to 38305. [2021-03-10 21:10:08,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38305 states, 38304 states have (on average 4.315972222222222) internal successors, (165319), 38304 states have internal predecessors, (165319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:08,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38305 states to 38305 states and 165319 transitions. [2021-03-10 21:10:08,344 INFO L78 Accepts]: Start accepts. Automaton has 38305 states and 165319 transitions. Word has length 30 [2021-03-10 21:10:08,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:08,344 INFO L480 AbstractCegarLoop]: Abstraction has 38305 states and 165319 transitions. [2021-03-10 21:10:08,345 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.454545454545454) internal successors, (49), 10 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:08,345 INFO L276 IsEmpty]: Start isEmpty. Operand 38305 states and 165319 transitions. [2021-03-10 21:10:08,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:08,420 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:08,420 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:08,620 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-03-10 21:10:08,621 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:08,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:08,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1280337958, now seen corresponding path program 14 times [2021-03-10 21:10:08,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:08,621 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63735174] [2021-03-10 21:10:08,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:08,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:08,649 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:08,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63735174] [2021-03-10 21:10:08,650 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488828074] [2021-03-10 21:10:08,650 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 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 [2021-03-10 21:10:08,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:08,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:08,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:10:08,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:08,743 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:08,743 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:08,743 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2021-03-10 21:10:08,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027813728] [2021-03-10 21:10:08,743 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:08,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:08,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:08,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:08,744 INFO L87 Difference]: Start difference. First operand 38305 states and 165319 transitions. Second operand has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:09,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:09,617 INFO L93 Difference]: Finished difference Result 63942 states and 272647 transitions. [2021-03-10 21:10:09,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-03-10 21:10:09,617 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 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 30 [2021-03-10 21:10:09,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:09,813 INFO L225 Difference]: With dead ends: 63942 [2021-03-10 21:10:09,814 INFO L226 Difference]: Without dead ends: 63920 [2021-03-10 21:10:09,814 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 103.1ms TimeCoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:10:09,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63920 states. [2021-03-10 21:10:10,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63920 to 38293. [2021-03-10 21:10:10,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38293 states, 38292 states have (on average 4.316541314112609) internal successors, (165289), 38292 states have internal predecessors, (165289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:11,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38293 states to 38293 states and 165289 transitions. [2021-03-10 21:10:11,082 INFO L78 Accepts]: Start accepts. Automaton has 38293 states and 165289 transitions. Word has length 30 [2021-03-10 21:10:11,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:11,082 INFO L480 AbstractCegarLoop]: Abstraction has 38293 states and 165289 transitions. [2021-03-10 21:10:11,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.0) internal successors, (44), 10 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:11,082 INFO L276 IsEmpty]: Start isEmpty. Operand 38293 states and 165289 transitions. [2021-03-10 21:10:11,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:11,150 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:11,150 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:11,351 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-03-10 21:10:11,351 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:11,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:11,351 INFO L82 PathProgramCache]: Analyzing trace with hash -693699998, now seen corresponding path program 15 times [2021-03-10 21:10:11,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:11,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764183166] [2021-03-10 21:10:11,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:11,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:11,389 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:11,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764183166] [2021-03-10 21:10:11,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1716493477] [2021-03-10 21:10:11,389 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:11,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:10:11,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:11,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:10:11,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:11,468 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:11,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:11,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 8 [2021-03-10 21:10:11,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980980547] [2021-03-10 21:10:11,468 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:11,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:11,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:11,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:11,468 INFO L87 Difference]: Start difference. First operand 38293 states and 165289 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:12,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:12,241 INFO L93 Difference]: Finished difference Result 70745 states and 301382 transitions. [2021-03-10 21:10:12,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:12,241 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:10:12,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:12,466 INFO L225 Difference]: With dead ends: 70745 [2021-03-10 21:10:12,466 INFO L226 Difference]: Without dead ends: 70633 [2021-03-10 21:10:12,466 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.9ms TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:10:12,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70633 states. [2021-03-10 21:10:13,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70633 to 38453. [2021-03-10 21:10:13,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38453 states, 38452 states have (on average 4.320035368771455) internal successors, (166114), 38452 states have internal predecessors, (166114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:14,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38453 states to 38453 states and 166114 transitions. [2021-03-10 21:10:14,110 INFO L78 Accepts]: Start accepts. Automaton has 38453 states and 166114 transitions. Word has length 30 [2021-03-10 21:10:14,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:14,110 INFO L480 AbstractCegarLoop]: Abstraction has 38453 states and 166114 transitions. [2021-03-10 21:10:14,110 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:14,110 INFO L276 IsEmpty]: Start isEmpty. Operand 38453 states and 166114 transitions. [2021-03-10 21:10:14,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:14,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:14,183 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:14,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-03-10 21:10:14,396 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:14,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:14,397 INFO L82 PathProgramCache]: Analyzing trace with hash -204741054, now seen corresponding path program 16 times [2021-03-10 21:10:14,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:14,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704617057] [2021-03-10 21:10:14,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:14,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:14,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704617057] [2021-03-10 21:10:14,463 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1822279800] [2021-03-10 21:10:14,463 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:14,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:14,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:14,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:10:14,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:14,679 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:14,679 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 11] total 16 [2021-03-10 21:10:14,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032092605] [2021-03-10 21:10:14,679 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 21:10:14,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:14,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 21:10:14,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=224, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:14,680 INFO L87 Difference]: Start difference. First operand 38453 states and 166114 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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) [2021-03-10 21:10:16,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:16,924 INFO L93 Difference]: Finished difference Result 116328 states and 475114 transitions. [2021-03-10 21:10:16,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-03-10 21:10:16,925 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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 30 [2021-03-10 21:10:16,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:17,568 INFO L225 Difference]: With dead ends: 116328 [2021-03-10 21:10:17,569 INFO L226 Difference]: Without dead ends: 115712 [2021-03-10 21:10:17,569 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1447 ImplicationChecksByTransitivity, 1043.5ms TimeCoverageRelationStatistics Valid=848, Invalid=3708, Unknown=0, NotChecked=0, Total=4556 [2021-03-10 21:10:17,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115712 states. [2021-03-10 21:10:19,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115712 to 51608. [2021-03-10 21:10:19,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51608 states, 51607 states have (on average 4.399093146278606) internal successors, (227024), 51607 states have internal predecessors, (227024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:20,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51608 states to 51608 states and 227024 transitions. [2021-03-10 21:10:20,017 INFO L78 Accepts]: Start accepts. Automaton has 51608 states and 227024 transitions. Word has length 30 [2021-03-10 21:10:20,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:20,017 INFO L480 AbstractCegarLoop]: Abstraction has 51608 states and 227024 transitions. [2021-03-10 21:10:20,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 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) [2021-03-10 21:10:20,018 INFO L276 IsEmpty]: Start isEmpty. Operand 51608 states and 227024 transitions. [2021-03-10 21:10:20,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:20,104 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:20,104 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:20,304 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:20,305 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:20,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:20,305 INFO L82 PathProgramCache]: Analyzing trace with hash 1496838664, now seen corresponding path program 17 times [2021-03-10 21:10:20,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:20,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447033395] [2021-03-10 21:10:20,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:20,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:20,336 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:20,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447033395] [2021-03-10 21:10:20,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [299696043] [2021-03-10 21:10:20,337 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:20,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 21:10:20,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:20,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:10:20,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:20,405 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:20,406 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:20,406 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 8 [2021-03-10 21:10:20,406 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364989567] [2021-03-10 21:10:20,406 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 21:10:20,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:20,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 21:10:20,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-03-10 21:10:20,406 INFO L87 Difference]: Start difference. First operand 51608 states and 227024 transitions. Second operand has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:21,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:21,434 INFO L93 Difference]: Finished difference Result 81502 states and 353781 transitions. [2021-03-10 21:10:21,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:21,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:10:21,435 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:21,697 INFO L225 Difference]: With dead ends: 81502 [2021-03-10 21:10:21,697 INFO L226 Difference]: Without dead ends: 81482 [2021-03-10 21:10:21,698 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 101.2ms TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:10:21,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81482 states. [2021-03-10 21:10:23,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81482 to 73641. [2021-03-10 21:10:23,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73641 states, 73640 states have (on average 4.443862031504617) internal successors, (327246), 73640 states have internal predecessors, (327246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73641 states to 73641 states and 327246 transitions. [2021-03-10 21:10:24,035 INFO L78 Accepts]: Start accepts. Automaton has 73641 states and 327246 transitions. Word has length 30 [2021-03-10 21:10:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:24,036 INFO L480 AbstractCegarLoop]: Abstraction has 73641 states and 327246 transitions. [2021-03-10 21:10:24,036 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.444444444444445) internal successors, (40), 8 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:24,036 INFO L276 IsEmpty]: Start isEmpty. Operand 73641 states and 327246 transitions. [2021-03-10 21:10:24,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:24,166 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:24,166 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:24,366 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-10 21:10:24,367 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:24,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:24,367 INFO L82 PathProgramCache]: Analyzing trace with hash 1703357382, now seen corresponding path program 18 times [2021-03-10 21:10:24,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:24,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513670777] [2021-03-10 21:10:24,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:24,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:24,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:24,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513670777] [2021-03-10 21:10:24,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251633796] [2021-03-10 21:10:24,404 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:24,430 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:10:24,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:24,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:10:24,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:24,516 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:24,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:24,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-03-10 21:10:24,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719032701] [2021-03-10 21:10:24,517 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:10:24,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:24,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:10:24,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:24,517 INFO L87 Difference]: Start difference. First operand 73641 states and 327246 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-03-10 21:10:26,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:26,026 INFO L93 Difference]: Finished difference Result 110472 states and 475652 transitions. [2021-03-10 21:10:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 21:10:26,027 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 30 [2021-03-10 21:10:26,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:26,456 INFO L225 Difference]: With dead ends: 110472 [2021-03-10 21:10:26,456 INFO L226 Difference]: Without dead ends: 109255 [2021-03-10 21:10:26,457 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 271.4ms TimeCoverageRelationStatistics Valid=233, Invalid=637, Unknown=0, NotChecked=0, Total=870 [2021-03-10 21:10:26,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109255 states. [2021-03-10 21:10:28,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109255 to 69009. [2021-03-10 21:10:28,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69009 states, 69008 states have (on average 4.380405170415024) internal successors, (302283), 69008 states have internal predecessors, (302283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:28,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69009 states to 69009 states and 302283 transitions. [2021-03-10 21:10:28,983 INFO L78 Accepts]: Start accepts. Automaton has 69009 states and 302283 transitions. Word has length 30 [2021-03-10 21:10:28,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:28,984 INFO L480 AbstractCegarLoop]: Abstraction has 69009 states and 302283 transitions. [2021-03-10 21:10:28,984 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-03-10 21:10:28,984 INFO L276 IsEmpty]: Start isEmpty. Operand 69009 states and 302283 transitions. [2021-03-10 21:10:29,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:29,114 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:29,114 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:29,315 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:29,315 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:29,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:29,315 INFO L82 PathProgramCache]: Analyzing trace with hash -1262024518, now seen corresponding path program 19 times [2021-03-10 21:10:29,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:29,315 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049226222] [2021-03-10 21:10:29,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:29,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:29,367 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:29,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049226222] [2021-03-10 21:10:29,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759452139] [2021-03-10 21:10:29,367 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:29,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:29,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:10:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:29,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:29,543 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:29,543 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-03-10 21:10:29,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1215866554] [2021-03-10 21:10:29,543 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:10:29,543 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:29,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:10:29,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:10:29,543 INFO L87 Difference]: Start difference. First operand 69009 states and 302283 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2021-03-10 21:10:32,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:32,347 INFO L93 Difference]: Finished difference Result 114617 states and 474975 transitions. [2021-03-10 21:10:32,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 21:10:32,347 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 30 [2021-03-10 21:10:32,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:32,742 INFO L225 Difference]: With dead ends: 114617 [2021-03-10 21:10:32,743 INFO L226 Difference]: Without dead ends: 113809 [2021-03-10 21:10:32,743 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1144 ImplicationChecksByTransitivity, 948.5ms TimeCoverageRelationStatistics Valid=795, Invalid=2865, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 21:10:32,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113809 states. [2021-03-10 21:10:35,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113809 to 82190. [2021-03-10 21:10:35,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82190 states, 82189 states have (on average 4.4068062636119185) internal successors, (362191), 82189 states have internal predecessors, (362191), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82190 states to 82190 states and 362191 transitions. [2021-03-10 21:10:35,471 INFO L78 Accepts]: Start accepts. Automaton has 82190 states and 362191 transitions. Word has length 30 [2021-03-10 21:10:35,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:35,471 INFO L480 AbstractCegarLoop]: Abstraction has 82190 states and 362191 transitions. [2021-03-10 21:10:35,471 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2021-03-10 21:10:35,472 INFO L276 IsEmpty]: Start isEmpty. Operand 82190 states and 362191 transitions. [2021-03-10 21:10:35,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:35,614 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:35,614 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:35,829 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-03-10 21:10:35,829 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:35,829 INFO L82 PathProgramCache]: Analyzing trace with hash -1475840896, now seen corresponding path program 20 times [2021-03-10 21:10:35,829 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:35,829 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489812558] [2021-03-10 21:10:35,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:36,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:36,255 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:36,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489812558] [2021-03-10 21:10:36,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274280913] [2021-03-10 21:10:36,255 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:10:36,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:10:36,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:36,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:10:36,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:36,425 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:36,425 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:36,425 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-10 21:10:36,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083144447] [2021-03-10 21:10:36,426 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:10:36,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:36,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:10:36,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:10:36,426 INFO L87 Difference]: Start difference. First operand 82190 states and 362191 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:37,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:37,446 INFO L93 Difference]: Finished difference Result 112585 states and 491661 transitions. [2021-03-10 21:10:37,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 21:10:37,447 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:10:37,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:38,280 INFO L225 Difference]: With dead ends: 112585 [2021-03-10 21:10:38,281 INFO L226 Difference]: Without dead ends: 112531 [2021-03-10 21:10:38,281 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 179.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-03-10 21:10:38,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112531 states. [2021-03-10 21:10:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112531 to 83030. [2021-03-10 21:10:40,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83030 states, 83029 states have (on average 4.397198569174626) internal successors, (365095), 83029 states have internal predecessors, (365095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:40,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83030 states to 83030 states and 365095 transitions. [2021-03-10 21:10:40,839 INFO L78 Accepts]: Start accepts. Automaton has 83030 states and 365095 transitions. Word has length 30 [2021-03-10 21:10:40,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:40,839 INFO L480 AbstractCegarLoop]: Abstraction has 83030 states and 365095 transitions. [2021-03-10 21:10:40,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:40,839 INFO L276 IsEmpty]: Start isEmpty. Operand 83030 states and 365095 transitions. [2021-03-10 21:10:41,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:41,002 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:41,002 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:41,203 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-03-10 21:10:41,203 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:41,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:41,203 INFO L82 PathProgramCache]: Analyzing trace with hash 1741080826, now seen corresponding path program 21 times [2021-03-10 21:10:41,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:41,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103372119] [2021-03-10 21:10:41,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:41,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:41,242 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:41,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103372119] [2021-03-10 21:10:41,242 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197260789] [2021-03-10 21:10:41,242 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:41,263 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 21:10:41,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:41,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:10:41,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:10:41,318 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:41,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:41,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 9 [2021-03-10 21:10:41,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056850638] [2021-03-10 21:10:41,319 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 21:10:41,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:41,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 21:10:41,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-03-10 21:10:41,320 INFO L87 Difference]: Start difference. First operand 83030 states and 365095 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:42,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:42,710 INFO L93 Difference]: Finished difference Result 117228 states and 510733 transitions. [2021-03-10 21:10:42,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 21:10:42,710 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:10:42,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:43,134 INFO L225 Difference]: With dead ends: 117228 [2021-03-10 21:10:43,134 INFO L226 Difference]: Without dead ends: 117184 [2021-03-10 21:10:43,134 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 106.7ms TimeCoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2021-03-10 21:10:43,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117184 states. [2021-03-10 21:10:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117184 to 83431. [2021-03-10 21:10:45,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83431 states, 83430 states have (on average 4.39896919573295) internal successors, (367006), 83430 states have internal predecessors, (367006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:45,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83431 states to 83431 states and 367006 transitions. [2021-03-10 21:10:45,839 INFO L78 Accepts]: Start accepts. Automaton has 83431 states and 367006 transitions. Word has length 30 [2021-03-10 21:10:45,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:45,839 INFO L480 AbstractCegarLoop]: Abstraction has 83431 states and 367006 transitions. [2021-03-10 21:10:45,839 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:45,840 INFO L276 IsEmpty]: Start isEmpty. Operand 83431 states and 367006 transitions. [2021-03-10 21:10:45,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:45,982 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:45,982 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:46,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-03-10 21:10:46,183 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:46,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:46,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1257322144, now seen corresponding path program 22 times [2021-03-10 21:10:46,183 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:46,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549590114] [2021-03-10 21:10:46,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:46,224 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:46,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549590114] [2021-03-10 21:10:46,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170946947] [2021-03-10 21:10:46,225 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:10:46,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:10:46,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:46,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:10:46,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:46,407 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:46,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:46,407 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-03-10 21:10:46,407 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055232006] [2021-03-10 21:10:46,407 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:10:46,407 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:46,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:10:46,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:10:46,408 INFO L87 Difference]: Start difference. First operand 83431 states and 367006 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2021-03-10 21:10:48,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:48,950 INFO L93 Difference]: Finished difference Result 149196 states and 613498 transitions. [2021-03-10 21:10:48,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 21:10:48,950 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 30 [2021-03-10 21:10:48,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:49,830 INFO L225 Difference]: With dead ends: 149196 [2021-03-10 21:10:49,831 INFO L226 Difference]: Without dead ends: 148112 [2021-03-10 21:10:49,831 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 920.8ms TimeCoverageRelationStatistics Valid=963, Invalid=3459, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 21:10:50,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148112 states. [2021-03-10 21:10:52,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148112 to 83378. [2021-03-10 21:10:52,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83378 states, 83377 states have (on average 4.3968480516209505) internal successors, (366596), 83377 states have internal predecessors, (366596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:52,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83378 states to 83378 states and 366596 transitions. [2021-03-10 21:10:52,905 INFO L78 Accepts]: Start accepts. Automaton has 83378 states and 366596 transitions. Word has length 30 [2021-03-10 21:10:52,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:10:52,905 INFO L480 AbstractCegarLoop]: Abstraction has 83378 states and 366596 transitions. [2021-03-10 21:10:52,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2021-03-10 21:10:52,906 INFO L276 IsEmpty]: Start isEmpty. Operand 83378 states and 366596 transitions. [2021-03-10 21:10:53,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:10:53,056 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:10:53,056 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:10:53,256 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-03-10 21:10:53,257 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:10:53,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:10:53,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1838310974, now seen corresponding path program 23 times [2021-03-10 21:10:53,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:10:53,257 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966324379] [2021-03-10 21:10:53,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:10:53,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:10:53,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:10:53,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966324379] [2021-03-10 21:10:53,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716425069] [2021-03-10 21:10:53,292 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:10:53,321 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 21:10:53,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:10:53,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:10:53,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:10:53,404 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:10:53,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:10:53,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2021-03-10 21:10:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456580709] [2021-03-10 21:10:53,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-03-10 21:10:53,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:10:53,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-03-10 21:10:53,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-03-10 21:10:53,405 INFO L87 Difference]: Start difference. First operand 83378 states and 366596 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:10:55,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:10:55,123 INFO L93 Difference]: Finished difference Result 144766 states and 629700 transitions. [2021-03-10 21:10:55,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-03-10 21:10:55,125 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:10:55,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:10:56,169 INFO L225 Difference]: With dead ends: 144766 [2021-03-10 21:10:56,169 INFO L226 Difference]: Without dead ends: 144766 [2021-03-10 21:10:56,170 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 221.1ms TimeCoverageRelationStatistics Valid=171, Invalid=381, Unknown=0, NotChecked=0, Total=552 [2021-03-10 21:10:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144766 states. [2021-03-10 21:10:59,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144766 to 118332. [2021-03-10 21:10:59,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118332 states, 118331 states have (on average 4.454800517193297) internal successors, (527141), 118331 states have internal predecessors, (527141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:00,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118332 states to 118332 states and 527141 transitions. [2021-03-10 21:11:00,461 INFO L78 Accepts]: Start accepts. Automaton has 118332 states and 527141 transitions. Word has length 30 [2021-03-10 21:11:00,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:00,461 INFO L480 AbstractCegarLoop]: Abstraction has 118332 states and 527141 transitions. [2021-03-10 21:11:00,461 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 10 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 118332 states and 527141 transitions. [2021-03-10 21:11:00,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:11:00,640 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:00,640 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:00,854 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:00,854 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:00,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:00,855 INFO L82 PathProgramCache]: Analyzing trace with hash -755076604, now seen corresponding path program 24 times [2021-03-10 21:11:00,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:00,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991919550] [2021-03-10 21:11:00,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:00,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:00,884 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:00,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991919550] [2021-03-10 21:11:00,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [614120291] [2021-03-10 21:11:00,884 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:00,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 21:11:00,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:00,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:11:00,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:01,006 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:11:01,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:01,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-03-10 21:11:01,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454256789] [2021-03-10 21:11:01,007 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:11:01,007 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:01,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:11:01,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:11:01,007 INFO L87 Difference]: Start difference. First operand 118332 states and 527141 transitions. Second operand has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-03-10 21:11:03,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:03,358 INFO L93 Difference]: Finished difference Result 216246 states and 959920 transitions. [2021-03-10 21:11:03,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 21:11:03,358 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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 30 [2021-03-10 21:11:03,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:04,719 INFO L225 Difference]: With dead ends: 216246 [2021-03-10 21:11:04,719 INFO L226 Difference]: Without dead ends: 215562 [2021-03-10 21:11:04,719 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 316.7ms TimeCoverageRelationStatistics Valid=293, Invalid=897, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 21:11:04,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215562 states. [2021-03-10 21:11:09,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215562 to 180990. [2021-03-10 21:11:09,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180990 states, 180989 states have (on average 4.464989585002403) internal successors, (808114), 180989 states have internal predecessors, (808114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:11,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180990 states to 180990 states and 808114 transitions. [2021-03-10 21:11:11,019 INFO L78 Accepts]: Start accepts. Automaton has 180990 states and 808114 transitions. Word has length 30 [2021-03-10 21:11:11,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:11,019 INFO L480 AbstractCegarLoop]: Abstraction has 180990 states and 808114 transitions. [2021-03-10 21:11:11,019 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.538461538461538) internal successors, (59), 12 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) [2021-03-10 21:11:11,019 INFO L276 IsEmpty]: Start isEmpty. Operand 180990 states and 808114 transitions. [2021-03-10 21:11:11,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:11:11,288 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:11,288 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:11,488 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-03-10 21:11:11,489 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:11,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:11,489 INFO L82 PathProgramCache]: Analyzing trace with hash 1382842200, now seen corresponding path program 25 times [2021-03-10 21:11:11,489 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:11,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644661237] [2021-03-10 21:11:11,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:11,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:11,531 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:11,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644661237] [2021-03-10 21:11:11,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [880258101] [2021-03-10 21:11:11,531 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:11,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:11,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:11:11,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:11,735 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:11,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:11,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 11] total 17 [2021-03-10 21:11:11,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590476166] [2021-03-10 21:11:11,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 21:11:11,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:11,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 21:11:11,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-03-10 21:11:11,736 INFO L87 Difference]: Start difference. First operand 180990 states and 808114 transitions. Second operand has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2021-03-10 21:11:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:15,380 INFO L93 Difference]: Finished difference Result 321885 states and 1404805 transitions. [2021-03-10 21:11:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:11:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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 30 [2021-03-10 21:11:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:16,662 INFO L225 Difference]: With dead ends: 321885 [2021-03-10 21:11:16,662 INFO L226 Difference]: Without dead ends: 321525 [2021-03-10 21:11:16,662 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 549 ImplicationChecksByTransitivity, 580.7ms TimeCoverageRelationStatistics Valid=474, Invalid=1596, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 21:11:17,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321525 states. [2021-03-10 21:11:23,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321525 to 208992. [2021-03-10 21:11:23,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208992 states, 208991 states have (on average 4.460924154628668) internal successors, (932293), 208991 states have internal predecessors, (932293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:25,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208992 states to 208992 states and 932293 transitions. [2021-03-10 21:11:25,252 INFO L78 Accepts]: Start accepts. Automaton has 208992 states and 932293 transitions. Word has length 30 [2021-03-10 21:11:25,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:25,252 INFO L480 AbstractCegarLoop]: Abstraction has 208992 states and 932293 transitions. [2021-03-10 21:11:25,252 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 17 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) [2021-03-10 21:11:25,252 INFO L276 IsEmpty]: Start isEmpty. Operand 208992 states and 932293 transitions. [2021-03-10 21:11:25,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:11:25,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:25,517 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:25,717 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:25,718 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:25,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:25,718 INFO L82 PathProgramCache]: Analyzing trace with hash 989839330, now seen corresponding path program 26 times [2021-03-10 21:11:25,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:25,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020004859] [2021-03-10 21:11:25,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:25,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:25,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:25,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020004859] [2021-03-10 21:11:25,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911540216] [2021-03-10 21:11:25,759 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:25,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:11:25,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:25,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:11:25,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:25,903 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:25,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:25,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:11:25,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614090095] [2021-03-10 21:11:25,904 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:11:25,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:25,904 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:11:25,904 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:25,904 INFO L87 Difference]: Start difference. First operand 208992 states and 932293 transitions. Second operand has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:30,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:30,554 INFO L93 Difference]: Finished difference Result 449028 states and 1992282 transitions. [2021-03-10 21:11:30,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-03-10 21:11:30,555 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:11:30,555 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:32,423 INFO L225 Difference]: With dead ends: 449028 [2021-03-10 21:11:32,423 INFO L226 Difference]: Without dead ends: 448928 [2021-03-10 21:11:32,423 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 246.9ms TimeCoverageRelationStatistics Valid=203, Invalid=499, Unknown=0, NotChecked=0, Total=702 [2021-03-10 21:11:33,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448928 states. [2021-03-10 21:11:43,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448928 to 335163. [2021-03-10 21:11:43,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335163 states, 335162 states have (on average 4.500501250141722) internal successors, (1508397), 335162 states have internal predecessors, (1508397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:45,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335163 states to 335163 states and 1508397 transitions. [2021-03-10 21:11:45,711 INFO L78 Accepts]: Start accepts. Automaton has 335163 states and 1508397 transitions. Word has length 30 [2021-03-10 21:11:45,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:11:45,711 INFO L480 AbstractCegarLoop]: Abstraction has 335163 states and 1508397 transitions. [2021-03-10 21:11:45,711 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.1333333333333333) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:11:45,711 INFO L276 IsEmpty]: Start isEmpty. Operand 335163 states and 1508397 transitions. [2021-03-10 21:11:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:11:46,063 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:11:46,063 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:11:46,263 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:46,264 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:11:46,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:11:46,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1248634654, now seen corresponding path program 27 times [2021-03-10 21:11:46,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:11:46,264 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024015499] [2021-03-10 21:11:46,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:11:46,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:11:46,300 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:46,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024015499] [2021-03-10 21:11:46,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246330297] [2021-03-10 21:11:46,300 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:11:46,321 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 21:11:46,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:11:46,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-03-10 21:11:46,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:11:46,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-03-10 21:11:46,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 21:11:46,433 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 21:11:46,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 21:11:46,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-03-10 21:11:46,457 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:11:46,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:11:46,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:11:46,457 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252780107] [2021-03-10 21:11:46,457 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:11:46,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:11:46,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:11:46,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:11:46,458 INFO L87 Difference]: Start difference. First operand 335163 states and 1508397 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-03-10 21:11:47,458 WARN L205 SmtUtils]: Spent 448.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 17 [2021-03-10 21:11:51,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:11:51,437 INFO L93 Difference]: Finished difference Result 420807 states and 1870593 transitions. [2021-03-10 21:11:51,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 21:11:51,438 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-03-10 21:11:51,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:11:53,851 INFO L225 Difference]: With dead ends: 420807 [2021-03-10 21:11:53,851 INFO L226 Difference]: Without dead ends: 420231 [2021-03-10 21:11:53,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 945.2ms TimeCoverageRelationStatistics Valid=259, Invalid=1381, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 21:11:54,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 420231 states. [2021-03-10 21:12:02,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 420231 to 348832. [2021-03-10 21:12:03,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348832 states, 348831 states have (on average 4.4973124521616485) internal successors, (1568802), 348831 states have internal predecessors, (1568802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:06,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348832 states to 348832 states and 1568802 transitions. [2021-03-10 21:12:06,877 INFO L78 Accepts]: Start accepts. Automaton has 348832 states and 1568802 transitions. Word has length 30 [2021-03-10 21:12:06,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:06,877 INFO L480 AbstractCegarLoop]: Abstraction has 348832 states and 1568802 transitions. [2021-03-10 21:12:06,877 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-03-10 21:12:06,877 INFO L276 IsEmpty]: Start isEmpty. Operand 348832 states and 1568802 transitions. [2021-03-10 21:12:07,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:12:07,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:07,432 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:07,651 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-03-10 21:12:07,651 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:07,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:07,653 INFO L82 PathProgramCache]: Analyzing trace with hash -1710348488, now seen corresponding path program 28 times [2021-03-10 21:12:07,653 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:07,653 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453014469] [2021-03-10 21:12:07,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:07,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:07,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453014469] [2021-03-10 21:12:07,718 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [31782908] [2021-03-10 21:12:07,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 21:12:07,783 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 21:12:07,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:07,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 21:12:07,784 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:07,942 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:07,942 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:07,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 10] total 15 [2021-03-10 21:12:07,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640417978] [2021-03-10 21:12:07,943 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 21:12:07,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:07,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 21:12:07,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2021-03-10 21:12:07,943 INFO L87 Difference]: Start difference. First operand 348832 states and 1568802 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-03-10 21:12:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:15,085 INFO L93 Difference]: Finished difference Result 594471 states and 2624623 transitions. [2021-03-10 21:12:15,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 21:12:15,085 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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 30 [2021-03-10 21:12:15,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:18,859 INFO L225 Difference]: With dead ends: 594471 [2021-03-10 21:12:18,859 INFO L226 Difference]: Without dead ends: 594099 [2021-03-10 21:12:18,860 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 358 ImplicationChecksByTransitivity, 439.1ms TimeCoverageRelationStatistics Valid=349, Invalid=1133, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 21:12:20,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594099 states. [2021-03-10 21:12:31,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594099 to 349022. [2021-03-10 21:12:31,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349022 states, 349021 states have (on average 4.49863188747955) internal successors, (1570117), 349021 states have internal predecessors, (1570117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:12:34,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349022 states to 349022 states and 1570117 transitions. [2021-03-10 21:12:34,508 INFO L78 Accepts]: Start accepts. Automaton has 349022 states and 1570117 transitions. Word has length 30 [2021-03-10 21:12:34,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:12:34,508 INFO L480 AbstractCegarLoop]: Abstraction has 349022 states and 1570117 transitions. [2021-03-10 21:12:34,508 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 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) [2021-03-10 21:12:34,508 INFO L276 IsEmpty]: Start isEmpty. Operand 349022 states and 1570117 transitions. [2021-03-10 21:12:34,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:12:34,867 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:12:34,867 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:12:35,079 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:35,079 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:12:35,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:12:35,079 INFO L82 PathProgramCache]: Analyzing trace with hash 1447640776, now seen corresponding path program 29 times [2021-03-10 21:12:35,079 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:12:35,080 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291890682] [2021-03-10 21:12:35,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:12:35,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:12:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:12:35,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291890682] [2021-03-10 21:12:35,121 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579254255] [2021-03-10 21:12:35,121 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:12:35,140 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 21:12:35,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:12:35,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:12:35,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:12:35,261 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:12:35,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:12:35,261 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:12:35,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929349166] [2021-03-10 21:12:35,262 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:12:35,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:12:35,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:12:35,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:12:35,263 INFO L87 Difference]: Start difference. First operand 349022 states and 1570117 transitions. Second operand has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-03-10 21:12:42,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:12:42,493 INFO L93 Difference]: Finished difference Result 645824 states and 2873438 transitions. [2021-03-10 21:12:42,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 21:12:42,494 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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 30 [2021-03-10 21:12:42,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:12:46,904 INFO L225 Difference]: With dead ends: 645824 [2021-03-10 21:12:46,904 INFO L226 Difference]: Without dead ends: 641909 [2021-03-10 21:12:46,904 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=446, Invalid=1276, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:12:48,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641909 states. [2021-03-10 21:12:59,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641909 to 384160. [2021-03-10 21:12:59,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384160 states, 384159 states have (on average 4.503450394237802) internal successors, (1730041), 384159 states have internal predecessors, (1730041), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:03,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384160 states to 384160 states and 1730041 transitions. [2021-03-10 21:13:03,124 INFO L78 Accepts]: Start accepts. Automaton has 384160 states and 1730041 transitions. Word has length 30 [2021-03-10 21:13:03,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:03,124 INFO L480 AbstractCegarLoop]: Abstraction has 384160 states and 1730041 transitions. [2021-03-10 21:13:03,124 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.214285714285714) internal successors, (59), 13 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) [2021-03-10 21:13:03,125 INFO L276 IsEmpty]: Start isEmpty. Operand 384160 states and 1730041 transitions. [2021-03-10 21:13:03,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:13:03,513 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:03,513 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:03,713 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-03-10 21:13:03,714 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:03,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:03,714 INFO L82 PathProgramCache]: Analyzing trace with hash -1201227792, now seen corresponding path program 30 times [2021-03-10 21:13:03,714 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:03,714 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966953165] [2021-03-10 21:13:03,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:03,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:03,759 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:03,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966953165] [2021-03-10 21:13:03,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164731484] [2021-03-10 21:13:03,760 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:03,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 21:13:03,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:13:03,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:13:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:03,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:03,880 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-10 21:13:03,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359368908] [2021-03-10 21:13:03,880 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:03,880 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:03,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:03,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:03,880 INFO L87 Difference]: Start difference. First operand 384160 states and 1730041 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:11,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:11,377 INFO L93 Difference]: Finished difference Result 701660 states and 3107687 transitions. [2021-03-10 21:13:11,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:13:11,378 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:13:11,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:15,095 INFO L225 Difference]: With dead ends: 701660 [2021-03-10 21:13:15,095 INFO L226 Difference]: Without dead ends: 701660 [2021-03-10 21:13:15,095 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:13:16,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 701660 states. [2021-03-10 21:13:32,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 701660 to 549307. [2021-03-10 21:13:33,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 549307 states, 549306 states have (on average 4.520549566179871) internal successors, (2483165), 549306 states have internal predecessors, (2483165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:38,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 549307 states to 549307 states and 2483165 transitions. [2021-03-10 21:13:38,800 INFO L78 Accepts]: Start accepts. Automaton has 549307 states and 2483165 transitions. Word has length 30 [2021-03-10 21:13:38,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:13:38,800 INFO L480 AbstractCegarLoop]: Abstraction has 549307 states and 2483165 transitions. [2021-03-10 21:13:38,800 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:38,800 INFO L276 IsEmpty]: Start isEmpty. Operand 549307 states and 2483165 transitions. [2021-03-10 21:13:40,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:13:40,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:13:40,068 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:13:40,279 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 21:13:40,279 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:13:40,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:13:40,279 INFO L82 PathProgramCache]: Analyzing trace with hash 1407643986, now seen corresponding path program 31 times [2021-03-10 21:13:40,279 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:13:40,280 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685635756] [2021-03-10 21:13:40,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:13:40,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:40,346 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685635756] [2021-03-10 21:13:40,347 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405371598] [2021-03-10 21:13:40,347 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:13:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:13:40,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-03-10 21:13:40,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:13:40,482 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:13:40,482 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:13:40,482 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-03-10 21:13:40,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869106885] [2021-03-10 21:13:40,483 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 21:13:40,483 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:13:40,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 21:13:40,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-03-10 21:13:40,483 INFO L87 Difference]: Start difference. First operand 549307 states and 2483165 transitions. Second operand has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:13:50,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:13:50,926 INFO L93 Difference]: Finished difference Result 761881 states and 3367916 transitions. [2021-03-10 21:13:50,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 21:13:50,927 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 21:13:50,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:13:55,114 INFO L225 Difference]: With dead ends: 761881 [2021-03-10 21:13:55,114 INFO L226 Difference]: Without dead ends: 761881 [2021-03-10 21:13:55,114 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 487.4ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 21:13:56,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 761881 states. [2021-03-10 21:14:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 761881 to 546012. [2021-03-10 21:14:15,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546012 states, 546011 states have (on average 4.5314764720857275) internal successors, (2474236), 546011 states have internal predecessors, (2474236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546012 states to 546012 states and 2474236 transitions. [2021-03-10 21:14:19,253 INFO L78 Accepts]: Start accepts. Automaton has 546012 states and 2474236 transitions. Word has length 30 [2021-03-10 21:14:19,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:14:19,253 INFO L480 AbstractCegarLoop]: Abstraction has 546012 states and 2474236 transitions. [2021-03-10 21:14:19,253 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.076923076923077) internal successors, (53), 12 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:14:19,253 INFO L276 IsEmpty]: Start isEmpty. Operand 546012 states and 2474236 transitions. [2021-03-10 21:14:19,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:14:19,700 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:14:19,701 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:14:19,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,915 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:14:19,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:14:19,915 INFO L82 PathProgramCache]: Analyzing trace with hash 1625498796, now seen corresponding path program 32 times [2021-03-10 21:14:19,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:14:19,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117095610] [2021-03-10 21:14:19,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:14:19,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:14:19,955 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:14:19,955 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117095610] [2021-03-10 21:14:19,956 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743871517] [2021-03-10 21:14:19,957 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:14:19,979 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 21:14:19,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:14:19,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:14:19,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:14:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 21:14:20,102 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:14:20,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-03-10 21:14:20,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683113582] [2021-03-10 21:14:20,102 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 21:14:20,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:14:20,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 21:14:20,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-03-10 21:14:20,103 INFO L87 Difference]: Start difference. First operand 546012 states and 2474236 transitions. Second operand has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-03-10 21:14:34,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 21:14:34,946 INFO L93 Difference]: Finished difference Result 1173878 states and 5267560 transitions. [2021-03-10 21:14:34,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 21:14:34,947 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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 30 [2021-03-10 21:14:34,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 21:14:44,270 INFO L225 Difference]: With dead ends: 1173878 [2021-03-10 21:14:44,270 INFO L226 Difference]: Without dead ends: 1168937 [2021-03-10 21:14:44,283 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1230.6ms TimeCoverageRelationStatistics Valid=1330, Invalid=5810, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 21:14:46,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1168937 states. [2021-03-10 21:15:18,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1168937 to 823926. [2021-03-10 21:15:19,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 823926 states, 823925 states have (on average 4.549131292289953) internal successors, (3748143), 823925 states have internal predecessors, (3748143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 21:15:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 823926 states to 823926 states and 3748143 transitions. [2021-03-10 21:15:27,858 INFO L78 Accepts]: Start accepts. Automaton has 823926 states and 3748143 transitions. Word has length 30 [2021-03-10 21:15:27,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 21:15:27,858 INFO L480 AbstractCegarLoop]: Abstraction has 823926 states and 3748143 transitions. [2021-03-10 21:15:27,858 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.933333333333333) internal successors, (59), 14 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) [2021-03-10 21:15:27,858 INFO L276 IsEmpty]: Start isEmpty. Operand 823926 states and 3748143 transitions. [2021-03-10 21:15:28,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 21:15:28,683 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 21:15:28,683 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 21:15:28,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:28,896 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 21:15:28,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 21:15:28,899 INFO L82 PathProgramCache]: Analyzing trace with hash -154432502, now seen corresponding path program 33 times [2021-03-10 21:15:28,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 21:15:28,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555821744] [2021-03-10 21:15:28,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 21:15:28,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 21:15:28,977 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 21:15:28,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555821744] [2021-03-10 21:15:28,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494188381] [2021-03-10 21:15:28,978 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 21:15:29,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 21:15:29,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 21:15:29,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 21:15:29,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 21:15:29,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-03-10 21:15:29,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 21:15:29,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-03-10 21:15:29,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [153330574] [2021-03-10 21:15:29,716 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 21:15:29,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 21:15:29,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 21:15:29,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-03-10 21:15:29,716 INFO L87 Difference]: Start difference. First operand 823926 states and 3748143 transitions. Second operand has 14 states, 14 states have (on average 4.0) internal successors, (56), 13 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)