/usr/bin/java -Xmx8000000000 -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-a47a088281b0b97d17910950432b7c5b5bc3adeb-a47a088 [2021-07-13 19:11:33,215 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-07-13 19:11:33,216 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-07-13 19:11:33,256 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-07-13 19:11:33,281 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 [2021-07-13 19:11:33,296 INFO L113 SettingsManager]: Loading preferences was successful [2021-07-13 19:11:33,296 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-07-13 19:11:33,296 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-07-13 19:11:33,297 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-07-13 19:11:33,297 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-07-13 19:11:33,297 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * Use SBE=true [2021-07-13 19:11:33,298 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * sizeof long=4 [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-07-13 19:11:33,298 INFO L138 SettingsManager]: * sizeof long double=12 [2021-07-13 19:11:33,299 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-07-13 19:11:33,299 INFO L138 SettingsManager]: * Use constant arrays=true [2021-07-13 19:11:33,299 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-07-13 19:11:33,299 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-07-13 19:11:33,299 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-07-13 19:11:33,299 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-07-13 19:11:33,299 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-07-13 19:11:33,299 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-07-13 19:11:33,299 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-07-13 19:11:33,299 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-07-13 19:11:33,300 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-07-13 19:11:33,300 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-07-13 19:11:33,300 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-07-13 19:11:33,300 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-07-13 19:11:33,300 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-07-13 19:11:33,300 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-07-13 19:11:33,553 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-07-13 19:11:33,569 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-07-13 19:11:33,571 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-07-13 19:11:33,572 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-07-13 19:11:33,573 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-07-13 19:11:33,574 INFO L432 ainManager$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 [2021-07-13 19:11:33,574 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/array-eq-trans.wvr.bpl' [2021-07-13 19:11:33,596 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-07-13 19:11:33,598 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-07-13 19:11:33,598 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-07-13 19:11:33,599 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-07-13 19:11:33,599 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-07-13 19:11:33,608 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,615 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,622 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-07-13 19:11:33,623 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-07-13 19:11:33,623 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-07-13 19:11:33,624 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-07-13 19:11:33,630 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,630 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,639 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,639 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,645 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,650 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,651 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 13.07 07:11:33" (1/1) ... [2021-07-13 19:11:33,655 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-07-13 19:11:33,656 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-07-13 19:11:33,656 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-07-13 19:11:33,656 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-07-13 19:11:33,658 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:33" (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 [2021-07-13 19:11:33,734 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-07-13 19:11:33,734 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-07-13 19:11:33,734 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-07-13 19:11:33,734 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-07-13 19:11:33,735 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-07-13 19:11:33,735 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-07-13 19:11:33,735 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-07-13 19:11:33,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-07-13 19:11:33,736 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-07-13 19:11:33,736 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-07-13 19:11:33,736 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-07-13 19:11:33,737 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-07-13 19:11:33,738 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-07-13 19:11:33,905 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-07-13 19:11:33,905 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-07-13 19:11:33,906 INFO L202 PluginConnector]: Adding new model array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.07 07:11:33 BoogieIcfgContainer [2021-07-13 19:11:33,907 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-07-13 19:11:33,908 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-07-13 19:11:33,908 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-07-13 19:11:33,909 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-07-13 19:11:33,910 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 13.07 07:11:33" (1/2) ... [2021-07-13 19:11:33,910 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46eab9d9 and model type array-eq-trans.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.07 07:11:33, skipping insertion in model container [2021-07-13 19:11:33,910 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 13.07 07:11:33" (2/2) ... [2021-07-13 19:11:33,911 INFO L111 eAbstractionObserver]: Analyzing ICFG array-eq-trans.wvr.bpl [2021-07-13 19:11:33,935 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-07-13 19:11:33,936 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-07-13 19:11:33,936 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-07-13 19:11:33,936 INFO L474 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-07-13 19:11:33,986 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-07-13 19:11:34,001 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-07-13 19:11:34,016 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-07-13 19:11:34,016 INFO L379 AbstractCegarLoop]: Hoare is false [2021-07-13 19:11:34,016 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-07-13 19:11:34,016 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-07-13 19:11:34,016 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-07-13 19:11:34,016 INFO L383 AbstractCegarLoop]: Difference is false [2021-07-13 19:11:34,016 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-07-13 19:11:34,017 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == ULTIMATE.start======== [2021-07-13 19:11:34,023 INFO L110 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 39 places, 35 transitions, 94 flow [2021-07-13 19:11:34,054 INFO L132 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,057 INFO L276 IsEmpty]: Start isEmpty. Operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:34,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-07-13 19:11:34,066 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:34,066 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:34,067 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:34,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:34,070 INFO L82 PathProgramCache]: Analyzing trace with hash -1022226388, now seen corresponding path program 1 times [2021-07-13 19:11:34,076 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:34,076 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058197761] [2021-07-13 19:11:34,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:34,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:34,273 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:34,274 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058197761] [2021-07-13 19:11:34,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058197761] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:34,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:34,276 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:11:34,276 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283396264] [2021-07-13 19:11:34,280 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:34,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:34,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:34,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:34,296 INFO L87 Difference]: Start difference. First operand has 305 states, 304 states have (on average 3.3782894736842106) internal successors, (1027), 304 states have internal predecessors, (1027), 0 states have call successors, (0), 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) [2021-07-13 19:11:34,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:34,504 INFO L93 Difference]: Finished difference Result 606 states and 2050 transitions. [2021-07-13 19:11:34,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-07-13 19:11:34,505 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 [2021-07-13 19:11:34,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:34,533 INFO L225 Difference]: With dead ends: 606 [2021-07-13 19:11:34,533 INFO L226 Difference]: Without dead ends: 591 [2021-07-13 19:11:34,534 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 93.8ms TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:11:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2021-07-13 19:11:34,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 406. [2021-07-13 19:11:34,612 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) [2021-07-13 19:11:34,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 1360 transitions. [2021-07-13 19:11:34,623 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 1360 transitions. Word has length 15 [2021-07-13 19:11:34,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:34,624 INFO L482 AbstractCegarLoop]: Abstraction has 406 states and 1360 transitions. [2021-07-13 19:11:34,624 INFO L483 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) [2021-07-13 19:11:34,624 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 1360 transitions. [2021-07-13 19:11:34,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:11:34,632 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:34,632 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:34,633 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-07-13 19:11:34,633 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:34,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:34,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1372690376, now seen corresponding path program 1 times [2021-07-13 19:11:34,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:34,637 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078975694] [2021-07-13 19:11:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:34,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,726 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:34,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:34,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078975694] [2021-07-13 19:11:34,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078975694] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:34,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384467962] [2021-07-13 19:11:34,727 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 [2021-07-13 19:11:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:34,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 6 conjunts are in the unsatisfiable core [2021-07-13 19:11:34,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:34,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384467962] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:34,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:34,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-07-13 19:11:34,962 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688674920] [2021-07-13 19:11:34,962 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:34,962 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:34,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:34,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:34,963 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) [2021-07-13 19:11:35,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:35,044 INFO L93 Difference]: Finished difference Result 1011 states and 3270 transitions. [2021-07-13 19:11:35,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:11:35,044 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 [2021-07-13 19:11:35,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:35,050 INFO L225 Difference]: With dead ends: 1011 [2021-07-13 19:11:35,050 INFO L226 Difference]: Without dead ends: 847 [2021-07-13 19:11:35,050 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 41.9ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:35,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 847 states. [2021-07-13 19:11:35,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 847 to 440. [2021-07-13 19:11:35,068 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) [2021-07-13 19:11:35,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 1475 transitions. [2021-07-13 19:11:35,070 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 1475 transitions. Word has length 18 [2021-07-13 19:11:35,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:35,071 INFO L482 AbstractCegarLoop]: Abstraction has 440 states and 1475 transitions. [2021-07-13 19:11:35,071 INFO L483 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) [2021-07-13 19:11:35,071 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 1475 transitions. [2021-07-13 19:11:35,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:11:35,072 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:35,072 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:35,284 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-07-13 19:11:35,284 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:35,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:35,285 INFO L82 PathProgramCache]: Analyzing trace with hash -910224837, now seen corresponding path program 1 times [2021-07-13 19:11:35,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:35,285 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708475039] [2021-07-13 19:11:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:35,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:35,519 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:35,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708475039] [2021-07-13 19:11:35,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708475039] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:35,520 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1423948739] [2021-07-13 19:11:35,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:35,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:35,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:35,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:35,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:35,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1423948739] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:35,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:35,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 19:11:35,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121519029] [2021-07-13 19:11:35,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:35,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:35,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:35,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:35,708 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) [2021-07-13 19:11:36,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:36,107 INFO L93 Difference]: Finished difference Result 1656 states and 5504 transitions. [2021-07-13 19:11:36,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:11:36,107 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 [2021-07-13 19:11:36,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:36,115 INFO L225 Difference]: With dead ends: 1656 [2021-07-13 19:11:36,115 INFO L226 Difference]: Without dead ends: 1415 [2021-07-13 19:11:36,115 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 302.3ms TimeCoverageRelationStatistics Valid=89, Invalid=217, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:11:36,117 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1415 states. [2021-07-13 19:11:36,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1415 to 637. [2021-07-13 19:11:36,135 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) [2021-07-13 19:11:36,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 637 states to 637 states and 2224 transitions. [2021-07-13 19:11:36,137 INFO L78 Accepts]: Start accepts. Automaton has 637 states and 2224 transitions. Word has length 18 [2021-07-13 19:11:36,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:36,137 INFO L482 AbstractCegarLoop]: Abstraction has 637 states and 2224 transitions. [2021-07-13 19:11:36,138 INFO L483 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) [2021-07-13 19:11:36,138 INFO L276 IsEmpty]: Start isEmpty. Operand 637 states and 2224 transitions. [2021-07-13 19:11:36,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:11:36,139 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:36,139 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:36,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:36,356 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:36,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1302877552, now seen corresponding path program 1 times [2021-07-13 19:11:36,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:36,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137135824] [2021-07-13 19:11:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:36,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:36,438 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:36,438 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137135824] [2021-07-13 19:11:36,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137135824] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:36,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:36,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:11:36,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818293252] [2021-07-13 19:11:36,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:36,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:36,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:36,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:36,439 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) [2021-07-13 19:11:36,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:36,524 INFO L93 Difference]: Finished difference Result 1343 states and 4620 transitions. [2021-07-13 19:11:36,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:36,524 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 [2021-07-13 19:11:36,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:36,530 INFO L225 Difference]: With dead ends: 1343 [2021-07-13 19:11:36,530 INFO L226 Difference]: Without dead ends: 1119 [2021-07-13 19:11:36,530 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 36.7ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:36,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1119 states. [2021-07-13 19:11:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1119 to 792. [2021-07-13 19:11:36,549 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) [2021-07-13 19:11:36,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 2755 transitions. [2021-07-13 19:11:36,552 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 2755 transitions. Word has length 18 [2021-07-13 19:11:36,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:36,553 INFO L482 AbstractCegarLoop]: Abstraction has 792 states and 2755 transitions. [2021-07-13 19:11:36,553 INFO L483 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) [2021-07-13 19:11:36,553 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 2755 transitions. [2021-07-13 19:11:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:11:36,555 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:36,555 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:36,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-07-13 19:11:36,555 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:36,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:36,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1936831982, now seen corresponding path program 2 times [2021-07-13 19:11:36,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:36,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630599617] [2021-07-13 19:11:36,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:36,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:36,588 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:36,588 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:36,588 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630599617] [2021-07-13 19:11:36,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630599617] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:36,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:36,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:11:36,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770355068] [2021-07-13 19:11:36,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:36,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:36,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:36,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:36,589 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) [2021-07-13 19:11:36,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:36,683 INFO L93 Difference]: Finished difference Result 1367 states and 4635 transitions. [2021-07-13 19:11:36,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:36,683 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 [2021-07-13 19:11:36,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:36,689 INFO L225 Difference]: With dead ends: 1367 [2021-07-13 19:11:36,690 INFO L226 Difference]: Without dead ends: 1199 [2021-07-13 19:11:36,690 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:36,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1199 states. [2021-07-13 19:11:36,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1199 to 810. [2021-07-13 19:11:36,712 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) [2021-07-13 19:11:36,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 810 states to 810 states and 2796 transitions. [2021-07-13 19:11:36,715 INFO L78 Accepts]: Start accepts. Automaton has 810 states and 2796 transitions. Word has length 18 [2021-07-13 19:11:36,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:36,716 INFO L482 AbstractCegarLoop]: Abstraction has 810 states and 2796 transitions. [2021-07-13 19:11:36,716 INFO L483 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) [2021-07-13 19:11:36,716 INFO L276 IsEmpty]: Start isEmpty. Operand 810 states and 2796 transitions. [2021-07-13 19:11:36,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:11:36,718 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:36,718 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:36,718 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-07-13 19:11:36,719 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:36,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1545690414, now seen corresponding path program 2 times [2021-07-13 19:11:36,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:36,719 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113555961] [2021-07-13 19:11:36,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:36,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:36,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:36,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:36,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113555961] [2021-07-13 19:11:36,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113555961] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:36,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401171828] [2021-07-13 19:11:36,748 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 [2021-07-13 19:11:36,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:36,800 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:36,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:36,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:36,933 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:36,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [401171828] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:36,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:11:36,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-07-13 19:11:36,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519951388] [2021-07-13 19:11:36,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:36,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:36,937 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:36,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:36,937 INFO L87 Difference]: Start difference. First operand 810 states and 2796 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) [2021-07-13 19:11:37,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:37,081 INFO L93 Difference]: Finished difference Result 1377 states and 4559 transitions. [2021-07-13 19:11:37,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:11:37,082 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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 [2021-07-13 19:11:37,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:37,088 INFO L225 Difference]: With dead ends: 1377 [2021-07-13 19:11:37,088 INFO L226 Difference]: Without dead ends: 1220 [2021-07-13 19:11:37,088 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 135.4ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1220 states. [2021-07-13 19:11:37,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1220 to 804. [2021-07-13 19:11:37,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 804 states, 803 states have (on average 3.460772104607721) internal successors, (2779), 803 states have internal predecessors, (2779), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:37,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 804 states to 804 states and 2779 transitions. [2021-07-13 19:11:37,111 INFO L78 Accepts]: Start accepts. Automaton has 804 states and 2779 transitions. Word has length 18 [2021-07-13 19:11:37,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:37,111 INFO L482 AbstractCegarLoop]: Abstraction has 804 states and 2779 transitions. [2021-07-13 19:11:37,111 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) [2021-07-13 19:11:37,111 INFO L276 IsEmpty]: Start isEmpty. Operand 804 states and 2779 transitions. [2021-07-13 19:11:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:11:37,113 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:37,113 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:37,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:37,330 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:37,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:37,331 INFO L82 PathProgramCache]: Analyzing trace with hash -678642568, now seen corresponding path program 3 times [2021-07-13 19:11:37,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:37,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107676282] [2021-07-13 19:11:37,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:37,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:37,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:37,358 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:37,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107676282] [2021-07-13 19:11:37,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107676282] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:37,358 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109595062] [2021-07-13 19:11:37,358 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 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 [2021-07-13 19:11:37,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:11:37,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:37,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:37,393 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:37,491 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:37,491 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109595062] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:37,491 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-07-13 19:11:37,492 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [4] total 8 [2021-07-13 19:11:37,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159619417] [2021-07-13 19:11:37,492 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:11:37,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:37,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:11:37,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:37,493 INFO L87 Difference]: Start difference. First operand 804 states and 2779 transitions. Second operand has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) [2021-07-13 19:11:37,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:37,685 INFO L93 Difference]: Finished difference Result 1697 states and 5759 transitions. [2021-07-13 19:11:37,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:37,686 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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 [2021-07-13 19:11:37,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:37,693 INFO L225 Difference]: With dead ends: 1697 [2021-07-13 19:11:37,693 INFO L226 Difference]: Without dead ends: 1614 [2021-07-13 19:11:37,694 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 100.8ms TimeCoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:37,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1614 states. [2021-07-13 19:11:37,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1614 to 817. [2021-07-13 19:11:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 3.450980392156863) internal successors, (2816), 816 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:37,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 2816 transitions. [2021-07-13 19:11:37,718 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 2816 transitions. Word has length 18 [2021-07-13 19:11:37,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:37,719 INFO L482 AbstractCegarLoop]: Abstraction has 817 states and 2816 transitions. [2021-07-13 19:11:37,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 3.0) internal successors, (18), 5 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) [2021-07-13 19:11:37,719 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 2816 transitions. [2021-07-13 19:11:37,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-07-13 19:11:37,721 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:37,721 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:37,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:37,940 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:37,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:37,940 INFO L82 PathProgramCache]: Analyzing trace with hash -437071600, now seen corresponding path program 4 times [2021-07-13 19:11:37,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:37,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332337964] [2021-07-13 19:11:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:37,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:37,969 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:37,970 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:37,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332337964] [2021-07-13 19:11:37,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332337964] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:37,970 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725392943] [2021-07-13 19:11:37,970 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 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:37,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:37,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:37,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:11:37,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:38,082 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:38,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725392943] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:38,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 7 [2021-07-13 19:11:38,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191985018] [2021-07-13 19:11:38,083 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:38,083 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:38,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:38,083 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:38,084 INFO L87 Difference]: Start difference. First operand 817 states and 2816 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:38,214 INFO L93 Difference]: Finished difference Result 1418 states and 4750 transitions. [2021-07-13 19:11:38,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:38,214 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-07-13 19:11:38,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:38,219 INFO L225 Difference]: With dead ends: 1418 [2021-07-13 19:11:38,220 INFO L226 Difference]: Without dead ends: 1116 [2021-07-13 19:11:38,220 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 76.7ms TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:38,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1116 states. [2021-07-13 19:11:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1116 to 707. [2021-07-13 19:11:38,235 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) [2021-07-13 19:11:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 707 states to 707 states and 2448 transitions. [2021-07-13 19:11:38,238 INFO L78 Accepts]: Start accepts. Automaton has 707 states and 2448 transitions. Word has length 18 [2021-07-13 19:11:38,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:38,238 INFO L482 AbstractCegarLoop]: Abstraction has 707 states and 2448 transitions. [2021-07-13 19:11:38,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:38,238 INFO L276 IsEmpty]: Start isEmpty. Operand 707 states and 2448 transitions. [2021-07-13 19:11:38,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:11:38,240 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:38,240 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:38,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:38,461 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash -517394769, now seen corresponding path program 1 times [2021-07-13 19:11:38,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:38,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838452330] [2021-07-13 19:11:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:38,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:38,495 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:38,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838452330] [2021-07-13 19:11:38,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838452330] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,495 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82357223] [2021-07-13 19:11:38,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY 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 [2021-07-13 19:11:38,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:38,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:11:38,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:38,647 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:11:38,649 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:38,653 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:38,654 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:38,654 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-13 19:11:38,690 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:38,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82357223] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:38,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:38,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 19:11:38,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118199322] [2021-07-13 19:11:38,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:38,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:38,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:38,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:38,691 INFO L87 Difference]: Start difference. First operand 707 states and 2448 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) [2021-07-13 19:11:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:39,509 INFO L93 Difference]: Finished difference Result 3825 states and 12801 transitions. [2021-07-13 19:11:39,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:11:39,509 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 21 [2021-07-13 19:11:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:39,527 INFO L225 Difference]: With dead ends: 3825 [2021-07-13 19:11:39,528 INFO L226 Difference]: Without dead ends: 3619 [2021-07-13 19:11:39,528 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 532.5ms TimeCoverageRelationStatistics Valid=232, Invalid=698, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:11:39,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3619 states. [2021-07-13 19:11:39,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3619 to 1302. [2021-07-13 19:11:39,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1302 states, 1301 states have (on average 3.6541122213681785) internal successors, (4754), 1301 states have internal predecessors, (4754), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:39,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1302 states to 1302 states and 4754 transitions. [2021-07-13 19:11:39,577 INFO L78 Accepts]: Start accepts. Automaton has 1302 states and 4754 transitions. Word has length 21 [2021-07-13 19:11:39,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:39,577 INFO L482 AbstractCegarLoop]: Abstraction has 1302 states and 4754 transitions. [2021-07-13 19:11:39,577 INFO L483 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) [2021-07-13 19:11:39,577 INFO L276 IsEmpty]: Start isEmpty. Operand 1302 states and 4754 transitions. [2021-07-13 19:11:39,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:11:39,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:39,581 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:39,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:39,800 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:39,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:39,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1831057363, now seen corresponding path program 1 times [2021-07-13 19:11:39,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:39,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601704532] [2021-07-13 19:11:39,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:39,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:39,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:39,826 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:39,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601704532] [2021-07-13 19:11:39,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601704532] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:39,826 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513862498] [2021-07-13 19:11:39,826 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 [2021-07-13 19:11:39,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:39,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:11:39,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:39,935 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:39,935 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513862498] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:39,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:39,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-07-13 19:11:39,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323579529] [2021-07-13 19:11:39,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:39,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:39,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:39,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:39,937 INFO L87 Difference]: Start difference. First operand 1302 states and 4754 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) [2021-07-13 19:11:40,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:40,720 INFO L93 Difference]: Finished difference Result 3835 states and 12901 transitions. [2021-07-13 19:11:40,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:11:40,721 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 21 [2021-07-13 19:11:40,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:40,736 INFO L225 Difference]: With dead ends: 3835 [2021-07-13 19:11:40,737 INFO L226 Difference]: Without dead ends: 3583 [2021-07-13 19:11:40,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 481.1ms TimeCoverageRelationStatistics Valid=193, Invalid=563, Unknown=0, NotChecked=0, Total=756 [2021-07-13 19:11:40,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3583 states. [2021-07-13 19:11:40,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3583 to 1499. [2021-07-13 19:11:40,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 3.6348464619492655) internal successors, (5445), 1498 states have internal predecessors, (5445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 5445 transitions. [2021-07-13 19:11:40,786 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 5445 transitions. Word has length 21 [2021-07-13 19:11:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:40,786 INFO L482 AbstractCegarLoop]: Abstraction has 1499 states and 5445 transitions. [2021-07-13 19:11:40,786 INFO L483 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) [2021-07-13 19:11:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 5445 transitions. [2021-07-13 19:11:40,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:11:40,790 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:40,790 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:41,009 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-07-13 19:11:41,009 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:41,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:41,010 INFO L82 PathProgramCache]: Analyzing trace with hash -1851685711, now seen corresponding path program 2 times [2021-07-13 19:11:41,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:41,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439148900] [2021-07-13 19:11:41,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:41,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:41,040 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:41,040 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439148900] [2021-07-13 19:11:41,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439148900] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:41,040 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1495129683] [2021-07-13 19:11:41,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:11:41,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:41,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:41,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 8 conjunts are in the unsatisfiable core [2021-07-13 19:11:41,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:41,123 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:41,124 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1495129683] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:41,124 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:41,124 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-07-13 19:11:41,124 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1739137048] [2021-07-13 19:11:41,124 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:41,124 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:41,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:41,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:41,125 INFO L87 Difference]: Start difference. First operand 1499 states and 5445 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) [2021-07-13 19:11:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:41,339 INFO L93 Difference]: Finished difference Result 2934 states and 10298 transitions. [2021-07-13 19:11:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:41,339 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 [2021-07-13 19:11:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:41,349 INFO L225 Difference]: With dead ends: 2934 [2021-07-13 19:11:41,349 INFO L226 Difference]: Without dead ends: 2934 [2021-07-13 19:11:41,350 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 106.8ms TimeCoverageRelationStatistics Valid=49, Invalid=83, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:41,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2934 states. [2021-07-13 19:11:41,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2934 to 1307. [2021-07-13 19:11:41,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1307 states, 1306 states have (on average 3.627105666156202) internal successors, (4737), 1306 states have internal predecessors, (4737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1307 states to 1307 states and 4737 transitions. [2021-07-13 19:11:41,389 INFO L78 Accepts]: Start accepts. Automaton has 1307 states and 4737 transitions. Word has length 21 [2021-07-13 19:11:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:41,389 INFO L482 AbstractCegarLoop]: Abstraction has 1307 states and 4737 transitions. [2021-07-13 19:11:41,390 INFO L483 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) [2021-07-13 19:11:41,390 INFO L276 IsEmpty]: Start isEmpty. Operand 1307 states and 4737 transitions. [2021-07-13 19:11:41,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:11:41,393 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:41,393 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:41,609 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-07-13 19:11:41,610 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:41,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:41,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1702251995, now seen corresponding path program 3 times [2021-07-13 19:11:41,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:41,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630888385] [2021-07-13 19:11:41,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:41,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:41,633 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:41,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:41,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630888385] [2021-07-13 19:11:41,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630888385] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:41,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:41,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:11:41,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783352618] [2021-07-13 19:11:41,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:41,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:41,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:41,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:41,635 INFO L87 Difference]: Start difference. First operand 1307 states and 4737 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) [2021-07-13 19:11:41,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:41,707 INFO L93 Difference]: Finished difference Result 2081 states and 7468 transitions. [2021-07-13 19:11:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:41,708 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 [2021-07-13 19:11:41,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:41,713 INFO L225 Difference]: With dead ends: 2081 [2021-07-13 19:11:41,714 INFO L226 Difference]: Without dead ends: 2063 [2021-07-13 19:11:41,714 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.1ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:41,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2063 states. [2021-07-13 19:11:41,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2063 to 1303. [2021-07-13 19:11:41,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1303 states, 1302 states have (on average 3.6267281105990783) internal successors, (4722), 1302 states have internal predecessors, (4722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1303 states to 1303 states and 4722 transitions. [2021-07-13 19:11:41,744 INFO L78 Accepts]: Start accepts. Automaton has 1303 states and 4722 transitions. Word has length 21 [2021-07-13 19:11:41,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:41,744 INFO L482 AbstractCegarLoop]: Abstraction has 1303 states and 4722 transitions. [2021-07-13 19:11:41,744 INFO L483 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) [2021-07-13 19:11:41,744 INFO L276 IsEmpty]: Start isEmpty. Operand 1303 states and 4722 transitions. [2021-07-13 19:11:41,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:11:41,747 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:41,748 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:41,748 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-07-13 19:11:41,748 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:41,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:41,748 INFO L82 PathProgramCache]: Analyzing trace with hash -2028027159, now seen corresponding path program 2 times [2021-07-13 19:11:41,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:41,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477606055] [2021-07-13 19:11:41,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:41,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:41,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:41,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:41,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477606055] [2021-07-13 19:11:41,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477606055] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:41,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:41,770 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:11:41,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379810325] [2021-07-13 19:11:41,770 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:41,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:41,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:41,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:41,770 INFO L87 Difference]: Start difference. First operand 1303 states and 4722 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) [2021-07-13 19:11:41,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:41,839 INFO L93 Difference]: Finished difference Result 2051 states and 7360 transitions. [2021-07-13 19:11:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:41,839 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 [2021-07-13 19:11:41,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:41,845 INFO L225 Difference]: With dead ends: 2051 [2021-07-13 19:11:41,845 INFO L226 Difference]: Without dead ends: 2045 [2021-07-13 19:11:41,846 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.9ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:41,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2045 states. [2021-07-13 19:11:41,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2045 to 1327. [2021-07-13 19:11:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1327 states, 1326 states have (on average 3.6093514328808447) internal successors, (4786), 1326 states have internal predecessors, (4786), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:41,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1327 states to 1327 states and 4786 transitions. [2021-07-13 19:11:41,875 INFO L78 Accepts]: Start accepts. Automaton has 1327 states and 4786 transitions. Word has length 21 [2021-07-13 19:11:41,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:41,876 INFO L482 AbstractCegarLoop]: Abstraction has 1327 states and 4786 transitions. [2021-07-13 19:11:41,876 INFO L483 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) [2021-07-13 19:11:41,876 INFO L276 IsEmpty]: Start isEmpty. Operand 1327 states and 4786 transitions. [2021-07-13 19:11:41,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-07-13 19:11:41,879 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:41,879 INFO L508 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:11:41,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2021-07-13 19:11:41,879 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:41,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:41,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1122312109, now seen corresponding path program 4 times [2021-07-13 19:11:41,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:41,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925458318] [2021-07-13 19:11:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:41,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:41,901 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:41,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:41,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925458318] [2021-07-13 19:11:41,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925458318] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:11:41,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:11:41,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-07-13 19:11:41,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513937043] [2021-07-13 19:11:41,902 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-07-13 19:11:41,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:41,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-07-13 19:11:41,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-07-13 19:11:41,902 INFO L87 Difference]: Start difference. First operand 1327 states and 4786 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) [2021-07-13 19:11:41,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:41,979 INFO L93 Difference]: Finished difference Result 1854 states and 6806 transitions. [2021-07-13 19:11:41,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-07-13 19:11:41,979 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 [2021-07-13 19:11:41,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:41,985 INFO L225 Difference]: With dead ends: 1854 [2021-07-13 19:11:41,985 INFO L226 Difference]: Without dead ends: 1840 [2021-07-13 19:11:41,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 25.0ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:41,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1840 states. [2021-07-13 19:11:42,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1840 to 1265. [2021-07-13 19:11:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1265 states, 1264 states have (on average 3.6360759493670884) internal successors, (4596), 1264 states have internal predecessors, (4596), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:42,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1265 states to 1265 states and 4596 transitions. [2021-07-13 19:11:42,013 INFO L78 Accepts]: Start accepts. Automaton has 1265 states and 4596 transitions. Word has length 21 [2021-07-13 19:11:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:42,013 INFO L482 AbstractCegarLoop]: Abstraction has 1265 states and 4596 transitions. [2021-07-13 19:11:42,014 INFO L483 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) [2021-07-13 19:11:42,014 INFO L276 IsEmpty]: Start isEmpty. Operand 1265 states and 4596 transitions. [2021-07-13 19:11:42,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:42,016 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:42,017 INFO L508 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] [2021-07-13 19:11:42,017 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-07-13 19:11:42,017 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:42,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:42,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1455380781, now seen corresponding path program 1 times [2021-07-13 19:11:42,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:42,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810309630] [2021-07-13 19:11:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:42,104 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:42,105 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:42,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810309630] [2021-07-13 19:11:42,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810309630] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:42,105 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46566107] [2021-07-13 19:11:42,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:42,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:42,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:42,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:42,241 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:42,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46566107] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:42,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:42,241 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:11:42,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542360649] [2021-07-13 19:11:42,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:11:42,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:42,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:11:42,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:42,242 INFO L87 Difference]: Start difference. First operand 1265 states and 4596 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) [2021-07-13 19:11:42,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:42,563 INFO L93 Difference]: Finished difference Result 3756 states and 13001 transitions. [2021-07-13 19:11:42,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:11:42,564 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 [2021-07-13 19:11:42,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:42,572 INFO L225 Difference]: With dead ends: 3756 [2021-07-13 19:11:42,572 INFO L226 Difference]: Without dead ends: 3032 [2021-07-13 19:11:42,572 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:11:42,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3032 states. [2021-07-13 19:11:42,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3032 to 2042. [2021-07-13 19:11:42,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2042 states, 2041 states have (on average 3.724154826065654) internal successors, (7601), 2041 states have internal predecessors, (7601), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:42,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2042 states to 2042 states and 7601 transitions. [2021-07-13 19:11:42,639 INFO L78 Accepts]: Start accepts. Automaton has 2042 states and 7601 transitions. Word has length 24 [2021-07-13 19:11:42,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:42,639 INFO L482 AbstractCegarLoop]: Abstraction has 2042 states and 7601 transitions. [2021-07-13 19:11:42,639 INFO L483 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) [2021-07-13 19:11:42,639 INFO L276 IsEmpty]: Start isEmpty. Operand 2042 states and 7601 transitions. [2021-07-13 19:11:42,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:42,643 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:42,643 INFO L508 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] [2021-07-13 19:11:42,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-07-13 19:11:42,860 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:42,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:42,861 INFO L82 PathProgramCache]: Analyzing trace with hash 2096711821, now seen corresponding path program 2 times [2021-07-13 19:11:42,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:42,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1203438715] [2021-07-13 19:11:42,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:42,910 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:42,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:42,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1203438715] [2021-07-13 19:11:42,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1203438715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:42,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795306606] [2021-07-13 19:11:42,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:42,938 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:42,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:42,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:42,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:43,032 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:43,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795306606] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:43,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:43,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:11:43,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562702044] [2021-07-13 19:11:43,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:11:43,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:43,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:11:43,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:43,034 INFO L87 Difference]: Start difference. First operand 2042 states and 7601 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) [2021-07-13 19:11:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:43,355 INFO L93 Difference]: Finished difference Result 3819 states and 13270 transitions. [2021-07-13 19:11:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:11:43,355 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 [2021-07-13 19:11:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:43,365 INFO L225 Difference]: With dead ends: 3819 [2021-07-13 19:11:43,366 INFO L226 Difference]: Without dead ends: 3419 [2021-07-13 19:11:43,366 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 158.8ms TimeCoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:11:43,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3419 states. [2021-07-13 19:11:43,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3419 to 2196. [2021-07-13 19:11:43,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2196 states, 2195 states have (on average 3.7599088838268795) internal successors, (8253), 2195 states have internal predecessors, (8253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:43,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2196 states to 2196 states and 8253 transitions. [2021-07-13 19:11:43,429 INFO L78 Accepts]: Start accepts. Automaton has 2196 states and 8253 transitions. Word has length 24 [2021-07-13 19:11:43,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:43,430 INFO L482 AbstractCegarLoop]: Abstraction has 2196 states and 8253 transitions. [2021-07-13 19:11:43,430 INFO L483 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) [2021-07-13 19:11:43,430 INFO L276 IsEmpty]: Start isEmpty. Operand 2196 states and 8253 transitions. [2021-07-13 19:11:43,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:43,435 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:43,436 INFO L508 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] [2021-07-13 19:11:43,649 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-07-13 19:11:43,649 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:43,649 INFO L82 PathProgramCache]: Analyzing trace with hash -337245367, now seen corresponding path program 3 times [2021-07-13 19:11:43,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:43,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654464333] [2021-07-13 19:11:43,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:43,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:43,773 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:43,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:43,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654464333] [2021-07-13 19:11:43,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654464333] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:43,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544337162] [2021-07-13 19:11:43,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:43,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:11:43,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:43,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:43,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:43,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [544337162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:43,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:43,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-07-13 19:11:43,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126115840] [2021-07-13 19:11:43,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:11:43,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:43,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:11:43,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:43,934 INFO L87 Difference]: Start difference. First operand 2196 states and 8253 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) [2021-07-13 19:11:44,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:44,336 INFO L93 Difference]: Finished difference Result 4185 states and 15168 transitions. [2021-07-13 19:11:44,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:11:44,337 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 [2021-07-13 19:11:44,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:44,348 INFO L225 Difference]: With dead ends: 4185 [2021-07-13 19:11:44,348 INFO L226 Difference]: Without dead ends: 3585 [2021-07-13 19:11:44,348 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 246.5ms TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:11:44,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3585 states. [2021-07-13 19:11:44,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3585 to 2406. [2021-07-13 19:11:44,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2406 states, 2405 states have (on average 3.761330561330561) internal successors, (9046), 2405 states have internal predecessors, (9046), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:44,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2406 states to 2406 states and 9046 transitions. [2021-07-13 19:11:44,403 INFO L78 Accepts]: Start accepts. Automaton has 2406 states and 9046 transitions. Word has length 24 [2021-07-13 19:11:44,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:44,404 INFO L482 AbstractCegarLoop]: Abstraction has 2406 states and 9046 transitions. [2021-07-13 19:11:44,404 INFO L483 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) [2021-07-13 19:11:44,404 INFO L276 IsEmpty]: Start isEmpty. Operand 2406 states and 9046 transitions. [2021-07-13 19:11:44,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:44,409 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:44,409 INFO L508 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] [2021-07-13 19:11:44,625 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-07-13 19:11:44,625 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:44,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:44,625 INFO L82 PathProgramCache]: Analyzing trace with hash 1257907469, now seen corresponding path program 1 times [2021-07-13 19:11:44,625 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:44,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539122725] [2021-07-13 19:11:44,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:44,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:44,685 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:44,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539122725] [2021-07-13 19:11:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539122725] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1295189784] [2021-07-13 19:11:44,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:44,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:44,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:44,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:44,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:11:44,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:44,801 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:44,802 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:44,802 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-13 19:11:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:44,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1295189784] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:44,871 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:44,871 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:11:44,871 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082109701] [2021-07-13 19:11:44,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:44,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:44,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:44,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:44,871 INFO L87 Difference]: Start difference. First operand 2406 states and 9046 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) [2021-07-13 19:11:45,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:45,125 INFO L93 Difference]: Finished difference Result 4184 states and 14954 transitions. [2021-07-13 19:11:45,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:45,125 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 [2021-07-13 19:11:45,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:45,135 INFO L225 Difference]: With dead ends: 4184 [2021-07-13 19:11:45,135 INFO L226 Difference]: Without dead ends: 3609 [2021-07-13 19:11:45,135 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 122.7ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:45,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3609 states. [2021-07-13 19:11:45,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3609 to 2825. [2021-07-13 19:11:45,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2825 states, 2824 states have (on average 3.685198300283286) internal successors, (10407), 2824 states have internal predecessors, (10407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:45,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2825 states to 2825 states and 10407 transitions. [2021-07-13 19:11:45,197 INFO L78 Accepts]: Start accepts. Automaton has 2825 states and 10407 transitions. Word has length 24 [2021-07-13 19:11:45,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:45,197 INFO L482 AbstractCegarLoop]: Abstraction has 2825 states and 10407 transitions. [2021-07-13 19:11:45,198 INFO L483 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) [2021-07-13 19:11:45,198 INFO L276 IsEmpty]: Start isEmpty. Operand 2825 states and 10407 transitions. [2021-07-13 19:11:45,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:45,203 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:45,203 INFO L508 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] [2021-07-13 19:11:45,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-07-13 19:11:45,422 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:45,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:45,423 INFO L82 PathProgramCache]: Analyzing trace with hash -37818295, now seen corresponding path program 2 times [2021-07-13 19:11:45,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:45,423 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014062917] [2021-07-13 19:11:45,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:45,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:45,483 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:45,483 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:45,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014062917] [2021-07-13 19:11:45,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014062917] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:45,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945604655] [2021-07-13 19:11:45,484 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:45,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:45,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:45,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:45,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:45,589 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:11:45,590 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:45,593 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:45,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:45,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-13 19:11:45,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:45,613 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945604655] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:45,613 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:45,614 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:11:45,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682031490] [2021-07-13 19:11:45,614 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:45,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:45,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:45,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:45,614 INFO L87 Difference]: Start difference. First operand 2825 states and 10407 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) [2021-07-13 19:11:45,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:45,893 INFO L93 Difference]: Finished difference Result 4952 states and 17662 transitions. [2021-07-13 19:11:45,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:45,893 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 [2021-07-13 19:11:45,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:45,905 INFO L225 Difference]: With dead ends: 4952 [2021-07-13 19:11:45,905 INFO L226 Difference]: Without dead ends: 4907 [2021-07-13 19:11:45,906 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 109.3ms TimeCoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:45,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4907 states. [2021-07-13 19:11:45,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4907 to 3559. [2021-07-13 19:11:45,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 3.7141652613827993) internal successors, (13215), 3558 states have internal predecessors, (13215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:45,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 13215 transitions. [2021-07-13 19:11:45,991 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 13215 transitions. Word has length 24 [2021-07-13 19:11:45,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:45,991 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 13215 transitions. [2021-07-13 19:11:45,991 INFO L483 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) [2021-07-13 19:11:45,991 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 13215 transitions. [2021-07-13 19:11:45,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:45,999 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:45,999 INFO L508 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] [2021-07-13 19:11:46,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:46,219 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:46,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:46,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1702471575, now seen corresponding path program 1 times [2021-07-13 19:11:46,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:46,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150167054] [2021-07-13 19:11:46,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:46,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:46,327 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:46,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:46,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150167054] [2021-07-13 19:11:46,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150167054] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:46,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460618510] [2021-07-13 19:11:46,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:46,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:46,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:46,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:46,503 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:46,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460618510] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:46,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:46,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:11:46,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [183388608] [2021-07-13 19:11:46,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:11:46,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:46,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:11:46,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:46,504 INFO L87 Difference]: Start difference. First operand 3559 states and 13215 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) [2021-07-13 19:11:46,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:46,727 INFO L93 Difference]: Finished difference Result 4119 states and 14931 transitions. [2021-07-13 19:11:46,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:46,727 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 [2021-07-13 19:11:46,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:46,737 INFO L225 Difference]: With dead ends: 4119 [2021-07-13 19:11:46,737 INFO L226 Difference]: Without dead ends: 3762 [2021-07-13 19:11:46,737 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 197.6ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:11:46,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-07-13 19:11:46,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3576. [2021-07-13 19:11:46,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 3.7023776223776226) internal successors, (13236), 3575 states have internal predecessors, (13236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:46,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 13236 transitions. [2021-07-13 19:11:46,845 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 13236 transitions. Word has length 24 [2021-07-13 19:11:46,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:46,845 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 13236 transitions. [2021-07-13 19:11:46,846 INFO L483 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) [2021-07-13 19:11:46,846 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 13236 transitions. [2021-07-13 19:11:46,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:46,853 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:46,853 INFO L508 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] [2021-07-13 19:11:47,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:47,071 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:47,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:47,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1483062673, now seen corresponding path program 2 times [2021-07-13 19:11:47,071 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:47,071 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666416747] [2021-07-13 19:11:47,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:47,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:47,178 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:47,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:47,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666416747] [2021-07-13 19:11:47,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666416747] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:47,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715867056] [2021-07-13 19:11:47,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:11:47,206 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:47,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:47,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:47,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:47,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715867056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:47,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:47,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:11:47,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668275650] [2021-07-13 19:11:47,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:11:47,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:47,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:11:47,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:47,337 INFO L87 Difference]: Start difference. First operand 3576 states and 13236 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) [2021-07-13 19:11:47,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:47,598 INFO L93 Difference]: Finished difference Result 4175 states and 15081 transitions. [2021-07-13 19:11:47,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:47,599 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 [2021-07-13 19:11:47,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:47,608 INFO L225 Difference]: With dead ends: 4175 [2021-07-13 19:11:47,608 INFO L226 Difference]: Without dead ends: 3615 [2021-07-13 19:11:47,611 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 229.1ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:11:47,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3615 states. [2021-07-13 19:11:47,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3615 to 3429. [2021-07-13 19:11:47,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3429 states, 3428 states have (on average 3.731330221703617) internal successors, (12791), 3428 states have internal predecessors, (12791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:47,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3429 states to 3429 states and 12791 transitions. [2021-07-13 19:11:47,714 INFO L78 Accepts]: Start accepts. Automaton has 3429 states and 12791 transitions. Word has length 24 [2021-07-13 19:11:47,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:47,714 INFO L482 AbstractCegarLoop]: Abstraction has 3429 states and 12791 transitions. [2021-07-13 19:11:47,714 INFO L483 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) [2021-07-13 19:11:47,715 INFO L276 IsEmpty]: Start isEmpty. Operand 3429 states and 12791 transitions. [2021-07-13 19:11:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:47,734 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:47,734 INFO L508 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] [2021-07-13 19:11:47,934 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-07-13 19:11:47,934 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:47,935 INFO L82 PathProgramCache]: Analyzing trace with hash -712088919, now seen corresponding path program 1 times [2021-07-13 19:11:47,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:47,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751447490] [2021-07-13 19:11:47,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:48,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:48,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751447490] [2021-07-13 19:11:48,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751447490] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130817255] [2021-07-13 19:11:48,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:48,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:48,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 12 conjunts are in the unsatisfiable core [2021-07-13 19:11:48,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:48,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:48,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130817255] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,158 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:48,158 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 12 [2021-07-13 19:11:48,158 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259844400] [2021-07-13 19:11:48,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:11:48,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:48,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:11:48,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:48,159 INFO L87 Difference]: Start difference. First operand 3429 states and 12791 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) [2021-07-13 19:11:48,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:48,482 INFO L93 Difference]: Finished difference Result 4987 states and 17858 transitions. [2021-07-13 19:11:48,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:48,483 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 [2021-07-13 19:11:48,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:48,492 INFO L225 Difference]: With dead ends: 4987 [2021-07-13 19:11:48,493 INFO L226 Difference]: Without dead ends: 3821 [2021-07-13 19:11:48,493 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 241.3ms TimeCoverageRelationStatistics Valid=101, Invalid=241, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:11:48,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-07-13 19:11:48,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3319. [2021-07-13 19:11:48,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3319 states, 3318 states have (on average 3.648583484026522) internal successors, (12106), 3318 states have internal predecessors, (12106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:48,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3319 states to 3319 states and 12106 transitions. [2021-07-13 19:11:48,573 INFO L78 Accepts]: Start accepts. Automaton has 3319 states and 12106 transitions. Word has length 24 [2021-07-13 19:11:48,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:48,573 INFO L482 AbstractCegarLoop]: Abstraction has 3319 states and 12106 transitions. [2021-07-13 19:11:48,573 INFO L483 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) [2021-07-13 19:11:48,573 INFO L276 IsEmpty]: Start isEmpty. Operand 3319 states and 12106 transitions. [2021-07-13 19:11:48,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:48,581 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:48,581 INFO L508 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] [2021-07-13 19:11:48,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:48,789 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:48,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:48,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1948181261, now seen corresponding path program 1 times [2021-07-13 19:11:48,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:48,789 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096066080] [2021-07-13 19:11:48,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:48,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:48,867 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:48,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096066080] [2021-07-13 19:11:48,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096066080] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,867 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317654811] [2021-07-13 19:11:48,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:48,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:48,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:48,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:48,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:11:48,937 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:48,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:48,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:48,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-13 19:11:48,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:48,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317654811] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:48,964 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:48,964 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 19:11:48,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670307518] [2021-07-13 19:11:48,965 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:48,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:48,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:48,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:48,965 INFO L87 Difference]: Start difference. First operand 3319 states and 12106 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) [2021-07-13 19:11:49,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:49,200 INFO L93 Difference]: Finished difference Result 4339 states and 15458 transitions. [2021-07-13 19:11:49,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:49,201 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 [2021-07-13 19:11:49,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:49,210 INFO L225 Difference]: With dead ends: 4339 [2021-07-13 19:11:49,211 INFO L226 Difference]: Without dead ends: 4198 [2021-07-13 19:11:49,211 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 124.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:49,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4198 states. [2021-07-13 19:11:49,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4198 to 3613. [2021-07-13 19:11:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3613 states, 3612 states have (on average 3.638704318936877) internal successors, (13143), 3612 states have internal predecessors, (13143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:49,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3613 states to 3613 states and 13143 transitions. [2021-07-13 19:11:49,284 INFO L78 Accepts]: Start accepts. Automaton has 3613 states and 13143 transitions. Word has length 24 [2021-07-13 19:11:49,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:49,284 INFO L482 AbstractCegarLoop]: Abstraction has 3613 states and 13143 transitions. [2021-07-13 19:11:49,284 INFO L483 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) [2021-07-13 19:11:49,284 INFO L276 IsEmpty]: Start isEmpty. Operand 3613 states and 13143 transitions. [2021-07-13 19:11:49,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:49,291 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:49,291 INFO L508 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] [2021-07-13 19:11:49,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-07-13 19:11:49,511 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:49,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:49,511 INFO L82 PathProgramCache]: Analyzing trace with hash 1874823949, now seen corresponding path program 3 times [2021-07-13 19:11:49,511 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:49,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475556534] [2021-07-13 19:11:49,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:49,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:49,555 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:49,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:49,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475556534] [2021-07-13 19:11:49,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475556534] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:49,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420430969] [2021-07-13 19:11:49,556 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 [2021-07-13 19:11:49,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-07-13 19:11:49,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:49,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:49,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:49,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:11:49,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:49,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:49,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:49,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-13 19:11:49,642 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:49,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [420430969] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:49,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:49,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:11:49,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289478343] [2021-07-13 19:11:49,643 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:49,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:49,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:49,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:49,643 INFO L87 Difference]: Start difference. First operand 3613 states and 13143 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) [2021-07-13 19:11:49,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:49,831 INFO L93 Difference]: Finished difference Result 4148 states and 14673 transitions. [2021-07-13 19:11:49,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:49,831 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 [2021-07-13 19:11:49,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:49,839 INFO L225 Difference]: With dead ends: 4148 [2021-07-13 19:11:49,839 INFO L226 Difference]: Without dead ends: 3464 [2021-07-13 19:11:49,840 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 102.8ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:49,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3464 states. [2021-07-13 19:11:49,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3464 to 3015. [2021-07-13 19:11:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3015 states, 3014 states have (on average 3.6250829462508296) internal successors, (10926), 3014 states have internal predecessors, (10926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3015 states to 3015 states and 10926 transitions. [2021-07-13 19:11:49,891 INFO L78 Accepts]: Start accepts. Automaton has 3015 states and 10926 transitions. Word has length 24 [2021-07-13 19:11:49,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:49,891 INFO L482 AbstractCegarLoop]: Abstraction has 3015 states and 10926 transitions. [2021-07-13 19:11:49,892 INFO L483 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) [2021-07-13 19:11:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 3015 states and 10926 transitions. [2021-07-13 19:11:49,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:49,897 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:49,897 INFO L508 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] [2021-07-13 19:11:50,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-07-13 19:11:50,114 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:50,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:50,114 INFO L82 PathProgramCache]: Analyzing trace with hash -853710037, now seen corresponding path program 4 times [2021-07-13 19:11:50,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:50,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550727795] [2021-07-13 19:11:50,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:50,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:50,171 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:50,172 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:50,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550727795] [2021-07-13 19:11:50,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550727795] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:50,172 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634198672] [2021-07-13 19:11:50,172 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 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 [2021-07-13 19:11:50,197 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:50,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:50,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:50,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:50,232 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:11:50,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:50,235 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:50,236 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:50,236 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-13 19:11:50,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:50,253 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634198672] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:50,253 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:50,253 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 19:11:50,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197633070] [2021-07-13 19:11:50,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:50,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:50,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:50,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:50,254 INFO L87 Difference]: Start difference. First operand 3015 states and 10926 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) [2021-07-13 19:11:50,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:50,455 INFO L93 Difference]: Finished difference Result 3294 states and 11794 transitions. [2021-07-13 19:11:50,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:50,455 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 [2021-07-13 19:11:50,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:50,463 INFO L225 Difference]: With dead ends: 3294 [2021-07-13 19:11:50,463 INFO L226 Difference]: Without dead ends: 3294 [2021-07-13 19:11:50,463 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 96.5ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:50,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3294 states. [2021-07-13 19:11:50,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3294 to 3106. [2021-07-13 19:11:50,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3106 states, 3105 states have (on average 3.61256038647343) internal successors, (11217), 3105 states have internal predecessors, (11217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:50,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3106 states to 3106 states and 11217 transitions. [2021-07-13 19:11:50,516 INFO L78 Accepts]: Start accepts. Automaton has 3106 states and 11217 transitions. Word has length 24 [2021-07-13 19:11:50,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:50,517 INFO L482 AbstractCegarLoop]: Abstraction has 3106 states and 11217 transitions. [2021-07-13 19:11:50,517 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:50,517 INFO L276 IsEmpty]: Start isEmpty. Operand 3106 states and 11217 transitions. [2021-07-13 19:11:50,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:50,523 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:50,523 INFO L508 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] [2021-07-13 19:11:50,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-07-13 19:11:50,739 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:50,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:50,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1540696521, now seen corresponding path program 5 times [2021-07-13 19:11:50,740 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:50,740 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998310550] [2021-07-13 19:11:50,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:50,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:50,783 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:50,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998310550] [2021-07-13 19:11:50,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998310550] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:50,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506164390] [2021-07-13 19:11:50,784 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 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 [2021-07-13 19:11:50,810 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:11:50,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:50,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:50,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:50,844 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 16 treesize of output 12 [2021-07-13 19:11:50,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:50,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:50,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:50,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-13 19:11:50,867 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:50,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506164390] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:50,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:50,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:11:50,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886570059] [2021-07-13 19:11:50,867 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:50,867 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:50,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:50,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:50,868 INFO L87 Difference]: Start difference. First operand 3106 states and 11217 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) [2021-07-13 19:11:51,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:51,072 INFO L93 Difference]: Finished difference Result 4306 states and 15126 transitions. [2021-07-13 19:11:51,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:51,073 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 [2021-07-13 19:11:51,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:51,082 INFO L225 Difference]: With dead ends: 4306 [2021-07-13 19:11:51,082 INFO L226 Difference]: Without dead ends: 4306 [2021-07-13 19:11:51,083 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 106.5ms TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:51,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-07-13 19:11:51,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3262. [2021-07-13 19:11:51,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3262 states, 3261 states have (on average 3.609015639374425) internal successors, (11769), 3261 states have internal predecessors, (11769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:51,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3262 states to 3262 states and 11769 transitions. [2021-07-13 19:11:51,143 INFO L78 Accepts]: Start accepts. Automaton has 3262 states and 11769 transitions. Word has length 24 [2021-07-13 19:11:51,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:51,143 INFO L482 AbstractCegarLoop]: Abstraction has 3262 states and 11769 transitions. [2021-07-13 19:11:51,143 INFO L483 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) [2021-07-13 19:11:51,143 INFO L276 IsEmpty]: Start isEmpty. Operand 3262 states and 11769 transitions. [2021-07-13 19:11:51,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:51,150 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:51,150 INFO L508 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] [2021-07-13 19:11:51,365 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-07-13 19:11:51,365 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:51,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:51,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1089617495, now seen corresponding path program 3 times [2021-07-13 19:11:51,366 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:51,366 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176964543] [2021-07-13 19:11:51,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:51,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:51,501 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:51,502 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:51,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176964543] [2021-07-13 19:11:51,502 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176964543] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:51,502 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512173064] [2021-07-13 19:11:51,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:51,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:11:51,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:51,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:51,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:51,641 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:51,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512173064] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:51,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:51,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:11:51,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242826834] [2021-07-13 19:11:51,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:11:51,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:51,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:11:51,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:51,642 INFO L87 Difference]: Start difference. First operand 3262 states and 11769 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) [2021-07-13 19:11:51,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:51,953 INFO L93 Difference]: Finished difference Result 3881 states and 13726 transitions. [2021-07-13 19:11:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:51,953 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 [2021-07-13 19:11:51,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:51,961 INFO L225 Difference]: With dead ends: 3881 [2021-07-13 19:11:51,961 INFO L226 Difference]: Without dead ends: 3516 [2021-07-13 19:11:51,962 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 296.6ms TimeCoverageRelationStatistics Valid=85, Invalid=221, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:11:51,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3516 states. [2021-07-13 19:11:52,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3516 to 3289. [2021-07-13 19:11:52,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3289 states, 3288 states have (on average 3.602493917274939) internal successors, (11845), 3288 states have internal predecessors, (11845), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:52,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3289 states to 3289 states and 11845 transitions. [2021-07-13 19:11:52,016 INFO L78 Accepts]: Start accepts. Automaton has 3289 states and 11845 transitions. Word has length 24 [2021-07-13 19:11:52,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:52,016 INFO L482 AbstractCegarLoop]: Abstraction has 3289 states and 11845 transitions. [2021-07-13 19:11:52,017 INFO L483 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) [2021-07-13 19:11:52,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3289 states and 11845 transitions. [2021-07-13 19:11:52,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:52,023 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:52,023 INFO L508 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] [2021-07-13 19:11:52,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-07-13 19:11:52,229 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:52,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:52,229 INFO L82 PathProgramCache]: Analyzing trace with hash 2129098641, now seen corresponding path program 6 times [2021-07-13 19:11:52,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:52,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711095371] [2021-07-13 19:11:52,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:52,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:52,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:52,293 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:52,293 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711095371] [2021-07-13 19:11:52,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711095371] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:52,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020092392] [2021-07-13 19:11:52,294 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:52,318 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-07-13 19:11:52,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:52,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:52,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:52,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:11:52,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:52,357 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:52,357 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:52,357 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-13 19:11:52,374 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:52,374 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020092392] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:52,374 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:52,374 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 19:11:52,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21413327] [2021-07-13 19:11:52,375 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:52,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:52,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:52,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:52,375 INFO L87 Difference]: Start difference. First operand 3289 states and 11845 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-07-13 19:11:52,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:52,553 INFO L93 Difference]: Finished difference Result 3630 states and 12852 transitions. [2021-07-13 19:11:52,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:52,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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 [2021-07-13 19:11:52,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:52,562 INFO L225 Difference]: With dead ends: 3630 [2021-07-13 19:11:52,562 INFO L226 Difference]: Without dead ends: 3630 [2021-07-13 19:11:52,562 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:52,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3630 states. [2021-07-13 19:11:52,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3630 to 3263. [2021-07-13 19:11:52,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 3.600551808706315) internal successors, (11745), 3262 states have internal predecessors, (11745), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:52,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 11745 transitions. [2021-07-13 19:11:52,617 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 11745 transitions. Word has length 24 [2021-07-13 19:11:52,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:52,617 INFO L482 AbstractCegarLoop]: Abstraction has 3263 states and 11745 transitions. [2021-07-13 19:11:52,617 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 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) [2021-07-13 19:11:52,617 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 11745 transitions. [2021-07-13 19:11:52,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:52,624 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:52,624 INFO L508 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] [2021-07-13 19:11:52,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:52,831 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:52,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:52,831 INFO L82 PathProgramCache]: Analyzing trace with hash -533600713, now seen corresponding path program 2 times [2021-07-13 19:11:52,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:52,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275185027] [2021-07-13 19:11:52,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:52,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:52,942 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:52,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:52,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275185027] [2021-07-13 19:11:52,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275185027] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:52,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1897426155] [2021-07-13 19:11:52,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:11:52,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:52,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:52,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:52,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:53,000 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:11:53,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:53,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:53,004 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:53,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-13 19:11:53,022 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:53,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1897426155] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:53,022 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:53,022 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:11:53,022 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457637596] [2021-07-13 19:11:53,023 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:53,023 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:53,023 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:53,023 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:53,023 INFO L87 Difference]: Start difference. First operand 3263 states and 11745 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) [2021-07-13 19:11:53,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:53,251 INFO L93 Difference]: Finished difference Result 3854 states and 13464 transitions. [2021-07-13 19:11:53,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:53,252 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 [2021-07-13 19:11:53,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:53,260 INFO L225 Difference]: With dead ends: 3854 [2021-07-13 19:11:53,261 INFO L226 Difference]: Without dead ends: 3810 [2021-07-13 19:11:53,261 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 164.3ms TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:53,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3810 states. [2021-07-13 19:11:53,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3810 to 3156. [2021-07-13 19:11:53,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3156 states, 3155 states have (on average 3.5984152139461174) internal successors, (11353), 3155 states have internal predecessors, (11353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:53,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3156 states to 3156 states and 11353 transitions. [2021-07-13 19:11:53,324 INFO L78 Accepts]: Start accepts. Automaton has 3156 states and 11353 transitions. Word has length 24 [2021-07-13 19:11:53,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:53,324 INFO L482 AbstractCegarLoop]: Abstraction has 3156 states and 11353 transitions. [2021-07-13 19:11:53,325 INFO L483 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) [2021-07-13 19:11:53,325 INFO L276 IsEmpty]: Start isEmpty. Operand 3156 states and 11353 transitions. [2021-07-13 19:11:53,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:53,331 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:53,331 INFO L508 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] [2021-07-13 19:11:53,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-07-13 19:11:53,547 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:53,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:53,547 INFO L82 PathProgramCache]: Analyzing trace with hash -1862582325, now seen corresponding path program 3 times [2021-07-13 19:11:53,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:53,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515677868] [2021-07-13 19:11:53,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:53,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:53,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:53,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:53,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515677868] [2021-07-13 19:11:53,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515677868] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:53,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924131754] [2021-07-13 19:11:53,586 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 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 [2021-07-13 19:11:53,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:11:53,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:53,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:53,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:53,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:11:53,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:53,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:53,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:53,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-13 19:11:53,666 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:53,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924131754] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:53,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:53,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 19:11:53,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222897681] [2021-07-13 19:11:53,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:53,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:53,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:53,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:53,667 INFO L87 Difference]: Start difference. First operand 3156 states and 11353 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) [2021-07-13 19:11:53,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:53,837 INFO L93 Difference]: Finished difference Result 3384 states and 11803 transitions. [2021-07-13 19:11:53,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:53,837 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 [2021-07-13 19:11:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:53,844 INFO L225 Difference]: With dead ends: 3384 [2021-07-13 19:11:53,845 INFO L226 Difference]: Without dead ends: 3321 [2021-07-13 19:11:53,845 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 97.3ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:53,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3321 states. [2021-07-13 19:11:53,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3321 to 2530. [2021-07-13 19:11:53,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2530 states, 2529 states have (on average 3.593910636615263) internal successors, (9089), 2529 states have internal predecessors, (9089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:53,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2530 states to 2530 states and 9089 transitions. [2021-07-13 19:11:53,888 INFO L78 Accepts]: Start accepts. Automaton has 2530 states and 9089 transitions. Word has length 24 [2021-07-13 19:11:53,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:53,888 INFO L482 AbstractCegarLoop]: Abstraction has 2530 states and 9089 transitions. [2021-07-13 19:11:53,888 INFO L483 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) [2021-07-13 19:11:53,888 INFO L276 IsEmpty]: Start isEmpty. Operand 2530 states and 9089 transitions. [2021-07-13 19:11:53,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:53,893 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:53,893 INFO L508 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] [2021-07-13 19:11:54,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:54,109 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:54,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:54,109 INFO L82 PathProgramCache]: Analyzing trace with hash 316647389, now seen corresponding path program 4 times [2021-07-13 19:11:54,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:54,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081009698] [2021-07-13 19:11:54,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:54,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:54,233 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:54,234 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:54,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081009698] [2021-07-13 19:11:54,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081009698] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:54,234 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876455286] [2021-07-13 19:11:54,234 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 [2021-07-13 19:11:54,258 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:54,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:54,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:54,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:54,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:54,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876455286] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:54,373 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:54,373 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:11:54,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921568995] [2021-07-13 19:11:54,373 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:11:54,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:54,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:11:54,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:54,373 INFO L87 Difference]: Start difference. First operand 2530 states and 9089 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) [2021-07-13 19:11:54,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:54,772 INFO L93 Difference]: Finished difference Result 3403 states and 11831 transitions. [2021-07-13 19:11:54,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:11:54,772 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 [2021-07-13 19:11:54,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:54,778 INFO L225 Difference]: With dead ends: 3403 [2021-07-13 19:11:54,778 INFO L226 Difference]: Without dead ends: 2711 [2021-07-13 19:11:54,779 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 307.9ms TimeCoverageRelationStatistics Valid=95, Invalid=247, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:11:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2711 states. [2021-07-13 19:11:54,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2711 to 2524. [2021-07-13 19:11:54,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2524 states, 2523 states have (on average 3.594926674593738) internal successors, (9070), 2523 states have internal predecessors, (9070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:54,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2524 states to 2524 states and 9070 transitions. [2021-07-13 19:11:54,817 INFO L78 Accepts]: Start accepts. Automaton has 2524 states and 9070 transitions. Word has length 24 [2021-07-13 19:11:54,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:54,817 INFO L482 AbstractCegarLoop]: Abstraction has 2524 states and 9070 transitions. [2021-07-13 19:11:54,817 INFO L483 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) [2021-07-13 19:11:54,817 INFO L276 IsEmpty]: Start isEmpty. Operand 2524 states and 9070 transitions. [2021-07-13 19:11:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-07-13 19:11:54,821 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:54,821 INFO L508 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] [2021-07-13 19:11:55,037 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-07-13 19:11:55,037 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:55,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:55,037 INFO L82 PathProgramCache]: Analyzing trace with hash -2118036169, now seen corresponding path program 5 times [2021-07-13 19:11:55,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:55,038 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800649375] [2021-07-13 19:11:55,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:55,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:55,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:55,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800649375] [2021-07-13 19:11:55,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800649375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:55,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021746880] [2021-07-13 19:11:55,167 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 [2021-07-13 19:11:55,223 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:55,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:55,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 13 conjunts are in the unsatisfiable core [2021-07-13 19:11:55,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:55,335 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:11:55,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021746880] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:55,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:55,336 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:11:55,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829631674] [2021-07-13 19:11:55,336 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:11:55,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:55,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:11:55,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:55,337 INFO L87 Difference]: Start difference. First operand 2524 states and 9070 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) [2021-07-13 19:11:55,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:55,738 INFO L93 Difference]: Finished difference Result 3698 states and 12705 transitions. [2021-07-13 19:11:55,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:11:55,738 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 [2021-07-13 19:11:55,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:55,743 INFO L225 Difference]: With dead ends: 3698 [2021-07-13 19:11:55,744 INFO L226 Difference]: Without dead ends: 2495 [2021-07-13 19:11:55,744 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 312.7ms TimeCoverageRelationStatistics Valid=118, Invalid=302, Unknown=0, NotChecked=0, Total=420 [2021-07-13 19:11:55,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2495 states. [2021-07-13 19:11:55,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2495 to 2347. [2021-07-13 19:11:55,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2347 states, 2346 states have (on average 3.6027280477408357) internal successors, (8452), 2346 states have internal predecessors, (8452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:55,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2347 states to 2347 states and 8452 transitions. [2021-07-13 19:11:55,777 INFO L78 Accepts]: Start accepts. Automaton has 2347 states and 8452 transitions. Word has length 24 [2021-07-13 19:11:55,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:55,778 INFO L482 AbstractCegarLoop]: Abstraction has 2347 states and 8452 transitions. [2021-07-13 19:11:55,778 INFO L483 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) [2021-07-13 19:11:55,778 INFO L276 IsEmpty]: Start isEmpty. Operand 2347 states and 8452 transitions. [2021-07-13 19:11:55,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:11:55,781 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:55,781 INFO L508 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] [2021-07-13 19:11:55,997 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:55,998 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:55,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:55,999 INFO L82 PathProgramCache]: Analyzing trace with hash -579383647, now seen corresponding path program 4 times [2021-07-13 19:11:55,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:55,999 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218641360] [2021-07-13 19:11:55,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:56,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:56,042 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:56,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:56,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218641360] [2021-07-13 19:11:56,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218641360] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:56,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [83531787] [2021-07-13 19:11:56,043 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 [2021-07-13 19:11:56,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:11:56,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:56,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:56,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:56,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [83531787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:56,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:56,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:11:56,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005666279] [2021-07-13 19:11:56,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:56,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:56,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:56,125 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:56,125 INFO L87 Difference]: Start difference. First operand 2347 states and 8452 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) [2021-07-13 19:11:56,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:56,334 INFO L93 Difference]: Finished difference Result 7003 states and 24374 transitions. [2021-07-13 19:11:56,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:11:56,335 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 [2021-07-13 19:11:56,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:56,350 INFO L225 Difference]: With dead ends: 7003 [2021-07-13 19:11:56,350 INFO L226 Difference]: Without dead ends: 6243 [2021-07-13 19:11:56,351 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2021-07-13 19:11:56,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6243 states. [2021-07-13 19:11:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6243 to 3941. [2021-07-13 19:11:56,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 3.7758883248730966) internal successors, (14877), 3940 states have internal predecessors, (14877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:56,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 14877 transitions. [2021-07-13 19:11:56,435 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 14877 transitions. Word has length 27 [2021-07-13 19:11:56,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:56,435 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 14877 transitions. [2021-07-13 19:11:56,435 INFO L483 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) [2021-07-13 19:11:56,435 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 14877 transitions. [2021-07-13 19:11:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:11:56,442 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:56,442 INFO L508 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] [2021-07-13 19:11:56,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-07-13 19:11:56,649 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:56,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:56,649 INFO L82 PathProgramCache]: Analyzing trace with hash 755204605, now seen corresponding path program 1 times [2021-07-13 19:11:56,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:56,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551542332] [2021-07-13 19:11:56,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:56,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:56,715 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:56,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:56,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551542332] [2021-07-13 19:11:56,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551542332] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:56,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481328830] [2021-07-13 19:11:56,715 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) [2021-07-13 19:11:56,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:56,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:56,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:56,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:11:56,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:56,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:56,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:56,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-13 19:11:56,836 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:56,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481328830] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:56,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:56,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 19:11:56,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807480730] [2021-07-13 19:11:56,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:56,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:56,838 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:56,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:56,838 INFO L87 Difference]: Start difference. First operand 3941 states and 14877 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) [2021-07-13 19:11:57,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:57,005 INFO L93 Difference]: Finished difference Result 5052 states and 18543 transitions. [2021-07-13 19:11:57,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:11:57,006 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 [2021-07-13 19:11:57,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:57,017 INFO L225 Difference]: With dead ends: 5052 [2021-07-13 19:11:57,017 INFO L226 Difference]: Without dead ends: 4862 [2021-07-13 19:11:57,017 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 92.1ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:11:57,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4862 states. [2021-07-13 19:11:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4862 to 4231. [2021-07-13 19:11:57,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4231 states, 4230 states have (on average 3.753900709219858) internal successors, (15879), 4230 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:57,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4231 states to 4231 states and 15879 transitions. [2021-07-13 19:11:57,092 INFO L78 Accepts]: Start accepts. Automaton has 4231 states and 15879 transitions. Word has length 27 [2021-07-13 19:11:57,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:57,092 INFO L482 AbstractCegarLoop]: Abstraction has 4231 states and 15879 transitions. [2021-07-13 19:11:57,092 INFO L483 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) [2021-07-13 19:11:57,092 INFO L276 IsEmpty]: Start isEmpty. Operand 4231 states and 15879 transitions. [2021-07-13 19:11:57,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:11:57,100 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:57,100 INFO L508 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] [2021-07-13 19:11:57,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:57,313 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:57,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:57,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1627375381, now seen corresponding path program 5 times [2021-07-13 19:11:57,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:57,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808326869] [2021-07-13 19:11:57,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:57,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:57,341 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:57,341 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:57,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808326869] [2021-07-13 19:11:57,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808326869] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:57,341 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955273162] [2021-07-13 19:11:57,341 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 [2021-07-13 19:11:57,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:11:57,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:57,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:57,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:57,425 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955273162] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:57,425 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:57,425 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 7] total 8 [2021-07-13 19:11:57,425 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391800388] [2021-07-13 19:11:57,426 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:57,426 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:57,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:57,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:57,429 INFO L87 Difference]: Start difference. First operand 4231 states and 15879 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) [2021-07-13 19:11:57,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:57,596 INFO L93 Difference]: Finished difference Result 6079 states and 21441 transitions. [2021-07-13 19:11:57,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:57,597 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 [2021-07-13 19:11:57,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:57,610 INFO L225 Difference]: With dead ends: 6079 [2021-07-13 19:11:57,610 INFO L226 Difference]: Without dead ends: 5466 [2021-07-13 19:11:57,610 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 68.5ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:11:57,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5466 states. [2021-07-13 19:11:57,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5466 to 4109. [2021-07-13 19:11:57,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4109 states, 4108 states have (on average 3.7458617332035056) internal successors, (15388), 4108 states have internal predecessors, (15388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:57,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4109 states to 4109 states and 15388 transitions. [2021-07-13 19:11:57,711 INFO L78 Accepts]: Start accepts. Automaton has 4109 states and 15388 transitions. Word has length 27 [2021-07-13 19:11:57,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:57,711 INFO L482 AbstractCegarLoop]: Abstraction has 4109 states and 15388 transitions. [2021-07-13 19:11:57,711 INFO L483 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) [2021-07-13 19:11:57,712 INFO L276 IsEmpty]: Start isEmpty. Operand 4109 states and 15388 transitions. [2021-07-13 19:11:57,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:11:57,719 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:57,719 INFO L508 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] [2021-07-13 19:11:57,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-07-13 19:11:57,933 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:57,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:57,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1329916833, now seen corresponding path program 6 times [2021-07-13 19:11:57,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:57,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316115675] [2021-07-13 19:11:57,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:57,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:57,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:57,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316115675] [2021-07-13 19:11:57,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316115675] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:57,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541086199] [2021-07-13 19:11:57,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:57,990 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-07-13 19:11:57,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:57,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:57,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:58,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:58,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [541086199] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:58,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:58,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 6 [2021-07-13 19:11:58,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62309556] [2021-07-13 19:11:58,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-07-13 19:11:58,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:58,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-07-13 19:11:58,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:11:58,034 INFO L87 Difference]: Start difference. First operand 4109 states and 15388 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) [2021-07-13 19:11:58,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:58,157 INFO L93 Difference]: Finished difference Result 8656 states and 31846 transitions. [2021-07-13 19:11:58,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:11:58,157 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 [2021-07-13 19:11:58,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:58,178 INFO L225 Difference]: With dead ends: 8656 [2021-07-13 19:11:58,178 INFO L226 Difference]: Without dead ends: 8340 [2021-07-13 19:11:58,179 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 40.1ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:58,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8340 states. [2021-07-13 19:11:58,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8340 to 5370. [2021-07-13 19:11:58,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5370 states, 5369 states have (on average 3.8379586515179738) internal successors, (20606), 5369 states have internal predecessors, (20606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:58,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5370 states to 5370 states and 20606 transitions. [2021-07-13 19:11:58,293 INFO L78 Accepts]: Start accepts. Automaton has 5370 states and 20606 transitions. Word has length 27 [2021-07-13 19:11:58,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:58,294 INFO L482 AbstractCegarLoop]: Abstraction has 5370 states and 20606 transitions. [2021-07-13 19:11:58,294 INFO L483 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) [2021-07-13 19:11:58,294 INFO L276 IsEmpty]: Start isEmpty. Operand 5370 states and 20606 transitions. [2021-07-13 19:11:58,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:11:58,303 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:58,303 INFO L508 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] [2021-07-13 19:11:58,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:11:58,520 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:58,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:58,520 INFO L82 PathProgramCache]: Analyzing trace with hash 1648096775, now seen corresponding path program 7 times [2021-07-13 19:11:58,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:58,520 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954550024] [2021-07-13 19:11:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:58,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:58,553 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:58,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:58,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954550024] [2021-07-13 19:11:58,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954550024] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:58,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101277720] [2021-07-13 19:11:58,554 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 [2021-07-13 19:11:58,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:58,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:58,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:58,630 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:58,631 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101277720] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:58,631 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:58,631 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6] total 7 [2021-07-13 19:11:58,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808015647] [2021-07-13 19:11:58,631 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-07-13 19:11:58,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:58,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-07-13 19:11:58,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2021-07-13 19:11:58,631 INFO L87 Difference]: Start difference. First operand 5370 states and 20606 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) [2021-07-13 19:11:58,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:58,738 INFO L93 Difference]: Finished difference Result 8619 states and 31580 transitions. [2021-07-13 19:11:58,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:11:58,738 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 [2021-07-13 19:11:58,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:58,758 INFO L225 Difference]: With dead ends: 8619 [2021-07-13 19:11:58,759 INFO L226 Difference]: Without dead ends: 8251 [2021-07-13 19:11:58,759 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 50.6ms TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:58,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8251 states. [2021-07-13 19:11:58,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8251 to 5352. [2021-07-13 19:11:58,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5352 states, 5351 states have (on average 3.834984115118669) internal successors, (20521), 5351 states have internal predecessors, (20521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5352 states to 5352 states and 20521 transitions. [2021-07-13 19:11:58,907 INFO L78 Accepts]: Start accepts. Automaton has 5352 states and 20521 transitions. Word has length 27 [2021-07-13 19:11:58,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:58,907 INFO L482 AbstractCegarLoop]: Abstraction has 5352 states and 20521 transitions. [2021-07-13 19:11:58,907 INFO L483 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) [2021-07-13 19:11:58,907 INFO L276 IsEmpty]: Start isEmpty. Operand 5352 states and 20521 transitions. [2021-07-13 19:11:58,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:11:58,917 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:58,917 INFO L508 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] [2021-07-13 19:11:59,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-07-13 19:11:59,130 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:59,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:59,130 INFO L82 PathProgramCache]: Analyzing trace with hash 888507809, now seen corresponding path program 8 times [2021-07-13 19:11:59,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:59,131 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858328258] [2021-07-13 19:11:59,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:59,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:59,166 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:59,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:59,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858328258] [2021-07-13 19:11:59,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858328258] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:59,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099153358] [2021-07-13 19:11:59,167 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 [2021-07-13 19:11:59,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:59,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:59,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 7 conjunts are in the unsatisfiable core [2021-07-13 19:11:59,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:59,266 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:59,266 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099153358] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:59,266 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:59,266 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 9 [2021-07-13 19:11:59,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19154007] [2021-07-13 19:11:59,267 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:11:59,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:59,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:11:59,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:11:59,267 INFO L87 Difference]: Start difference. First operand 5352 states and 20521 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) [2021-07-13 19:11:59,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:11:59,404 INFO L93 Difference]: Finished difference Result 8299 states and 30586 transitions. [2021-07-13 19:11:59,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-07-13 19:11:59,405 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 [2021-07-13 19:11:59,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:11:59,429 INFO L225 Difference]: With dead ends: 8299 [2021-07-13 19:11:59,429 INFO L226 Difference]: Without dead ends: 7871 [2021-07-13 19:11:59,430 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 79.4ms TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:11:59,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7871 states. [2021-07-13 19:11:59,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7871 to 5590. [2021-07-13 19:11:59,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5590 states, 5589 states have (on average 3.8017534442655214) internal successors, (21248), 5589 states have internal predecessors, (21248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:11:59,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5590 states to 5590 states and 21248 transitions. [2021-07-13 19:11:59,543 INFO L78 Accepts]: Start accepts. Automaton has 5590 states and 21248 transitions. Word has length 27 [2021-07-13 19:11:59,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:11:59,543 INFO L482 AbstractCegarLoop]: Abstraction has 5590 states and 21248 transitions. [2021-07-13 19:11:59,543 INFO L483 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) [2021-07-13 19:11:59,543 INFO L276 IsEmpty]: Start isEmpty. Operand 5590 states and 21248 transitions. [2021-07-13 19:11:59,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:11:59,553 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:11:59,554 INFO L508 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] [2021-07-13 19:11:59,755 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-07-13 19:11:59,755 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:11:59,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:11:59,756 INFO L82 PathProgramCache]: Analyzing trace with hash -1554761067, now seen corresponding path program 2 times [2021-07-13 19:11:59,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:11:59,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307703160] [2021-07-13 19:11:59,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:11:59,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:11:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:11:59,800 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:11:59,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307703160] [2021-07-13 19:11:59,800 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307703160] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:59,800 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1305171632] [2021-07-13 19:11:59,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:11:59,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:11:59,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:11:59,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:11:59,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:11:59,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2021-07-13 19:11:59,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:11:59,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:11:59,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:11:59,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:19, output treesize:12 [2021-07-13 19:11:59,882 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:11:59,882 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1305171632] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:11:59,882 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:11:59,882 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 8 [2021-07-13 19:11:59,882 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781090618] [2021-07-13 19:11:59,883 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-07-13 19:11:59,883 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:11:59,883 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-07-13 19:11:59,883 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2021-07-13 19:11:59,883 INFO L87 Difference]: Start difference. First operand 5590 states and 21248 transitions. Second operand has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:00,016 INFO L93 Difference]: Finished difference Result 5588 states and 20704 transitions. [2021-07-13 19:12:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-07-13 19:12:00,016 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:12:00,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:00,029 INFO L225 Difference]: With dead ends: 5588 [2021-07-13 19:12:00,029 INFO L226 Difference]: Without dead ends: 5117 [2021-07-13 19:12:00,029 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 82.6ms TimeCoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:00,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5117 states. [2021-07-13 19:12:00,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5117 to 4893. [2021-07-13 19:12:00,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4893 states, 4892 states have (on average 3.8068274734260017) internal successors, (18623), 4892 states have internal predecessors, (18623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4893 states to 4893 states and 18623 transitions. [2021-07-13 19:12:00,170 INFO L78 Accepts]: Start accepts. Automaton has 4893 states and 18623 transitions. Word has length 27 [2021-07-13 19:12:00,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:00,170 INFO L482 AbstractCegarLoop]: Abstraction has 4893 states and 18623 transitions. [2021-07-13 19:12:00,170 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.888888888888889) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,170 INFO L276 IsEmpty]: Start isEmpty. Operand 4893 states and 18623 transitions. [2021-07-13 19:12:00,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:12:00,179 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:00,179 INFO L508 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] [2021-07-13 19:12:00,395 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-07-13 19:12:00,395 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:00,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:00,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1455495413, now seen corresponding path program 3 times [2021-07-13 19:12:00,396 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:00,396 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048302647] [2021-07-13 19:12:00,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:00,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:00,471 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:00,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:00,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048302647] [2021-07-13 19:12:00,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048302647] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:00,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303663939] [2021-07-13 19:12:00,471 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 [2021-07-13 19:12:00,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:00,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:00,497 INFO L263 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 11 conjunts are in the unsatisfiable core [2021-07-13 19:12:00,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:00,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:12:00,527 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:12:00,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:12:00,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:12:00,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-13 19:12:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:12:00,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303663939] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:00,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:00,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4] total 9 [2021-07-13 19:12:00,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437676962] [2021-07-13 19:12:00,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:00,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:00,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:00,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:00,555 INFO L87 Difference]: Start difference. First operand 4893 states and 18623 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) [2021-07-13 19:12:00,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:00,737 INFO L93 Difference]: Finished difference Result 5208 states and 19682 transitions. [2021-07-13 19:12:00,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-07-13 19:12:00,737 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 [2021-07-13 19:12:00,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:00,749 INFO L225 Difference]: With dead ends: 5208 [2021-07-13 19:12:00,750 INFO L226 Difference]: Without dead ends: 5208 [2021-07-13 19:12:00,750 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 138.0ms TimeCoverageRelationStatistics Valid=57, Invalid=125, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:00,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5208 states. [2021-07-13 19:12:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5208 to 4755. [2021-07-13 19:12:00,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4755 states, 4754 states have (on average 3.8029028186790073) internal successors, (18079), 4754 states have internal predecessors, (18079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:00,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4755 states to 4755 states and 18079 transitions. [2021-07-13 19:12:00,837 INFO L78 Accepts]: Start accepts. Automaton has 4755 states and 18079 transitions. Word has length 27 [2021-07-13 19:12:00,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:00,837 INFO L482 AbstractCegarLoop]: Abstraction has 4755 states and 18079 transitions. [2021-07-13 19:12:00,837 INFO L483 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) [2021-07-13 19:12:00,837 INFO L276 IsEmpty]: Start isEmpty. Operand 4755 states and 18079 transitions. [2021-07-13 19:12:00,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-07-13 19:12:00,846 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:00,846 INFO L508 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] [2021-07-13 19:12:01,063 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-07-13 19:12:01,063 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:01,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:01,063 INFO L82 PathProgramCache]: Analyzing trace with hash 733903001, now seen corresponding path program 4 times [2021-07-13 19:12:01,063 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:01,063 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158567310] [2021-07-13 19:12:01,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:01,155 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:01,156 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:01,156 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158567310] [2021-07-13 19:12:01,156 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158567310] provided 1 perfect and 0 imperfect interpolant sequences [2021-07-13 19:12:01,156 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-07-13 19:12:01,156 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-07-13 19:12:01,156 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674368645] [2021-07-13 19:12:01,156 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-07-13 19:12:01,156 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:01,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-07-13 19:12:01,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-07-13 19:12:01,157 INFO L87 Difference]: Start difference. First operand 4755 states and 18079 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:01,232 INFO L93 Difference]: Finished difference Result 4613 states and 17475 transitions. [2021-07-13 19:12:01,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-07-13 19:12:01,233 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-07-13 19:12:01,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:01,243 INFO L225 Difference]: With dead ends: 4613 [2021-07-13 19:12:01,243 INFO L226 Difference]: Without dead ends: 4453 [2021-07-13 19:12:01,244 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 77.4ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-07-13 19:12:01,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4453 states. [2021-07-13 19:12:01,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4453 to 4453. [2021-07-13 19:12:01,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4453 states, 4452 states have (on average 3.8313117699910153) internal successors, (17057), 4452 states have internal predecessors, (17057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4453 states to 4453 states and 17057 transitions. [2021-07-13 19:12:01,318 INFO L78 Accepts]: Start accepts. Automaton has 4453 states and 17057 transitions. Word has length 27 [2021-07-13 19:12:01,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:01,318 INFO L482 AbstractCegarLoop]: Abstraction has 4453 states and 17057 transitions. [2021-07-13 19:12:01,318 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 5 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:01,318 INFO L276 IsEmpty]: Start isEmpty. Operand 4453 states and 17057 transitions. [2021-07-13 19:12:01,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:01,326 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:01,326 INFO L508 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] [2021-07-13 19:12:01,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2021-07-13 19:12:01,326 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:01,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:01,327 INFO L82 PathProgramCache]: Analyzing trace with hash -393228176, now seen corresponding path program 9 times [2021-07-13 19:12:01,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:01,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308879293] [2021-07-13 19:12:01,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:01,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:01,372 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:01,372 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308879293] [2021-07-13 19:12:01,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308879293] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:01,372 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094462318] [2021-07-13 19:12:01,372 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 [2021-07-13 19:12:01,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:12:01,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:01,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:01,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:01,576 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-07-13 19:12:01,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094462318] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:01,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:01,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:12:01,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656932637] [2021-07-13 19:12:01,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:12:01,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:01,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:12:01,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:01,577 INFO L87 Difference]: Start difference. First operand 4453 states and 17057 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) [2021-07-13 19:12:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:02,644 INFO L93 Difference]: Finished difference Result 18250 states and 67488 transitions. [2021-07-13 19:12:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-07-13 19:12:02,644 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 [2021-07-13 19:12:02,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:02,701 INFO L225 Difference]: With dead ends: 18250 [2021-07-13 19:12:02,701 INFO L226 Difference]: Without dead ends: 17714 [2021-07-13 19:12:02,701 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 513.1ms TimeCoverageRelationStatistics Valid=373, Invalid=1433, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:12:02,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17714 states. [2021-07-13 19:12:03,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17714 to 11055. [2021-07-13 19:12:03,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11055 states, 11054 states have (on average 4.028586936855437) internal successors, (44532), 11054 states have internal predecessors, (44532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:03,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11055 states to 11055 states and 44532 transitions. [2021-07-13 19:12:03,119 INFO L78 Accepts]: Start accepts. Automaton has 11055 states and 44532 transitions. Word has length 30 [2021-07-13 19:12:03,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:03,119 INFO L482 AbstractCegarLoop]: Abstraction has 11055 states and 44532 transitions. [2021-07-13 19:12:03,119 INFO L483 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) [2021-07-13 19:12:03,119 INFO L276 IsEmpty]: Start isEmpty. Operand 11055 states and 44532 transitions. [2021-07-13 19:12:03,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:03,141 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:03,141 INFO L508 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] [2021-07-13 19:12:03,358 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:03,358 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:03,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:03,358 INFO L82 PathProgramCache]: Analyzing trace with hash 1496580308, now seen corresponding path program 10 times [2021-07-13 19:12:03,358 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:03,358 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724143276] [2021-07-13 19:12:03,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:03,400 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:03,400 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:03,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724143276] [2021-07-13 19:12:03,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724143276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:03,400 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409826762] [2021-07-13 19:12:03,400 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 [2021-07-13 19:12:03,428 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:03,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:03,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:12:03,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:03,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:12:03,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:12:03,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:12:03,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:12:03,533 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-13 19:12:03,555 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:03,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409826762] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:03,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:03,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:12:03,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587365259] [2021-07-13 19:12:03,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:12:03,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:03,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:12:03,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:03,556 INFO L87 Difference]: Start difference. First operand 11055 states and 44532 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) [2021-07-13 19:12:05,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:05,397 INFO L93 Difference]: Finished difference Result 23408 states and 90037 transitions. [2021-07-13 19:12:05,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:12:05,398 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 [2021-07-13 19:12:05,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:05,479 INFO L225 Difference]: With dead ends: 23408 [2021-07-13 19:12:05,480 INFO L226 Difference]: Without dead ends: 22853 [2021-07-13 19:12:05,480 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 857.7ms TimeCoverageRelationStatistics Valid=393, Invalid=1959, Unknown=0, NotChecked=0, Total=2352 [2021-07-13 19:12:05,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22853 states. [2021-07-13 19:12:05,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22853 to 15842. [2021-07-13 19:12:05,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15842 states, 15841 states have (on average 4.061738526608169) internal successors, (64342), 15841 states have internal predecessors, (64342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:05,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15842 states to 15842 states and 64342 transitions. [2021-07-13 19:12:05,995 INFO L78 Accepts]: Start accepts. Automaton has 15842 states and 64342 transitions. Word has length 30 [2021-07-13 19:12:05,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:05,997 INFO L482 AbstractCegarLoop]: Abstraction has 15842 states and 64342 transitions. [2021-07-13 19:12:05,997 INFO L483 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) [2021-07-13 19:12:05,997 INFO L276 IsEmpty]: Start isEmpty. Operand 15842 states and 64342 transitions. [2021-07-13 19:12:06,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:06,035 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:06,036 INFO L508 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] [2021-07-13 19:12:06,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-07-13 19:12:06,237 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:06,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:06,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1834270364, now seen corresponding path program 11 times [2021-07-13 19:12:06,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:06,238 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334657553] [2021-07-13 19:12:06,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:06,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:06,278 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:06,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:06,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334657553] [2021-07-13 19:12:06,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334657553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:06,279 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869317348] [2021-07-13 19:12:06,279 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-07-13 19:12:06,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:12:06,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:06,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:06,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:06,441 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:06,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869317348] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:06,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:06,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-07-13 19:12:06,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909579271] [2021-07-13 19:12:06,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:12:06,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:06,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:12:06,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:12:06,442 INFO L87 Difference]: Start difference. First operand 15842 states and 64342 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) [2021-07-13 19:12:06,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:06,789 INFO L93 Difference]: Finished difference Result 23804 states and 95370 transitions. [2021-07-13 19:12:06,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-07-13 19:12:06,790 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 [2021-07-13 19:12:06,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:06,873 INFO L225 Difference]: With dead ends: 23804 [2021-07-13 19:12:06,873 INFO L226 Difference]: Without dead ends: 23752 [2021-07-13 19:12:06,873 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 97.7ms TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:12:06,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23752 states. [2021-07-13 19:12:07,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23752 to 16213. [2021-07-13 19:12:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16213 states, 16212 states have (on average 4.060880829015544) internal successors, (65835), 16212 states have internal predecessors, (65835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:07,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16213 states to 16213 states and 65835 transitions. [2021-07-13 19:12:07,681 INFO L78 Accepts]: Start accepts. Automaton has 16213 states and 65835 transitions. Word has length 30 [2021-07-13 19:12:07,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:07,682 INFO L482 AbstractCegarLoop]: Abstraction has 16213 states and 65835 transitions. [2021-07-13 19:12:07,682 INFO L483 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) [2021-07-13 19:12:07,682 INFO L276 IsEmpty]: Start isEmpty. Operand 16213 states and 65835 transitions. [2021-07-13 19:12:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:07,724 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:07,724 INFO L508 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] [2021-07-13 19:12:07,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-07-13 19:12:07,941 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:07,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:07,942 INFO L82 PathProgramCache]: Analyzing trace with hash 1212389954, now seen corresponding path program 12 times [2021-07-13 19:12:07,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:07,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173538645] [2021-07-13 19:12:07,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:08,075 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:08,075 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173538645] [2021-07-13 19:12:08,075 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173538645] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:08,075 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79864117] [2021-07-13 19:12:08,075 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:08,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:12:08,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:08,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:08,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:08,188 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:12:08,188 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79864117] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:08,188 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:08,188 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-07-13 19:12:08,188 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1409124727] [2021-07-13 19:12:08,188 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:08,188 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:08,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:08,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:08,189 INFO L87 Difference]: Start difference. First operand 16213 states and 65835 transitions. Second operand has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:08,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:08,786 INFO L93 Difference]: Finished difference Result 31221 states and 123338 transitions. [2021-07-13 19:12:08,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-07-13 19:12:08,786 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:12:08,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:08,933 INFO L225 Difference]: With dead ends: 31221 [2021-07-13 19:12:08,933 INFO L226 Difference]: Without dead ends: 30782 [2021-07-13 19:12:08,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=151, Invalid=355, Unknown=0, NotChecked=0, Total=506 [2021-07-13 19:12:08,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30782 states. [2021-07-13 19:12:09,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30782 to 23744. [2021-07-13 19:12:09,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23744 states, 23743 states have (on average 4.117634671271532) internal successors, (97765), 23743 states have internal predecessors, (97765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:09,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23744 states to 23744 states and 97765 transitions. [2021-07-13 19:12:09,848 INFO L78 Accepts]: Start accepts. Automaton has 23744 states and 97765 transitions. Word has length 30 [2021-07-13 19:12:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:09,848 INFO L482 AbstractCegarLoop]: Abstraction has 23744 states and 97765 transitions. [2021-07-13 19:12:09,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.3076923076923075) internal successors, (56), 12 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:09,849 INFO L276 IsEmpty]: Start isEmpty. Operand 23744 states and 97765 transitions. [2021-07-13 19:12:09,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:09,901 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:09,901 INFO L508 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] [2021-07-13 19:12:10,106 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:10,107 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:10,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:10,107 INFO L82 PathProgramCache]: Analyzing trace with hash -977561994, now seen corresponding path program 13 times [2021-07-13 19:12:10,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:10,107 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531653092] [2021-07-13 19:12:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:10,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:10,294 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:10,294 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:10,294 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531653092] [2021-07-13 19:12:10,294 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531653092] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:10,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317200928] [2021-07-13 19:12:10,295 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:10,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:12:10,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:10,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:12:10,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:12:10,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:12:10,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:12:10,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-13 19:12:10,470 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:10,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317200928] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:10,471 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:10,471 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:12:10,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456695120] [2021-07-13 19:12:10,471 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:12:10,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:10,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:12:10,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:10,472 INFO L87 Difference]: Start difference. First operand 23744 states and 97765 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) [2021-07-13 19:12:11,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:11,731 INFO L93 Difference]: Finished difference Result 35138 states and 142210 transitions. [2021-07-13 19:12:11,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:12:11,731 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 [2021-07-13 19:12:11,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:11,910 INFO L225 Difference]: With dead ends: 35138 [2021-07-13 19:12:11,910 INFO L226 Difference]: Without dead ends: 34623 [2021-07-13 19:12:11,911 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=162, Invalid=960, Unknown=0, NotChecked=0, Total=1122 [2021-07-13 19:12:11,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34623 states. [2021-07-13 19:12:12,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34623 to 25637. [2021-07-13 19:12:12,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25637 states, 25636 states have (on average 4.109065376813856) internal successors, (105340), 25636 states have internal predecessors, (105340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:12,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25637 states to 25637 states and 105340 transitions. [2021-07-13 19:12:12,843 INFO L78 Accepts]: Start accepts. Automaton has 25637 states and 105340 transitions. Word has length 30 [2021-07-13 19:12:12,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:12,843 INFO L482 AbstractCegarLoop]: Abstraction has 25637 states and 105340 transitions. [2021-07-13 19:12:12,843 INFO L483 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) [2021-07-13 19:12:12,843 INFO L276 IsEmpty]: Start isEmpty. Operand 25637 states and 105340 transitions. [2021-07-13 19:12:13,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:13,103 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:13,103 INFO L508 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] [2021-07-13 19:12:13,320 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-07-13 19:12:13,320 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:13,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:13,320 INFO L82 PathProgramCache]: Analyzing trace with hash 986277488, now seen corresponding path program 14 times [2021-07-13 19:12:13,320 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:13,320 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1786631574] [2021-07-13 19:12:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:13,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:13,366 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:13,366 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:13,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1786631574] [2021-07-13 19:12:13,366 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1786631574] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:13,366 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047436226] [2021-07-13 19:12:13,367 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:13,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:13,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:12:13,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:13,488 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:13,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047436226] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:13,489 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:13,489 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 19:12:13,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018488803] [2021-07-13 19:12:13,489 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:13,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:13,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:13,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:13,490 INFO L87 Difference]: Start difference. First operand 25637 states and 105340 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) [2021-07-13 19:12:14,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:14,464 INFO L93 Difference]: Finished difference Result 51004 states and 204742 transitions. [2021-07-13 19:12:14,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:12:14,464 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 [2021-07-13 19:12:14,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:14,933 INFO L225 Difference]: With dead ends: 51004 [2021-07-13 19:12:14,933 INFO L226 Difference]: Without dead ends: 50772 [2021-07-13 19:12:14,933 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 207.7ms TimeCoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2021-07-13 19:12:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50772 states. [2021-07-13 19:12:16,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50772 to 38308. [2021-07-13 19:12:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38308 states, 38307 states have (on average 4.208395332445767) internal successors, (161211), 38307 states have internal predecessors, (161211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:16,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38308 states to 38308 states and 161211 transitions. [2021-07-13 19:12:16,901 INFO L78 Accepts]: Start accepts. Automaton has 38308 states and 161211 transitions. Word has length 30 [2021-07-13 19:12:16,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:16,901 INFO L482 AbstractCegarLoop]: Abstraction has 38308 states and 161211 transitions. [2021-07-13 19:12:16,901 INFO L483 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) [2021-07-13 19:12:16,901 INFO L276 IsEmpty]: Start isEmpty. Operand 38308 states and 161211 transitions. [2021-07-13 19:12:16,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:16,983 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:16,983 INFO L508 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] [2021-07-13 19:12:17,196 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:17,197 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:17,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:17,197 INFO L82 PathProgramCache]: Analyzing trace with hash 1014935730, now seen corresponding path program 15 times [2021-07-13 19:12:17,197 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:17,197 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571126158] [2021-07-13 19:12:17,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:17,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:17,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:17,258 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:17,258 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571126158] [2021-07-13 19:12:17,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [571126158] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:17,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969661894] [2021-07-13 19:12:17,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:17,306 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:12:17,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:17,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:12:17,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:17,391 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:17,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969661894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:17,391 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:17,391 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 11 [2021-07-13 19:12:17,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509506476] [2021-07-13 19:12:17,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:12:17,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:17,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:12:17,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:12:17,392 INFO L87 Difference]: Start difference. First operand 38308 states and 161211 transitions. Second operand has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-07-13 19:12:18,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:18,261 INFO L93 Difference]: Finished difference Result 45696 states and 184859 transitions. [2021-07-13 19:12:18,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:12:18,261 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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 [2021-07-13 19:12:18,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:18,465 INFO L225 Difference]: With dead ends: 45696 [2021-07-13 19:12:18,465 INFO L226 Difference]: Without dead ends: 45550 [2021-07-13 19:12:18,466 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:18,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45550 states. [2021-07-13 19:12:20,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45550 to 38454. [2021-07-13 19:12:20,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38454 states, 38453 states have (on average 4.205341585832055) internal successors, (161708), 38453 states have internal predecessors, (161708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:20,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38454 states to 38454 states and 161708 transitions. [2021-07-13 19:12:20,261 INFO L78 Accepts]: Start accepts. Automaton has 38454 states and 161708 transitions. Word has length 30 [2021-07-13 19:12:20,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:20,261 INFO L482 AbstractCegarLoop]: Abstraction has 38454 states and 161708 transitions. [2021-07-13 19:12:20,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 4.166666666666667) internal successors, (50), 11 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) [2021-07-13 19:12:20,261 INFO L276 IsEmpty]: Start isEmpty. Operand 38454 states and 161708 transitions. [2021-07-13 19:12:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:20,339 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:20,339 INFO L508 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] [2021-07-13 19:12:20,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-07-13 19:12:20,553 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:20,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:20,553 INFO L82 PathProgramCache]: Analyzing trace with hash -1343876520, now seen corresponding path program 16 times [2021-07-13 19:12:20,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:20,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137553553] [2021-07-13 19:12:20,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:20,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:20,597 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:20,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137553553] [2021-07-13 19:12:20,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137553553] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:20,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720675059] [2021-07-13 19:12:20,598 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:20,630 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:12:20,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:20,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:12:20,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:20,910 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:12:20,912 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:12:20,916 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:12:20,917 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:12:20,917 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-13 19:12:20,945 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:20,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1720675059] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:20,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:20,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-13 19:12:20,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543923975] [2021-07-13 19:12:20,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:20,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:20,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:20,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:20,948 INFO L87 Difference]: Start difference. First operand 38454 states and 161708 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) [2021-07-13 19:12:22,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:22,727 INFO L93 Difference]: Finished difference Result 55267 states and 223349 transitions. [2021-07-13 19:12:22,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:12:22,728 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 [2021-07-13 19:12:22,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:23,136 INFO L225 Difference]: With dead ends: 55267 [2021-07-13 19:12:23,137 INFO L226 Difference]: Without dead ends: 54596 [2021-07-13 19:12:23,137 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 681.5ms TimeCoverageRelationStatistics Valid=316, Invalid=1664, Unknown=0, NotChecked=0, Total=1980 [2021-07-13 19:12:23,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54596 states. [2021-07-13 19:12:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54596 to 41454. [2021-07-13 19:12:24,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41454 states, 41453 states have (on average 4.203965937326611) internal successors, (174267), 41453 states have internal predecessors, (174267), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:24,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41454 states to 41454 states and 174267 transitions. [2021-07-13 19:12:24,676 INFO L78 Accepts]: Start accepts. Automaton has 41454 states and 174267 transitions. Word has length 30 [2021-07-13 19:12:24,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:24,677 INFO L482 AbstractCegarLoop]: Abstraction has 41454 states and 174267 transitions. [2021-07-13 19:12:24,677 INFO L483 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) [2021-07-13 19:12:24,677 INFO L276 IsEmpty]: Start isEmpty. Operand 41454 states and 174267 transitions. [2021-07-13 19:12:25,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:25,027 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:25,027 INFO L508 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] [2021-07-13 19:12:25,240 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-07-13 19:12:25,241 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:25,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:25,241 INFO L82 PathProgramCache]: Analyzing trace with hash -1685032968, now seen corresponding path program 1 times [2021-07-13 19:12:25,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:25,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768714894] [2021-07-13 19:12:25,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:25,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:25,313 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:25,313 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:25,313 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768714894] [2021-07-13 19:12:25,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768714894] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320779696] [2021-07-13 19:12:25,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:25,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:25,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:12:25,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:25,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:25,514 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320779696] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:25,514 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:25,514 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-13 19:12:25,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490398843] [2021-07-13 19:12:25,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:12:25,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:25,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:12:25,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:12:25,515 INFO L87 Difference]: Start difference. First operand 41454 states and 174267 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) [2021-07-13 19:12:26,545 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 24 [2021-07-13 19:12:27,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:27,576 INFO L93 Difference]: Finished difference Result 56968 states and 227845 transitions. [2021-07-13 19:12:27,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-07-13 19:12:27,576 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 [2021-07-13 19:12:27,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:27,830 INFO L225 Difference]: With dead ends: 56968 [2021-07-13 19:12:27,831 INFO L226 Difference]: Without dead ends: 56506 [2021-07-13 19:12:27,831 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 447 ImplicationChecksByTransitivity, 897.9ms TimeCoverageRelationStatistics Valid=315, Invalid=1577, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:12:27,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56506 states. [2021-07-13 19:12:29,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56506 to 42332. [2021-07-13 19:12:29,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42332 states, 42331 states have (on average 4.198270770829888) internal successors, (177717), 42331 states have internal predecessors, (177717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:29,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42332 states to 42332 states and 177717 transitions. [2021-07-13 19:12:29,861 INFO L78 Accepts]: Start accepts. Automaton has 42332 states and 177717 transitions. Word has length 30 [2021-07-13 19:12:29,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:29,861 INFO L482 AbstractCegarLoop]: Abstraction has 42332 states and 177717 transitions. [2021-07-13 19:12:29,861 INFO L483 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) [2021-07-13 19:12:29,861 INFO L276 IsEmpty]: Start isEmpty. Operand 42332 states and 177717 transitions. [2021-07-13 19:12:29,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:29,949 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:29,949 INFO L508 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] [2021-07-13 19:12:30,165 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-07-13 19:12:30,165 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:30,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:30,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1292896282, now seen corresponding path program 17 times [2021-07-13 19:12:30,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:30,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841176774] [2021-07-13 19:12:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:30,227 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:30,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:30,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841176774] [2021-07-13 19:12:30,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841176774] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170578718] [2021-07-13 19:12:30,228 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 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 [2021-07-13 19:12:30,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:12:30,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:30,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:30,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:30,378 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:30,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170578718] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:30,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:30,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-07-13 19:12:30,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843593328] [2021-07-13 19:12:30,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-07-13 19:12:30,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:30,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-07-13 19:12:30,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-07-13 19:12:30,380 INFO L87 Difference]: Start difference. First operand 42332 states and 177717 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) [2021-07-13 19:12:31,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:31,326 INFO L93 Difference]: Finished difference Result 52680 states and 212917 transitions. [2021-07-13 19:12:31,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-07-13 19:12:31,326 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 30 [2021-07-13 19:12:31,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:31,598 INFO L225 Difference]: With dead ends: 52680 [2021-07-13 19:12:31,598 INFO L226 Difference]: Without dead ends: 52640 [2021-07-13 19:12:31,599 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 139.6ms TimeCoverageRelationStatistics Valid=86, Invalid=220, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:12:31,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52640 states. [2021-07-13 19:12:32,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52640 to 42878. [2021-07-13 19:12:33,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42878 states, 42877 states have (on average 4.208503393427712) internal successors, (180448), 42877 states have internal predecessors, (180448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42878 states to 42878 states and 180448 transitions. [2021-07-13 19:12:33,395 INFO L78 Accepts]: Start accepts. Automaton has 42878 states and 180448 transitions. Word has length 30 [2021-07-13 19:12:33,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:33,396 INFO L482 AbstractCegarLoop]: Abstraction has 42878 states and 180448 transitions. [2021-07-13 19:12:33,396 INFO L483 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) [2021-07-13 19:12:33,396 INFO L276 IsEmpty]: Start isEmpty. Operand 42878 states and 180448 transitions. [2021-07-13 19:12:33,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:33,501 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:33,501 INFO L508 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] [2021-07-13 19:12:33,717 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-07-13 19:12:33,718 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash -655817088, now seen corresponding path program 18 times [2021-07-13 19:12:33,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:33,718 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669110097] [2021-07-13 19:12:33,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:33,780 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:33,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:33,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669110097] [2021-07-13 19:12:33,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669110097] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339985424] [2021-07-13 19:12:33,780 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 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 [2021-07-13 19:12:33,825 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:12:33,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:33,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:12:33,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:33,924 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:12:33,924 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [339985424] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:33,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:33,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-13 19:12:33,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460352206] [2021-07-13 19:12:33,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:33,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:33,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:33,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:33,926 INFO L87 Difference]: Start difference. First operand 42878 states and 180448 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) [2021-07-13 19:12:35,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:35,582 INFO L93 Difference]: Finished difference Result 93945 states and 386209 transitions. [2021-07-13 19:12:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-07-13 19:12:35,591 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 [2021-07-13 19:12:35,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:36,037 INFO L225 Difference]: With dead ends: 93945 [2021-07-13 19:12:36,038 INFO L226 Difference]: Without dead ends: 92826 [2021-07-13 19:12:36,038 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=251, Invalid=619, Unknown=0, NotChecked=0, Total=870 [2021-07-13 19:12:36,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92826 states. [2021-07-13 19:12:38,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92826 to 70922. [2021-07-13 19:12:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70922 states, 70921 states have (on average 4.303647720703318) internal successors, (305219), 70921 states have internal predecessors, (305219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:39,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70922 states to 70922 states and 305219 transitions. [2021-07-13 19:12:39,331 INFO L78 Accepts]: Start accepts. Automaton has 70922 states and 305219 transitions. Word has length 30 [2021-07-13 19:12:39,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:39,331 INFO L482 AbstractCegarLoop]: Abstraction has 70922 states and 305219 transitions. [2021-07-13 19:12:39,331 INFO L483 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) [2021-07-13 19:12:39,331 INFO L276 IsEmpty]: Start isEmpty. Operand 70922 states and 305219 transitions. [2021-07-13 19:12:39,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:39,786 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:39,786 INFO L508 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] [2021-07-13 19:12:40,001 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:40,001 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:40,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:40,001 INFO L82 PathProgramCache]: Analyzing trace with hash 882971354, now seen corresponding path program 19 times [2021-07-13 19:12:40,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:40,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233146361] [2021-07-13 19:12:40,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:40,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:40,042 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:40,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:40,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233146361] [2021-07-13 19:12:40,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233146361] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416451482] [2021-07-13 19:12:40,043 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 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 [2021-07-13 19:12:40,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:40,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:12:40,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:40,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:12:40,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:12:40,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:12:40,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:12:40,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-13 19:12:40,191 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:40,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1416451482] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:40,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:40,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:12:40,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983101101] [2021-07-13 19:12:40,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:12:40,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:40,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:12:40,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:12:40,192 INFO L87 Difference]: Start difference. First operand 70922 states and 305219 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) [2021-07-13 19:12:41,235 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2021-07-13 19:12:42,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:42,562 INFO L93 Difference]: Finished difference Result 91994 states and 383695 transitions. [2021-07-13 19:12:42,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-07-13 19:12:42,563 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 [2021-07-13 19:12:42,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:42,984 INFO L225 Difference]: With dead ends: 91994 [2021-07-13 19:12:42,985 INFO L226 Difference]: Without dead ends: 91128 [2021-07-13 19:12:42,985 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 905.2ms TimeCoverageRelationStatistics Valid=406, Invalid=2044, Unknown=0, NotChecked=0, Total=2450 [2021-07-13 19:12:43,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91128 states. [2021-07-13 19:12:45,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91128 to 75370. [2021-07-13 19:12:45,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75370 states, 75369 states have (on average 4.307619843702318) internal successors, (324661), 75369 states have internal predecessors, (324661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:46,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75370 states to 75370 states and 324661 transitions. [2021-07-13 19:12:46,551 INFO L78 Accepts]: Start accepts. Automaton has 75370 states and 324661 transitions. Word has length 30 [2021-07-13 19:12:46,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:46,551 INFO L482 AbstractCegarLoop]: Abstraction has 75370 states and 324661 transitions. [2021-07-13 19:12:46,551 INFO L483 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) [2021-07-13 19:12:46,552 INFO L276 IsEmpty]: Start isEmpty. Operand 75370 states and 324661 transitions. [2021-07-13 19:12:46,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:46,686 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:46,686 INFO L508 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] [2021-07-13 19:12:46,901 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-07-13 19:12:46,901 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:46,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:46,901 INFO L82 PathProgramCache]: Analyzing trace with hash -1475840896, now seen corresponding path program 20 times [2021-07-13 19:12:46,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:46,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670276252] [2021-07-13 19:12:46,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:46,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:46,939 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:46,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:46,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670276252] [2021-07-13 19:12:46,940 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670276252] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:46,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628923406] [2021-07-13 19:12:46,940 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 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 [2021-07-13 19:12:46,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:46,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:46,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:12:46,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:47,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:47,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628923406] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:47,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:47,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 19:12:47,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204817219] [2021-07-13 19:12:47,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:47,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:47,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:47,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:47,058 INFO L87 Difference]: Start difference. First operand 75370 states and 324661 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) [2021-07-13 19:12:48,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:48,265 INFO L93 Difference]: Finished difference Result 98132 states and 416693 transitions. [2021-07-13 19:12:48,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-07-13 19:12:48,266 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 [2021-07-13 19:12:48,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:49,315 INFO L225 Difference]: With dead ends: 98132 [2021-07-13 19:12:49,316 INFO L226 Difference]: Without dead ends: 98068 [2021-07-13 19:12:49,316 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 145.4ms TimeCoverageRelationStatistics Valid=96, Invalid=246, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:12:49,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98068 states. [2021-07-13 19:12:52,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98068 to 90511. [2021-07-13 19:12:52,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90511 states, 90510 states have (on average 4.326869959120539) internal successors, (391625), 90510 states have internal predecessors, (391625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:12:53,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90511 states to 90511 states and 391625 transitions. [2021-07-13 19:12:53,411 INFO L78 Accepts]: Start accepts. Automaton has 90511 states and 391625 transitions. Word has length 30 [2021-07-13 19:12:53,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:12:53,411 INFO L482 AbstractCegarLoop]: Abstraction has 90511 states and 391625 transitions. [2021-07-13 19:12:53,411 INFO L483 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) [2021-07-13 19:12:53,411 INFO L276 IsEmpty]: Start isEmpty. Operand 90511 states and 391625 transitions. [2021-07-13 19:12:53,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:12:53,554 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:12:53,555 INFO L508 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] [2021-07-13 19:12:53,765 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:53,765 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:12:53,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:12:53,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1672971934, now seen corresponding path program 2 times [2021-07-13 19:12:53,766 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:12:53,766 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231528855] [2021-07-13 19:12:53,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:12:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:12:53,834 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:53,834 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:12:53,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231528855] [2021-07-13 19:12:53,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231528855] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,834 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417558043] [2021-07-13 19:12:53,834 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:12:53,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:12:53,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:12:53,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:12:53,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:12:53,975 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:12:53,975 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417558043] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:12:53,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:12:53,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 19:12:53,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176797819] [2021-07-13 19:12:53,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:12:53,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:12:53,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:12:53,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:12:53,977 INFO L87 Difference]: Start difference. First operand 90511 states and 391625 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) [2021-07-13 19:12:55,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:12:55,571 INFO L93 Difference]: Finished difference Result 98511 states and 417660 transitions. [2021-07-13 19:12:55,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-07-13 19:12:55,571 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 [2021-07-13 19:12:55,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:12:56,278 INFO L225 Difference]: With dead ends: 98511 [2021-07-13 19:12:56,278 INFO L226 Difference]: Without dead ends: 98337 [2021-07-13 19:12:56,278 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:12:56,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98337 states. [2021-07-13 19:12:59,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98337 to 90305. [2021-07-13 19:12:59,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90305 states, 90304 states have (on average 4.329077338766832) internal successors, (390933), 90304 states have internal predecessors, (390933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:00,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90305 states to 90305 states and 390933 transitions. [2021-07-13 19:13:00,219 INFO L78 Accepts]: Start accepts. Automaton has 90305 states and 390933 transitions. Word has length 30 [2021-07-13 19:13:00,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:00,219 INFO L482 AbstractCegarLoop]: Abstraction has 90305 states and 390933 transitions. [2021-07-13 19:13:00,219 INFO L483 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) [2021-07-13 19:13:00,219 INFO L276 IsEmpty]: Start isEmpty. Operand 90305 states and 390933 transitions. [2021-07-13 19:13:00,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:13:00,760 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:00,760 INFO L508 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] [2021-07-13 19:13:00,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-07-13 19:13:00,976 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash -776979552, now seen corresponding path program 3 times [2021-07-13 19:13:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:00,977 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045196691] [2021-07-13 19:13:00,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:00,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:01,034 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:01,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:01,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045196691] [2021-07-13 19:13:01,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2045196691] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772105787] [2021-07-13 19:13:01,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:01,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-07-13 19:13:01,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:01,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:13:01,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:01,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772105787] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:01,140 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:01,140 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 11 [2021-07-13 19:13:01,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335236472] [2021-07-13 19:13:01,141 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-07-13 19:13:01,141 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:01,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-07-13 19:13:01,141 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2021-07-13 19:13:01,141 INFO L87 Difference]: Start difference. First operand 90305 states and 390933 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) [2021-07-13 19:13:02,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:02,377 INFO L93 Difference]: Finished difference Result 102107 states and 432585 transitions. [2021-07-13 19:13:02,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-07-13 19:13:02,378 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 [2021-07-13 19:13:02,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:03,217 INFO L225 Difference]: With dead ends: 102107 [2021-07-13 19:13:03,217 INFO L226 Difference]: Without dead ends: 101965 [2021-07-13 19:13:03,217 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=98, Invalid=282, Unknown=0, NotChecked=0, Total=380 [2021-07-13 19:13:03,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101965 states. [2021-07-13 19:13:06,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101965 to 90694. [2021-07-13 19:13:06,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90694 states, 90693 states have (on average 4.332815101496257) internal successors, (392956), 90693 states have internal predecessors, (392956), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90694 states to 90694 states and 392956 transitions. [2021-07-13 19:13:06,815 INFO L78 Accepts]: Start accepts. Automaton has 90694 states and 392956 transitions. Word has length 30 [2021-07-13 19:13:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:06,815 INFO L482 AbstractCegarLoop]: Abstraction has 90694 states and 392956 transitions. [2021-07-13 19:13:06,815 INFO L483 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) [2021-07-13 19:13:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 90694 states and 392956 transitions. [2021-07-13 19:13:07,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:13:07,457 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:07,457 INFO L508 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] [2021-07-13 19:13:07,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-07-13 19:13:07,661 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:07,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:07,661 INFO L82 PathProgramCache]: Analyzing trace with hash -1079688236, now seen corresponding path program 21 times [2021-07-13 19:13:07,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:07,661 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710005301] [2021-07-13 19:13:07,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:07,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:07,715 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:07,715 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:07,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710005301] [2021-07-13 19:13:07,715 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710005301] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:07,715 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472874106] [2021-07-13 19:13:07,715 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 [2021-07-13 19:13:07,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:13:07,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:07,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:07,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:07,889 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-07-13 19:13:07,889 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472874106] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:07,889 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:07,889 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:13:07,889 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850002506] [2021-07-13 19:13:07,889 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:07,889 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:07,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:07,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:07,890 INFO L87 Difference]: Start difference. First operand 90694 states and 392956 transitions. Second operand has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:09,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:09,931 INFO L93 Difference]: Finished difference Result 122868 states and 520265 transitions. [2021-07-13 19:13:09,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-07-13 19:13:09,932 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:13:09,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:10,573 INFO L225 Difference]: With dead ends: 122868 [2021-07-13 19:13:10,574 INFO L226 Difference]: Without dead ends: 120504 [2021-07-13 19:13:10,574 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 412.8ms TimeCoverageRelationStatistics Valid=315, Invalid=875, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:13:10,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120504 states. [2021-07-13 19:13:13,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120504 to 55126. [2021-07-13 19:13:13,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55126 states, 55125 states have (on average 4.2524444444444445) internal successors, (234416), 55125 states have internal predecessors, (234416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55126 states to 55126 states and 234416 transitions. [2021-07-13 19:13:13,736 INFO L78 Accepts]: Start accepts. Automaton has 55126 states and 234416 transitions. Word has length 30 [2021-07-13 19:13:13,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:13,752 INFO L482 AbstractCegarLoop]: Abstraction has 55126 states and 234416 transitions. [2021-07-13 19:13:13,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 4.142857142857143) internal successors, (58), 13 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:13,753 INFO L276 IsEmpty]: Start isEmpty. Operand 55126 states and 234416 transitions. [2021-07-13 19:13:13,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:13:13,859 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:13,859 INFO L508 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] [2021-07-13 19:13:14,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-07-13 19:13:14,073 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:14,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:14,074 INFO L82 PathProgramCache]: Analyzing trace with hash 2002103166, now seen corresponding path program 22 times [2021-07-13 19:13:14,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:14,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031050275] [2021-07-13 19:13:14,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:14,139 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:14,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:14,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031050275] [2021-07-13 19:13:14,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031050275] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:14,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398609379] [2021-07-13 19:13:14,140 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) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:14,180 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:14,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:14,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:14,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:14,266 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:13:14,267 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:13:14,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:13:14,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:13:14,271 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-13 19:13:14,291 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:14,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398609379] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:14,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:14,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-13 19:13:14,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112470220] [2021-07-13 19:13:14,292 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:14,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:14,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:14,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:14,292 INFO L87 Difference]: Start difference. First operand 55126 states and 234416 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) [2021-07-13 19:13:16,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:16,577 INFO L93 Difference]: Finished difference Result 84592 states and 350525 transitions. [2021-07-13 19:13:16,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:13:16,578 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 [2021-07-13 19:13:16,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:17,070 INFO L225 Difference]: With dead ends: 84592 [2021-07-13 19:13:17,070 INFO L226 Difference]: Without dead ends: 83864 [2021-07-13 19:13:17,070 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 732.7ms TimeCoverageRelationStatistics Valid=325, Invalid=1567, Unknown=0, NotChecked=0, Total=1892 [2021-07-13 19:13:17,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83864 states. [2021-07-13 19:13:19,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83864 to 68499. [2021-07-13 19:13:19,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68499 states, 68498 states have (on average 4.276489824520424) internal successors, (292931), 68498 states have internal predecessors, (292931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:20,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68499 states to 68499 states and 292931 transitions. [2021-07-13 19:13:20,599 INFO L78 Accepts]: Start accepts. Automaton has 68499 states and 292931 transitions. Word has length 30 [2021-07-13 19:13:20,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:20,599 INFO L482 AbstractCegarLoop]: Abstraction has 68499 states and 292931 transitions. [2021-07-13 19:13:20,599 INFO L483 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) [2021-07-13 19:13:20,599 INFO L276 IsEmpty]: Start isEmpty. Operand 68499 states and 292931 transitions. [2021-07-13 19:13:20,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:13:20,907 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:20,907 INFO L508 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] [2021-07-13 19:13:21,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,52 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:21,124 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:21,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:21,124 INFO L82 PathProgramCache]: Analyzing trace with hash 543968604, now seen corresponding path program 4 times [2021-07-13 19:13:21,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:21,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170383125] [2021-07-13 19:13:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:21,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:21,198 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:21,198 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:21,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170383125] [2021-07-13 19:13:21,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170383125] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:21,198 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813328326] [2021-07-13 19:13:21,199 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:13:21,280 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:13:21,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:21,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:13:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:21,456 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813328326] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:21,456 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:21,456 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 13 [2021-07-13 19:13:21,456 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095691750] [2021-07-13 19:13:21,457 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:13:21,457 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:21,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:13:21,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:13:21,457 INFO L87 Difference]: Start difference. First operand 68499 states and 292931 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) [2021-07-13 19:13:24,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:24,354 INFO L93 Difference]: Finished difference Result 89398 states and 368677 transitions. [2021-07-13 19:13:24,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-07-13 19:13:24,355 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 [2021-07-13 19:13:24,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:24,878 INFO L225 Difference]: With dead ends: 89398 [2021-07-13 19:13:24,878 INFO L226 Difference]: Without dead ends: 88772 [2021-07-13 19:13:24,878 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1172.5ms TimeCoverageRelationStatistics Valid=307, Invalid=1499, Unknown=0, NotChecked=0, Total=1806 [2021-07-13 19:13:24,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88772 states. [2021-07-13 19:13:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88772 to 70166. [2021-07-13 19:13:27,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70166 states, 70165 states have (on average 4.271944701774389) internal successors, (299741), 70165 states have internal predecessors, (299741), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:28,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70166 states to 70166 states and 299741 transitions. [2021-07-13 19:13:28,106 INFO L78 Accepts]: Start accepts. Automaton has 70166 states and 299741 transitions. Word has length 30 [2021-07-13 19:13:28,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:28,107 INFO L482 AbstractCegarLoop]: Abstraction has 70166 states and 299741 transitions. [2021-07-13 19:13:28,107 INFO L483 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) [2021-07-13 19:13:28,107 INFO L276 IsEmpty]: Start isEmpty. Operand 70166 states and 299741 transitions. [2021-07-13 19:13:28,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:13:28,265 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:28,265 INFO L508 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] [2021-07-13 19:13:28,481 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:28,481 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:28,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:28,481 INFO L82 PathProgramCache]: Analyzing trace with hash -967659738, now seen corresponding path program 23 times [2021-07-13 19:13:28,481 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:28,481 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926697011] [2021-07-13 19:13:28,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:28,535 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:28,536 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926697011] [2021-07-13 19:13:28,536 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926697011] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:28,536 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2076670599] [2021-07-13 19:13:28,536 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:28,562 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-07-13 19:13:28,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:28,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:28,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:28,641 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:28,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2076670599] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:28,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:28,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 10 [2021-07-13 19:13:28,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282847134] [2021-07-13 19:13:28,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-07-13 19:13:28,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:28,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-07-13 19:13:28,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-07-13 19:13:28,642 INFO L87 Difference]: Start difference. First operand 70166 states and 299741 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) [2021-07-13 19:13:30,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:30,208 INFO L93 Difference]: Finished difference Result 107773 states and 448693 transitions. [2021-07-13 19:13:30,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-07-13 19:13:30,209 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 [2021-07-13 19:13:30,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:31,020 INFO L225 Difference]: With dead ends: 107773 [2021-07-13 19:13:31,021 INFO L226 Difference]: Without dead ends: 107773 [2021-07-13 19:13:31,021 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 255.4ms TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:13:31,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107773 states. [2021-07-13 19:13:34,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107773 to 85136. [2021-07-13 19:13:34,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85136 states, 85135 states have (on average 4.30706524930992) internal successors, (366682), 85135 states have internal predecessors, (366682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:35,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85136 states to 85136 states and 366682 transitions. [2021-07-13 19:13:35,195 INFO L78 Accepts]: Start accepts. Automaton has 85136 states and 366682 transitions. Word has length 30 [2021-07-13 19:13:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:35,195 INFO L482 AbstractCegarLoop]: Abstraction has 85136 states and 366682 transitions. [2021-07-13 19:13:35,195 INFO L483 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) [2021-07-13 19:13:35,195 INFO L276 IsEmpty]: Start isEmpty. Operand 85136 states and 366682 transitions. [2021-07-13 19:13:35,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:13:35,438 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:35,438 INFO L508 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] [2021-07-13 19:13:35,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-07-13 19:13:35,655 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:35,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:35,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1634397388, now seen corresponding path program 24 times [2021-07-13 19:13:35,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:35,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647256572] [2021-07-13 19:13:35,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:35,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:35,719 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:35,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:35,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647256572] [2021-07-13 19:13:35,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647256572] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:35,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74120123] [2021-07-13 19:13:35,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:35,765 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:13:35,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:35,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:35,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:35,876 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:13:35,876 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74120123] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:35,876 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:35,876 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 12 [2021-07-13 19:13:35,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662087963] [2021-07-13 19:13:35,877 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:35,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:35,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:35,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:35,877 INFO L87 Difference]: Start difference. First operand 85136 states and 366682 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) [2021-07-13 19:13:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:38,461 INFO L93 Difference]: Finished difference Result 136874 states and 574741 transitions. [2021-07-13 19:13:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-07-13 19:13:38,462 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 [2021-07-13 19:13:38,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:39,525 INFO L225 Difference]: With dead ends: 136874 [2021-07-13 19:13:39,525 INFO L226 Difference]: Without dead ends: 135508 [2021-07-13 19:13:39,525 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 383 ImplicationChecksByTransitivity, 513.9ms TimeCoverageRelationStatistics Valid=373, Invalid=1187, Unknown=0, NotChecked=0, Total=1560 [2021-07-13 19:13:39,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135508 states. [2021-07-13 19:13:42,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135508 to 93986. [2021-07-13 19:13:43,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93986 states, 93985 states have (on average 4.333212746714901) internal successors, (407257), 93985 states have internal predecessors, (407257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93986 states to 93986 states and 407257 transitions. [2021-07-13 19:13:44,168 INFO L78 Accepts]: Start accepts. Automaton has 93986 states and 407257 transitions. Word has length 30 [2021-07-13 19:13:44,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:44,168 INFO L482 AbstractCegarLoop]: Abstraction has 93986 states and 407257 transitions. [2021-07-13 19:13:44,168 INFO L483 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) [2021-07-13 19:13:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 93986 states and 407257 transitions. [2021-07-13 19:13:44,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:13:44,433 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:44,433 INFO L508 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] [2021-07-13 19:13:44,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-07-13 19:13:44,649 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:44,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:44,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1685858338, now seen corresponding path program 25 times [2021-07-13 19:13:44,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:44,649 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601687154] [2021-07-13 19:13:44,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:44,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:44,684 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:44,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601687154] [2021-07-13 19:13:44,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601687154] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:44,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [74072065] [2021-07-13 19:13:44,685 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:44,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:44,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:13:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:44,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2021-07-13 19:13:44,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:13:44,812 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:13:44,812 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:13:44,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-13 19:13:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:44,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [74072065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:44,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:44,834 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:13:44,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034136459] [2021-07-13 19:13:44,834 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:13:44,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:44,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:13:44,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:13:44,835 INFO L87 Difference]: Start difference. First operand 93986 states and 407257 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) [2021-07-13 19:13:48,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:48,005 INFO L93 Difference]: Finished difference Result 122538 states and 522164 transitions. [2021-07-13 19:13:48,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-07-13 19:13:48,006 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 [2021-07-13 19:13:48,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:48,708 INFO L225 Difference]: With dead ends: 122538 [2021-07-13 19:13:48,708 INFO L226 Difference]: Without dead ends: 122036 [2021-07-13 19:13:48,708 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 771.3ms TimeCoverageRelationStatistics Valid=377, Invalid=1785, Unknown=0, NotChecked=0, Total=2162 [2021-07-13 19:13:48,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122036 states. [2021-07-13 19:13:52,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122036 to 107696. [2021-07-13 19:13:52,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107696 states, 107695 states have (on average 4.352569757184642) internal successors, (468750), 107695 states have internal predecessors, (468750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:13:53,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107696 states to 107696 states and 468750 transitions. [2021-07-13 19:13:53,501 INFO L78 Accepts]: Start accepts. Automaton has 107696 states and 468750 transitions. Word has length 30 [2021-07-13 19:13:53,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:13:53,501 INFO L482 AbstractCegarLoop]: Abstraction has 107696 states and 468750 transitions. [2021-07-13 19:13:53,501 INFO L483 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) [2021-07-13 19:13:53,501 INFO L276 IsEmpty]: Start isEmpty. Operand 107696 states and 468750 transitions. [2021-07-13 19:13:53,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:13:53,709 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:13:53,709 INFO L508 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] [2021-07-13 19:13:53,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:13:53,925 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:13:53,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:13:53,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1718530562, now seen corresponding path program 5 times [2021-07-13 19:13:53,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:13:53,926 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079288065] [2021-07-13 19:13:53,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:13:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:13:53,990 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:53,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:13:53,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079288065] [2021-07-13 19:13:53,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079288065] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:53,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791553369] [2021-07-13 19:13:53,991 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 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 [2021-07-13 19:13:54,016 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:13:54,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:13:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:13:54,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:13:54,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 7 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:13:54,525 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791553369] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:13:54,525 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:13:54,525 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 19:13:54,525 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725183466] [2021-07-13 19:13:54,526 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:13:54,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:13:54,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:13:54,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:13:54,526 INFO L87 Difference]: Start difference. First operand 107696 states and 468750 transitions. Second operand has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-07-13 19:13:56,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:13:56,935 INFO L93 Difference]: Finished difference Result 152595 states and 646553 transitions. [2021-07-13 19:13:56,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-07-13 19:13:56,935 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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 [2021-07-13 19:13:56,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:13:57,799 INFO L225 Difference]: With dead ends: 152595 [2021-07-13 19:13:57,799 INFO L226 Difference]: Without dead ends: 152595 [2021-07-13 19:13:57,799 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 696.1ms TimeCoverageRelationStatistics Valid=271, Invalid=659, Unknown=0, NotChecked=0, Total=930 [2021-07-13 19:13:58,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152595 states. [2021-07-13 19:14:02,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152595 to 126512. [2021-07-13 19:14:02,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126512 states, 126511 states have (on average 4.371912323829548) internal successors, (553095), 126511 states have internal predecessors, (553095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:03,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126512 states to 126512 states and 553095 transitions. [2021-07-13 19:14:03,786 INFO L78 Accepts]: Start accepts. Automaton has 126512 states and 553095 transitions. Word has length 30 [2021-07-13 19:14:03,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:03,786 INFO L482 AbstractCegarLoop]: Abstraction has 126512 states and 553095 transitions. [2021-07-13 19:14:03,786 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 3.3846153846153846) internal successors, (44), 12 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) [2021-07-13 19:14:03,787 INFO L276 IsEmpty]: Start isEmpty. Operand 126512 states and 553095 transitions. [2021-07-13 19:14:04,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:14:04,083 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:04,083 INFO L508 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] [2021-07-13 19:14:04,296 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-07-13 19:14:04,297 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:04,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:04,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1840643646, now seen corresponding path program 26 times [2021-07-13 19:14:04,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:04,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602843375] [2021-07-13 19:14:04,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:04,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:04,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:04,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:04,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602843375] [2021-07-13 19:14:04,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1602843375] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261292429] [2021-07-13 19:14:04,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:04,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:14:04,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:04,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:04,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:04,494 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:04,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [261292429] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:04,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:04,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:04,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574391584] [2021-07-13 19:14:04,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:04,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:04,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:04,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:04,495 INFO L87 Difference]: Start difference. First operand 126512 states and 553095 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:06,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:06,496 INFO L93 Difference]: Finished difference Result 141394 states and 612178 transitions. [2021-07-13 19:14:06,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:14:06,496 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-07-13 19:14:06,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:07,657 INFO L225 Difference]: With dead ends: 141394 [2021-07-13 19:14:07,657 INFO L226 Difference]: Without dead ends: 141322 [2021-07-13 19:14:07,657 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 254.5ms TimeCoverageRelationStatistics Valid=191, Invalid=459, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:14:07,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141322 states. [2021-07-13 19:14:11,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141322 to 126703. [2021-07-13 19:14:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126703 states, 126702 states have (on average 4.370017837129643) internal successors, (553690), 126702 states have internal predecessors, (553690), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126703 states to 126703 states and 553690 transitions. [2021-07-13 19:14:13,572 INFO L78 Accepts]: Start accepts. Automaton has 126703 states and 553690 transitions. Word has length 30 [2021-07-13 19:14:13,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:13,572 INFO L482 AbstractCegarLoop]: Abstraction has 126703 states and 553690 transitions. [2021-07-13 19:14:13,572 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:13,572 INFO L276 IsEmpty]: Start isEmpty. Operand 126703 states and 553690 transitions. [2021-07-13 19:14:13,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:14:13,827 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:13,827 INFO L508 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] [2021-07-13 19:14:14,040 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:14,041 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:14,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:14,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1447640776, now seen corresponding path program 27 times [2021-07-13 19:14:14,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:14,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142671769] [2021-07-13 19:14:14,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:14,080 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:14,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142671769] [2021-07-13 19:14:14,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142671769] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308614736] [2021-07-13 19:14:14,080 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 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 [2021-07-13 19:14:14,179 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:14:14,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:14,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 10 conjunts are in the unsatisfiable core [2021-07-13 19:14:14,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:14,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308614736] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:14,286 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:14,286 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:14,286 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301247066] [2021-07-13 19:14:14,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:14,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:14,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:14,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:14,286 INFO L87 Difference]: Start difference. First operand 126703 states and 553690 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) [2021-07-13 19:14:16,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:16,360 INFO L93 Difference]: Finished difference Result 141176 states and 611517 transitions. [2021-07-13 19:14:16,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:14:16,361 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 [2021-07-13 19:14:16,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:17,170 INFO L225 Difference]: With dead ends: 141176 [2021-07-13 19:14:17,170 INFO L226 Difference]: Without dead ends: 141132 [2021-07-13 19:14:17,171 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 240.1ms TimeCoverageRelationStatistics Valid=190, Invalid=460, Unknown=0, NotChecked=0, Total=650 [2021-07-13 19:14:17,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141132 states. [2021-07-13 19:14:21,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141132 to 126705. [2021-07-13 19:14:21,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126705 states, 126704 states have (on average 4.370067243338806) internal successors, (553705), 126704 states have internal predecessors, (553705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126705 states to 126705 states and 553705 transitions. [2021-07-13 19:14:22,462 INFO L78 Accepts]: Start accepts. Automaton has 126705 states and 553705 transitions. Word has length 30 [2021-07-13 19:14:22,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:22,462 INFO L482 AbstractCegarLoop]: Abstraction has 126705 states and 553705 transitions. [2021-07-13 19:14:22,462 INFO L483 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) [2021-07-13 19:14:22,462 INFO L276 IsEmpty]: Start isEmpty. Operand 126705 states and 553705 transitions. [2021-07-13 19:14:23,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:14:23,097 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:23,097 INFO L508 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] [2021-07-13 19:14:23,313 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-07-13 19:14:23,313 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:23,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:23,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1706436100, now seen corresponding path program 28 times [2021-07-13 19:14:23,314 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:23,314 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674619456] [2021-07-13 19:14:23,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:23,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:23,364 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 8 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:23,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:23,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674619456] [2021-07-13 19:14:23,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674619456] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:23,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417214491] [2021-07-13 19:14:23,364 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 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 [2021-07-13 19:14:23,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:14:23,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:23,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:14:23,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:23,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:14:23,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:14:23,503 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:14:23,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:14:23,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:14 [2021-07-13 19:14:23,523 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:23,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [417214491] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:23,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:23,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:14:23,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478070335] [2021-07-13 19:14:23,523 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:14:23,523 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:23,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:14:23,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:14:23,524 INFO L87 Difference]: Start difference. First operand 126705 states and 553705 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) [2021-07-13 19:14:26,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:26,215 INFO L93 Difference]: Finished difference Result 149894 states and 645986 transitions. [2021-07-13 19:14:26,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-07-13 19:14:26,216 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 [2021-07-13 19:14:26,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:27,674 INFO L225 Difference]: With dead ends: 149894 [2021-07-13 19:14:27,674 INFO L226 Difference]: Without dead ends: 149494 [2021-07-13 19:14:27,675 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 600.2ms TimeCoverageRelationStatistics Valid=240, Invalid=1400, Unknown=0, NotChecked=0, Total=1640 [2021-07-13 19:14:27,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149494 states. [2021-07-13 19:14:31,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149494 to 129512. [2021-07-13 19:14:32,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129512 states, 129511 states have (on average 4.370130722486893) internal successors, (565980), 129511 states have internal predecessors, (565980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:33,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129512 states to 129512 states and 565980 transitions. [2021-07-13 19:14:33,234 INFO L78 Accepts]: Start accepts. Automaton has 129512 states and 565980 transitions. Word has length 30 [2021-07-13 19:14:33,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:33,234 INFO L482 AbstractCegarLoop]: Abstraction has 129512 states and 565980 transitions. [2021-07-13 19:14:33,234 INFO L483 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) [2021-07-13 19:14:33,234 INFO L276 IsEmpty]: Start isEmpty. Operand 129512 states and 565980 transitions. [2021-07-13 19:14:33,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:14:33,565 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:33,565 INFO L508 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] [2021-07-13 19:14:33,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-07-13 19:14:33,781 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:33,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:33,781 INFO L82 PathProgramCache]: Analyzing trace with hash 461248004, now seen corresponding path program 29 times [2021-07-13 19:14:33,781 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:33,781 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787259715] [2021-07-13 19:14:33,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:33,818 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:33,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:33,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787259715] [2021-07-13 19:14:33,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [787259715] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:33,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1263882775] [2021-07-13 19:14:33,819 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 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 [2021-07-13 19:14:33,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:14:33,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:33,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:14:33,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:14:33,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1263882775] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:33,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:33,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:14:33,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970911200] [2021-07-13 19:14:33,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:14:33,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:33,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:14:33,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:14:33,948 INFO L87 Difference]: Start difference. First operand 129512 states and 565980 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) [2021-07-13 19:14:34,523 WARN L205 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 12 [2021-07-13 19:14:38,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:38,080 INFO L93 Difference]: Finished difference Result 214461 states and 912367 transitions. [2021-07-13 19:14:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-07-13 19:14:38,091 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 [2021-07-13 19:14:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:40,380 INFO L225 Difference]: With dead ends: 214461 [2021-07-13 19:14:40,381 INFO L226 Difference]: Without dead ends: 212520 [2021-07-13 19:14:40,381 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 1128.7ms TimeCoverageRelationStatistics Valid=726, Invalid=2030, Unknown=0, NotChecked=0, Total=2756 [2021-07-13 19:14:41,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212520 states. [2021-07-13 19:14:47,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212520 to 132616. [2021-07-13 19:14:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132616 states, 132615 states have (on average 4.362892583795197) internal successors, (578585), 132615 states have internal predecessors, (578585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:14:48,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132616 states to 132616 states and 578585 transitions. [2021-07-13 19:14:48,620 INFO L78 Accepts]: Start accepts. Automaton has 132616 states and 578585 transitions. Word has length 30 [2021-07-13 19:14:48,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:14:48,620 INFO L482 AbstractCegarLoop]: Abstraction has 132616 states and 578585 transitions. [2021-07-13 19:14:48,620 INFO L483 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) [2021-07-13 19:14:48,620 INFO L276 IsEmpty]: Start isEmpty. Operand 132616 states and 578585 transitions. [2021-07-13 19:14:49,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:14:49,329 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:14:49,329 INFO L508 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] [2021-07-13 19:14:49,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:14:49,545 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:14:49,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:14:49,545 INFO L82 PathProgramCache]: Analyzing trace with hash -1201227792, now seen corresponding path program 30 times [2021-07-13 19:14:49,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:14:49,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72949238] [2021-07-13 19:14:49,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:14:49,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:14:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:49,619 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:14:49,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72949238] [2021-07-13 19:14:49,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72949238] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,619 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115040901] [2021-07-13 19:14:49,619 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 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 [2021-07-13 19:14:49,646 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-07-13 19:14:49,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:14:49,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:14:49,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:14:49,729 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:14:49,729 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115040901] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:14:49,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:14:49,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 12 [2021-07-13 19:14:49,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337694180] [2021-07-13 19:14:49,730 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:14:49,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:14:49,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:14:49,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:14:49,730 INFO L87 Difference]: Start difference. First operand 132616 states and 578585 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) [2021-07-13 19:14:54,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:14:54,151 INFO L93 Difference]: Finished difference Result 300250 states and 1286549 transitions. [2021-07-13 19:14:54,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-07-13 19:14:54,152 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 [2021-07-13 19:14:54,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:14:56,361 INFO L225 Difference]: With dead ends: 300250 [2021-07-13 19:14:56,361 INFO L226 Difference]: Without dead ends: 300250 [2021-07-13 19:14:56,361 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 427 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=418, Invalid=1304, Unknown=0, NotChecked=0, Total=1722 [2021-07-13 19:14:57,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300250 states. [2021-07-13 19:15:06,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300250 to 212691. [2021-07-13 19:15:06,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212691 states, 212690 states have (on average 4.4037519394423805) internal successors, (936634), 212690 states have internal predecessors, (936634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:09,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212691 states to 212691 states and 936634 transitions. [2021-07-13 19:15:09,005 INFO L78 Accepts]: Start accepts. Automaton has 212691 states and 936634 transitions. Word has length 30 [2021-07-13 19:15:09,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:09,005 INFO L482 AbstractCegarLoop]: Abstraction has 212691 states and 936634 transitions. [2021-07-13 19:15:09,005 INFO L483 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) [2021-07-13 19:15:09,005 INFO L276 IsEmpty]: Start isEmpty. Operand 212691 states and 936634 transitions. [2021-07-13 19:15:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:15:09,408 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:09,408 INFO L508 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] [2021-07-13 19:15:09,614 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:09,614 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:09,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:09,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1407643986, now seen corresponding path program 31 times [2021-07-13 19:15:09,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:09,615 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545881615] [2021-07-13 19:15:09,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:09,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:09,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:09,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545881615] [2021-07-13 19:15:09,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545881615] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:09,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1801872841] [2021-07-13 19:15:09,693 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:15:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:09,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 16 conjunts are in the unsatisfiable core [2021-07-13 19:15:09,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:09,828 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 15 [2021-07-13 19:15:09,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:15:09,834 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:15:09,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:15:09,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:20 [2021-07-13 19:15:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:09,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1801872841] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:09,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:09,878 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:09,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012843606] [2021-07-13 19:15:09,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:09,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:09,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:09,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:09,879 INFO L87 Difference]: Start difference. First operand 212691 states and 936634 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) [2021-07-13 19:15:11,740 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-07-13 19:15:15,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:15,905 INFO L93 Difference]: Finished difference Result 282236 states and 1220316 transitions. [2021-07-13 19:15:15,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-07-13 19:15:15,906 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 [2021-07-13 19:15:15,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:20,003 INFO L225 Difference]: With dead ends: 282236 [2021-07-13 19:15:20,003 INFO L226 Difference]: Without dead ends: 281826 [2021-07-13 19:15:20,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 724 ImplicationChecksByTransitivity, 1437.9ms TimeCoverageRelationStatistics Valid=560, Invalid=2410, Unknown=0, NotChecked=0, Total=2970 [2021-07-13 19:15:20,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281826 states. [2021-07-13 19:15:29,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281826 to 224350. [2021-07-13 19:15:29,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224350 states, 224349 states have (on average 4.40408916464972) internal successors, (988053), 224349 states have internal predecessors, (988053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:15:31,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224350 states to 224350 states and 988053 transitions. [2021-07-13 19:15:31,481 INFO L78 Accepts]: Start accepts. Automaton has 224350 states and 988053 transitions. Word has length 30 [2021-07-13 19:15:31,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:15:31,481 INFO L482 AbstractCegarLoop]: Abstraction has 224350 states and 988053 transitions. [2021-07-13 19:15:31,481 INFO L483 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) [2021-07-13 19:15:31,482 INFO L276 IsEmpty]: Start isEmpty. Operand 224350 states and 988053 transitions. [2021-07-13 19:15:31,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:15:31,819 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:15:31,819 INFO L508 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] [2021-07-13 19:15:32,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,63 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:32,035 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:15:32,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:15:32,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1630750348, now seen corresponding path program 32 times [2021-07-13 19:15:32,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:15:32,036 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760186273] [2021-07-13 19:15:32,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:15:32,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:15:32,088 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:15:32,088 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:15:32,088 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760186273] [2021-07-13 19:15:32,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760186273] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:32,089 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258992977] [2021-07-13 19:15:32,089 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 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:15:32,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:15:32,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:15:32,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:15:32,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:15:32,223 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-07-13 19:15:32,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258992977] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:15:32,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:15:32,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 14 [2021-07-13 19:15:32,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325242001] [2021-07-13 19:15:32,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-07-13 19:15:32,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:15:32,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-07-13 19:15:32,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=176, Unknown=0, NotChecked=0, Total=210 [2021-07-13 19:15:32,224 INFO L87 Difference]: Start difference. First operand 224350 states and 988053 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) [2021-07-13 19:15:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:15:40,832 INFO L93 Difference]: Finished difference Result 486397 states and 2091172 transitions. [2021-07-13 19:15:40,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-07-13 19:15:40,832 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 [2021-07-13 19:15:40,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:15:45,569 INFO L225 Difference]: With dead ends: 486397 [2021-07-13 19:15:45,569 INFO L226 Difference]: Without dead ends: 483934 [2021-07-13 19:15:45,570 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2369 ImplicationChecksByTransitivity, 1467.9ms TimeCoverageRelationStatistics Valid=1330, Invalid=5810, Unknown=0, NotChecked=0, Total=7140 [2021-07-13 19:15:46,832 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483934 states. [2021-07-13 19:16:05,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483934 to 267199. [2021-07-13 19:16:05,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267199 states, 267198 states have (on average 4.399258227980749) internal successors, (1175473), 267198 states have internal predecessors, (1175473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:08,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267199 states to 267199 states and 1175473 transitions. [2021-07-13 19:16:08,168 INFO L78 Accepts]: Start accepts. Automaton has 267199 states and 1175473 transitions. Word has length 30 [2021-07-13 19:16:08,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:08,168 INFO L482 AbstractCegarLoop]: Abstraction has 267199 states and 1175473 transitions. [2021-07-13 19:16:08,168 INFO L483 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) [2021-07-13 19:16:08,169 INFO L276 IsEmpty]: Start isEmpty. Operand 267199 states and 1175473 transitions. [2021-07-13 19:16:08,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-07-13 19:16:08,867 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:08,867 INFO L508 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] [2021-07-13 19:16:09,083 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:09,083 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:09,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:09,083 INFO L82 PathProgramCache]: Analyzing trace with hash -154432502, now seen corresponding path program 33 times [2021-07-13 19:16:09,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:09,084 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1541066254] [2021-07-13 19:16:09,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:09,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:09,152 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:09,153 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1541066254] [2021-07-13 19:16:09,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1541066254] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,153 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466251854] [2021-07-13 19:16:09,153 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:09,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-07-13 19:16:09,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:09,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 9 conjunts are in the unsatisfiable core [2021-07-13 19:16:09,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:09,258 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:09,258 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466251854] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:09,258 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:09,258 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-07-13 19:16:09,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734894911] [2021-07-13 19:16:09,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:16:09,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:09,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:16:09,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:16:09,259 INFO L87 Difference]: Start difference. First operand 267199 states and 1175473 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) [2021-07-13 19:16:15,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:15,501 INFO L93 Difference]: Finished difference Result 404661 states and 1760197 transitions. [2021-07-13 19:16:15,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-07-13 19:16:15,501 INFO L78 Accepts]: Start accepts. Automaton has 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) Word has length 30 [2021-07-13 19:16:15,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:20,783 INFO L225 Difference]: With dead ends: 404661 [2021-07-13 19:16:20,783 INFO L226 Difference]: Without dead ends: 403634 [2021-07-13 19:16:20,784 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 293 ImplicationChecksByTransitivity, 353.1ms TimeCoverageRelationStatistics Valid=302, Invalid=958, Unknown=0, NotChecked=0, Total=1260 [2021-07-13 19:16:22,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403634 states. [2021-07-13 19:16:32,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403634 to 196954. [2021-07-13 19:16:33,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196954 states, 196953 states have (on average 4.401897914730926) internal successors, (866967), 196953 states have internal predecessors, (866967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:35,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196954 states to 196954 states and 866967 transitions. [2021-07-13 19:16:35,202 INFO L78 Accepts]: Start accepts. Automaton has 196954 states and 866967 transitions. Word has length 30 [2021-07-13 19:16:35,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:35,202 INFO L482 AbstractCegarLoop]: Abstraction has 196954 states and 866967 transitions. [2021-07-13 19:16:35,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has 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) [2021-07-13 19:16:35,202 INFO L276 IsEmpty]: Start isEmpty. Operand 196954 states and 866967 transitions. [2021-07-13 19:16:35,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:16:35,590 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:35,590 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:35,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:35,792 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:35,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:35,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1759456308, now seen corresponding path program 34 times [2021-07-13 19:16:35,792 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:35,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520409175] [2021-07-13 19:16:35,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:35,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:35,860 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:35,861 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:35,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520409175] [2021-07-13 19:16:35,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520409175] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:35,861 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168120056] [2021-07-13 19:16:35,861 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:35,887 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-07-13 19:16:35,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:16:35,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:16:35,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:36,312 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:16:36,313 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [168120056] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:36,313 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:36,313 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-07-13 19:16:36,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917295558] [2021-07-13 19:16:36,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-07-13 19:16:36,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:36,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-07-13 19:16:36,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=126, Unknown=0, NotChecked=0, Total=156 [2021-07-13 19:16:36,314 INFO L87 Difference]: Start difference. First operand 196954 states and 866967 transitions. Second operand has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:40,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:16:40,120 INFO L93 Difference]: Finished difference Result 299970 states and 1308288 transitions. [2021-07-13 19:16:40,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:16:40,121 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:16:40,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:16:42,607 INFO L225 Difference]: With dead ends: 299970 [2021-07-13 19:16:42,607 INFO L226 Difference]: Without dead ends: 297610 [2021-07-13 19:16:42,607 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 466.8ms TimeCoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:43,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297610 states. [2021-07-13 19:16:53,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297610 to 245260. [2021-07-13 19:16:54,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245260 states, 245259 states have (on average 4.444477063023172) internal successors, (1090048), 245259 states have internal predecessors, (1090048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245260 states to 245260 states and 1090048 transitions. [2021-07-13 19:16:56,713 INFO L78 Accepts]: Start accepts. Automaton has 245260 states and 1090048 transitions. Word has length 33 [2021-07-13 19:16:56,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:16:56,713 INFO L482 AbstractCegarLoop]: Abstraction has 245260 states and 1090048 transitions. [2021-07-13 19:16:56,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 4.153846153846154) internal successors, (54), 12 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:16:56,714 INFO L276 IsEmpty]: Start isEmpty. Operand 245260 states and 1090048 transitions. [2021-07-13 19:16:57,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:16:57,155 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:16:57,155 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:16:57,360 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-07-13 19:16:57,361 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:16:57,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:16:57,361 INFO L82 PathProgramCache]: Analyzing trace with hash -843323476, now seen corresponding path program 1 times [2021-07-13 19:16:57,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:16:57,361 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617116074] [2021-07-13 19:16:57,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:16:57,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:57,433 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:16:57,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617116074] [2021-07-13 19:16:57,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617116074] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124489276] [2021-07-13 19:16:57,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:16:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:16:57,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:16:57,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:16:57,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:16:57,546 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:16:57,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:16:57,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:16:57,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-13 19:16:57,596 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:16:57,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124489276] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:16:57,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:16:57,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-07-13 19:16:57,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691413800] [2021-07-13 19:16:57,597 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:16:57,597 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:16:57,597 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:16:57,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:16:57,597 INFO L87 Difference]: Start difference. First operand 245260 states and 1090048 transitions. Second operand has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:01,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:01,312 INFO L93 Difference]: Finished difference Result 248659 states and 1102596 transitions. [2021-07-13 19:17:01,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:01,312 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:17:01,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:03,255 INFO L225 Difference]: With dead ends: 248659 [2021-07-13 19:17:03,255 INFO L226 Difference]: Without dead ends: 248539 [2021-07-13 19:17:03,255 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 227.7ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248539 states. [2021-07-13 19:17:11,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248539 to 247204. [2021-07-13 19:17:11,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247204 states, 247203 states have (on average 4.439096612905183) internal successors, (1097358), 247203 states have internal predecessors, (1097358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247204 states to 247204 states and 1097358 transitions. [2021-07-13 19:17:14,637 INFO L78 Accepts]: Start accepts. Automaton has 247204 states and 1097358 transitions. Word has length 33 [2021-07-13 19:17:14,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:14,637 INFO L482 AbstractCegarLoop]: Abstraction has 247204 states and 1097358 transitions. [2021-07-13 19:17:14,637 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.75) internal successors, (60), 15 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:14,637 INFO L276 IsEmpty]: Start isEmpty. Operand 247204 states and 1097358 transitions. [2021-07-13 19:17:15,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:17:15,450 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:15,450 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:15,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-07-13 19:17:15,665 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:15,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:15,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1857877874, now seen corresponding path program 1 times [2021-07-13 19:17:15,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:15,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011853831] [2021-07-13 19:17:15,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:15,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:15,806 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:15,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:15,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011853831] [2021-07-13 19:17:15,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011853831] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561260517] [2021-07-13 19:17:15,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:15,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:15,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:15,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:15,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561260517] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:15,995 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:15,996 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 19:17:15,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280376330] [2021-07-13 19:17:15,996 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:17:15,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:15,996 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:17:15,996 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:15,996 INFO L87 Difference]: Start difference. First operand 247204 states and 1097358 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:20,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:20,291 INFO L93 Difference]: Finished difference Result 249510 states and 1105535 transitions. [2021-07-13 19:17:20,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-07-13 19:17:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:17:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:22,991 INFO L225 Difference]: With dead ends: 249510 [2021-07-13 19:17:22,991 INFO L226 Difference]: Without dead ends: 248501 [2021-07-13 19:17:23,004 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 309.6ms TimeCoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-07-13 19:17:23,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248501 states. [2021-07-13 19:17:31,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248501 to 247941. [2021-07-13 19:17:31,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247941 states, 247940 states have (on average 4.436609663628297) internal successors, (1100013), 247940 states have internal predecessors, (1100013), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247941 states to 247941 states and 1100013 transitions. [2021-07-13 19:17:35,285 INFO L78 Accepts]: Start accepts. Automaton has 247941 states and 1100013 transitions. Word has length 33 [2021-07-13 19:17:35,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:35,285 INFO L482 AbstractCegarLoop]: Abstraction has 247941 states and 1100013 transitions. [2021-07-13 19:17:35,285 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:35,285 INFO L276 IsEmpty]: Start isEmpty. Operand 247941 states and 1100013 transitions. [2021-07-13 19:17:36,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:17:36,617 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:36,617 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:36,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:36,818 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:36,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:36,818 INFO L82 PathProgramCache]: Analyzing trace with hash 1129985132, now seen corresponding path program 2 times [2021-07-13 19:17:36,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:36,819 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752451936] [2021-07-13 19:17:36,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:36,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:36,930 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:36,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:36,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752451936] [2021-07-13 19:17:36,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752451936] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:36,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578372906] [2021-07-13 19:17:36,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-07-13 19:17:37,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:37,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:37,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:17:37,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:37,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select 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 [2021-07-13 19:17:37,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-07-13 19:17:37,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-07-13 19:17:37,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-07-13 19:17:37,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:18, output treesize:11 [2021-07-13 19:17:37,136 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 4 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:37,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578372906] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:37,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:37,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-07-13 19:17:37,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808573368] [2021-07-13 19:17:37,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-07-13 19:17:37,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:37,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-07-13 19:17:37,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-07-13 19:17:37,137 INFO L87 Difference]: Start difference. First operand 247941 states and 1100013 transitions. Second operand has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2021-07-13 19:17:41,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:17:41,258 INFO L93 Difference]: Finished difference Result 258027 states and 1137213 transitions. [2021-07-13 19:17:41,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-07-13 19:17:41,258 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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 33 [2021-07-13 19:17:41,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:17:43,393 INFO L225 Difference]: With dead ends: 258027 [2021-07-13 19:17:43,393 INFO L226 Difference]: Without dead ends: 257921 [2021-07-13 19:17:43,394 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 336.6ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-07-13 19:17:43,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257921 states. [2021-07-13 19:17:52,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257921 to 249856. [2021-07-13 19:17:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249856 states, 249855 states have (on average 4.432294730943948) internal successors, (1107431), 249855 states have internal predecessors, (1107431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:17:56,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249856 states to 249856 states and 1107431 transitions. [2021-07-13 19:17:56,956 INFO L78 Accepts]: Start accepts. Automaton has 249856 states and 1107431 transitions. Word has length 33 [2021-07-13 19:17:56,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:17:56,956 INFO L482 AbstractCegarLoop]: Abstraction has 249856 states and 1107431 transitions. [2021-07-13 19:17:56,956 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 3.5625) internal successors, (57), 15 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) [2021-07-13 19:17:56,957 INFO L276 IsEmpty]: Start isEmpty. Operand 249856 states and 1107431 transitions. [2021-07-13 19:17:57,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:17:57,544 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:17:57,544 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:17:57,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-07-13 19:17:57,744 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:17:57,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:17:57,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1036448618, now seen corresponding path program 2 times [2021-07-13 19:17:57,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:17:57,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251660201] [2021-07-13 19:17:57,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:17:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:17:57,897 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:57,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:17:57,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251660201] [2021-07-13 19:17:57,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251660201] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:57,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1837803522] [2021-07-13 19:17:57,898 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:17:57,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-07-13 19:17:57,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:17:57,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:17:57,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:17:58,083 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:17:58,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1837803522] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:17:58,083 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:17:58,083 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 19:17:58,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935263219] [2021-07-13 19:17:58,084 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:17:58,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:17:58,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:17:58,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:17:58,091 INFO L87 Difference]: Start difference. First operand 249856 states and 1107431 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:02,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:02,723 INFO L93 Difference]: Finished difference Result 251203 states and 1111360 transitions. [2021-07-13 19:18:02,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:02,723 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:18:02,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:05,132 INFO L225 Difference]: With dead ends: 251203 [2021-07-13 19:18:05,133 INFO L226 Difference]: Without dead ends: 250188 [2021-07-13 19:18:05,133 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 635.9ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:18:05,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250188 states. [2021-07-13 19:18:13,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250188 to 249232. [2021-07-13 19:18:14,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249232 states, 249231 states have (on average 4.431382933904691) internal successors, (1104438), 249231 states have internal predecessors, (1104438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:17,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249232 states to 249232 states and 1104438 transitions. [2021-07-13 19:18:17,096 INFO L78 Accepts]: Start accepts. Automaton has 249232 states and 1104438 transitions. Word has length 33 [2021-07-13 19:18:17,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:17,096 INFO L482 AbstractCegarLoop]: Abstraction has 249232 states and 1104438 transitions. [2021-07-13 19:18:17,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:17,096 INFO L276 IsEmpty]: Start isEmpty. Operand 249232 states and 1104438 transitions. [2021-07-13 19:18:18,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:18:18,054 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:18,054 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:18,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:18,270 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:18,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:18,271 INFO L82 PathProgramCache]: Analyzing trace with hash -1947467614, now seen corresponding path program 3 times [2021-07-13 19:18:18,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:18,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800549272] [2021-07-13 19:18:18,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:18,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:18,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:18,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800549272] [2021-07-13 19:18:18,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800549272] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:18,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808995044] [2021-07-13 19:18:18,380 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:18,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-07-13 19:18:18,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:18,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 18 conjunts are in the unsatisfiable core [2021-07-13 19:18:18,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:18,583 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:18:18,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808995044] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:18,583 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:18,583 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2021-07-13 19:18:18,583 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300238476] [2021-07-13 19:18:18,584 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-07-13 19:18:18,584 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:18,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-07-13 19:18:18,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-07-13 19:18:18,584 INFO L87 Difference]: Start difference. First operand 249232 states and 1104438 transitions. Second operand has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:23,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:23,557 INFO L93 Difference]: Finished difference Result 253243 states and 1118843 transitions. [2021-07-13 19:18:23,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-07-13 19:18:23,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:18:23,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:25,655 INFO L225 Difference]: With dead ends: 253243 [2021-07-13 19:18:25,656 INFO L226 Difference]: Without dead ends: 251565 [2021-07-13 19:18:25,656 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 504.8ms TimeCoverageRelationStatistics Valid=188, Invalid=1002, Unknown=0, NotChecked=0, Total=1190 [2021-07-13 19:18:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251565 states. [2021-07-13 19:18:34,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251565 to 250713. [2021-07-13 19:18:35,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250713 states, 250712 states have (on average 4.423908707999617) internal successors, (1109127), 250712 states have internal predecessors, (1109127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:39,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250713 states to 250713 states and 1109127 transitions. [2021-07-13 19:18:39,016 INFO L78 Accepts]: Start accepts. Automaton has 250713 states and 1109127 transitions. Word has length 33 [2021-07-13 19:18:39,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:18:39,016 INFO L482 AbstractCegarLoop]: Abstraction has 250713 states and 1109127 transitions. [2021-07-13 19:18:39,016 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 3.611111111111111) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:18:39,017 INFO L276 IsEmpty]: Start isEmpty. Operand 250713 states and 1109127 transitions. [2021-07-13 19:18:40,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:18:40,169 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:18:40,172 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:18:40,373 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-07-13 19:18:40,373 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:18:40,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:18:40,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1681201706, now seen corresponding path program 35 times [2021-07-13 19:18:40,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:18:40,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410976765] [2021-07-13 19:18:40,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:18:40,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:18:40,477 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:40,477 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:18:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410976765] [2021-07-13 19:18:40,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410976765] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:40,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701835494] [2021-07-13 19:18:40,477 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:18:40,550 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-07-13 19:18:40,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:18:40,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:18:40,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:18:40,648 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:18:40,649 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1701835494] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:18:40,649 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:18:40,649 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:18:40,649 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113950098] [2021-07-13 19:18:40,649 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:18:40,649 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:18:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:18:40,650 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:18:40,650 INFO L87 Difference]: Start difference. First operand 250713 states and 1109127 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) [2021-07-13 19:18:46,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:18:46,308 INFO L93 Difference]: Finished difference Result 408902 states and 1783714 transitions. [2021-07-13 19:18:46,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-07-13 19:18:46,308 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 33 [2021-07-13 19:18:46,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:18:51,288 INFO L225 Difference]: With dead ends: 408902 [2021-07-13 19:18:51,288 INFO L226 Difference]: Without dead ends: 403086 [2021-07-13 19:18:51,288 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-07-13 19:18:52,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403086 states. [2021-07-13 19:19:08,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403086 to 323030. [2021-07-13 19:19:09,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323030 states, 323029 states have (on average 4.426342526522387) internal successors, (1429837), 323029 states have internal predecessors, (1429837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:12,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323030 states to 323030 states and 1429837 transitions. [2021-07-13 19:19:12,304 INFO L78 Accepts]: Start accepts. Automaton has 323030 states and 1429837 transitions. Word has length 33 [2021-07-13 19:19:12,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:19:12,304 INFO L482 AbstractCegarLoop]: Abstraction has 323030 states and 1429837 transitions. [2021-07-13 19:19:12,304 INFO L483 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) [2021-07-13 19:19:12,305 INFO L276 IsEmpty]: Start isEmpty. Operand 323030 states and 1429837 transitions. [2021-07-13 19:19:13,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:19:13,223 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:19:13,223 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:19:13,437 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:13,437 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:19:13,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:19:13,437 INFO L82 PathProgramCache]: Analyzing trace with hash -913135154, now seen corresponding path program 36 times [2021-07-13 19:19:13,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:19:13,437 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303315347] [2021-07-13 19:19:13,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:19:13,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:19:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:19:13,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:19:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303315347] [2021-07-13 19:19:13,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303315347] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:13,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209084193] [2021-07-13 19:19:13,531 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:19:13,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-07-13 19:19:13,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-07-13 19:19:13,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 17 conjunts are in the unsatisfiable core [2021-07-13 19:19:13,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:19:13,778 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-07-13 19:19:13,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209084193] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:19:13,778 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:19:13,778 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 18 [2021-07-13 19:19:13,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147888292] [2021-07-13 19:19:13,778 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-07-13 19:19:13,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:19:13,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-07-13 19:19:13,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-07-13 19:19:13,779 INFO L87 Difference]: Start difference. First operand 323030 states and 1429837 transitions. Second operand has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:19:14,552 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 14 DAG size of output: 11 [2021-07-13 19:19:29,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-07-13 19:19:29,769 INFO L93 Difference]: Finished difference Result 564498 states and 2414011 transitions. [2021-07-13 19:19:29,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2021-07-13 19:19:29,769 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-07-13 19:19:29,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-07-13 19:19:34,788 INFO L225 Difference]: With dead ends: 564498 [2021-07-13 19:19:34,789 INFO L226 Difference]: Without dead ends: 555301 [2021-07-13 19:19:34,790 INFO L764 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10906 ImplicationChecksByTransitivity, 4879.3ms TimeCoverageRelationStatistics Valid=3771, Invalid=24959, Unknown=0, NotChecked=0, Total=28730 [2021-07-13 19:19:36,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 555301 states. [2021-07-13 19:20:02,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 555301 to 426258. [2021-07-13 19:20:03,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426258 states, 426257 states have (on average 4.406536432246274) internal successors, (1878317), 426257 states have internal predecessors, (1878317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:09,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426258 states to 426258 states and 1878317 transitions. [2021-07-13 19:20:09,182 INFO L78 Accepts]: Start accepts. Automaton has 426258 states and 1878317 transitions. Word has length 33 [2021-07-13 19:20:09,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-07-13 19:20:09,182 INFO L482 AbstractCegarLoop]: Abstraction has 426258 states and 1878317 transitions. [2021-07-13 19:20:09,182 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 3.263157894736842) internal successors, (62), 18 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-07-13 19:20:09,182 INFO L276 IsEmpty]: Start isEmpty. Operand 426258 states and 1878317 transitions. [2021-07-13 19:20:10,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-07-13 19:20:10,588 INFO L500 BasicCegarLoop]: Found error trace [2021-07-13 19:20:10,589 INFO L508 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-07-13 19:20:10,806 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:10,806 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-07-13 19:20:10,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-07-13 19:20:10,806 INFO L82 PathProgramCache]: Analyzing trace with hash -261102064, now seen corresponding path program 37 times [2021-07-13 19:20:10,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-07-13 19:20:10,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518706746] [2021-07-13 19:20:10,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-07-13 19:20:10,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:11,242 WARN L205 SmtUtils]: Spent 378.00 ms on a formula simplification that was a NOOP. DAG size: 13 [2021-07-13 19:20:11,308 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:20:11,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-07-13 19:20:11,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518706746] [2021-07-13 19:20:11,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [518706746] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:11,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670076545] [2021-07-13 19:20:11,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-07-13 19:20:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-07-13 19:20:11,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 14 conjunts are in the unsatisfiable core [2021-07-13 19:20:11,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-07-13 19:20:11,485 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2021-07-13 19:20:11,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670076545] provided 0 perfect and 1 imperfect interpolant sequences [2021-07-13 19:20:11,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-07-13 19:20:11,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-07-13 19:20:11,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832634898] [2021-07-13 19:20:11,485 INFO L462 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-07-13 19:20:11,485 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-07-13 19:20:11,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-07-13 19:20:11,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-07-13 19:20:11,486 INFO L87 Difference]: Start difference. First operand 426258 states and 1878317 transitions. Second operand has 14 states, 14 states have (on average 3.857142857142857) internal successors, (54), 13 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)