/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-7cd14b8b9f04096d8ddfd3d9cd8a4ac590fe5404-7cd14b8 [2021-03-10 23:27:08,526 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-03-10 23:27:08,529 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-03-10 23:27:08,568 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-03-10 23:27:08,589 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-03-10 23:27:08,591 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-03-10 23:27:08,592 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-03-10 23:27:08,593 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-03-10 23:27:08,595 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-03-10 23:27:08,596 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-03-10 23:27:08,598 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-03-10 23:27:08,603 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-03-10 23:27:08,604 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-03-10 23:27:08,606 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-03-10 23:27:08,607 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-03-10 23:27:08,609 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-03-10 23:27:08,613 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-03-10 23:27:08,619 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-03-10 23:27:08,620 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-03-10 23:27:08,621 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-03-10 23:27:08,623 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-03-10 23:27:08,655 INFO L113 SettingsManager]: Loading preferences was successful [2021-03-10 23:27:08,655 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-03-10 23:27:08,656 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-03-10 23:27:08,656 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-03-10 23:27:08,658 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-03-10 23:27:08,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-03-10 23:27:08,659 INFO L138 SettingsManager]: * Use SBE=true [2021-03-10 23:27:08,659 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-03-10 23:27:08,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-03-10 23:27:08,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-03-10 23:27:08,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-03-10 23:27:08,660 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-03-10 23:27:08,660 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-03-10 23:27:08,660 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-03-10 23:27:08,660 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-03-10 23:27:08,660 INFO L138 SettingsManager]: * sizeof long double=12 [2021-03-10 23:27:08,661 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-03-10 23:27:08,661 INFO L138 SettingsManager]: * Use constant arrays=true [2021-03-10 23:27:08,661 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-03-10 23:27:08,661 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-03-10 23:27:08,661 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-03-10 23:27:08,661 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-03-10 23:27:08,661 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-03-10 23:27:08,661 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:27:08,662 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-03-10 23:27:08,662 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-03-10 23:27:08,662 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-03-10 23:27:08,662 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-03-10 23:27:08,662 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-03-10 23:27:08,662 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-03-10 23:27:08,662 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-03-10 23:27:08,663 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-03-10 23:27:08,973 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-03-10 23:27:08,992 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-03-10 23:27:08,994 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-03-10 23:27:08,995 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-03-10 23:27:08,996 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-03-10 23:27:08,997 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl [2021-03-10 23:27:08,997 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-bad/counter-queue.wvr.bpl' [2021-03-10 23:27:09,036 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-03-10 23:27:09,043 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-03-10 23:27:09,044 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-03-10 23:27:09,045 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-03-10 23:27:09,045 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-03-10 23:27:09,052 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,057 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,063 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-03-10 23:27:09,064 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-03-10 23:27:09,064 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-03-10 23:27:09,065 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-03-10 23:27:09,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,072 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,072 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,074 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,077 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,077 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... [2021-03-10 23:27:09,078 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-03-10 23:27:09,079 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-03-10 23:27:09,079 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-03-10 23:27:09,079 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-03-10 23:27:09,081 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-03-10 23:27:09,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-03-10 23:27:09,145 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-03-10 23:27:09,145 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-03-10 23:27:09,145 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-03-10 23:27:09,146 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-03-10 23:27:09,146 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-03-10 23:27:09,146 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-03-10 23:27:09,146 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-03-10 23:27:09,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-03-10 23:27:09,147 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-03-10 23:27:09,369 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-03-10 23:27:09,370 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-03-10 23:27:09,371 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:27:09 BoogieIcfgContainer [2021-03-10 23:27:09,371 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-03-10 23:27:09,373 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-03-10 23:27:09,373 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-03-10 23:27:09,375 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-03-10 23:27:09,375 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 10.03 11:27:09" (1/2) ... [2021-03-10 23:27:09,376 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@134e1947 and model type counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 10.03 11:27:09, skipping insertion in model container [2021-03-10 23:27:09,376 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 10.03 11:27:09" (2/2) ... [2021-03-10 23:27:09,377 INFO L111 eAbstractionObserver]: Analyzing ICFG counter-queue.wvr.bpl [2021-03-10 23:27:09,396 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-03-10 23:27:09,396 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-03-10 23:27:09,399 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-03-10 23:27:09,400 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-03-10 23:27:09,464 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-03-10 23:27:09,493 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-03-10 23:27:09,517 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-03-10 23:27:09,517 INFO L377 AbstractCegarLoop]: Hoare is true [2021-03-10 23:27:09,517 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-03-10 23:27:09,517 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-03-10 23:27:09,517 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-03-10 23:27:09,517 INFO L381 AbstractCegarLoop]: Difference is false [2021-03-10 23:27:09,518 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-03-10 23:27:09,518 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-03-10 23:27:09,525 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 27 places, 22 transitions, 60 flow [2021-03-10 23:27:09,539 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-03-10 23:27:09,541 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) [2021-03-10 23:27:09,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-03-10 23:27:09,547 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:09,547 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:09,548 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:09,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:09,556 INFO L82 PathProgramCache]: Analyzing trace with hash 1635099045, now seen corresponding path program 1 times [2021-03-10 23:27:09,563 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:09,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075422650] [2021-03-10 23:27:09,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:09,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:09,707 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075422650] [2021-03-10 23:27:09,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:27:09,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-03-10 23:27:09,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382242062] [2021-03-10 23:27:09,712 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-03-10 23:27:09,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:09,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-03-10 23:27:09,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:27:09,730 INFO L87 Difference]: Start difference. First operand has 34 states, 32 states have (on average 1.8125) internal successors, (58), 33 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) Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:09,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:09,762 INFO L93 Difference]: Finished difference Result 57 states and 105 transitions. [2021-03-10 23:27:09,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-03-10 23:27:09,764 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-03-10 23:27:09,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:09,772 INFO L225 Difference]: With dead ends: 57 [2021-03-10 23:27:09,773 INFO L226 Difference]: Without dead ends: 50 [2021-03-10 23:27:09,774 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.3ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-03-10 23:27:09,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-03-10 23:27:09,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 41. [2021-03-10 23:27:09,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.85) internal successors, (74), 40 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:09,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 74 transitions. [2021-03-10 23:27:09,813 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 74 transitions. Word has length 14 [2021-03-10 23:27:09,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:09,815 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 74 transitions. [2021-03-10 23:27:09,815 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:09,815 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 74 transitions. [2021-03-10 23:27:09,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:27:09,816 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:09,816 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:09,816 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-03-10 23:27:09,817 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:09,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:09,820 INFO L82 PathProgramCache]: Analyzing trace with hash 2119693475, now seen corresponding path program 1 times [2021-03-10 23:27:09,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:09,821 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269866151] [2021-03-10 23:27:09,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:09,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:09,965 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:09,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269866151] [2021-03-10 23:27:09,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6219667] [2021-03-10 23:27:09,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:10,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 33 conjuncts, 5 conjunts are in the unsatisfiable core [2021-03-10 23:27:10,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:10,193 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:10,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:10,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 9 [2021-03-10 23:27:10,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294135033] [2021-03-10 23:27:10,195 INFO L460 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-03-10 23:27:10,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:10,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-03-10 23:27:10,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:27:10,196 INFO L87 Difference]: Start difference. First operand 41 states and 74 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:10,328 INFO L93 Difference]: Finished difference Result 68 states and 120 transitions. [2021-03-10 23:27:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-03-10 23:27:10,329 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:27:10,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:10,330 INFO L225 Difference]: With dead ends: 68 [2021-03-10 23:27:10,330 INFO L226 Difference]: Without dead ends: 68 [2021-03-10 23:27:10,331 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 160.1ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:27:10,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-03-10 23:27:10,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 41. [2021-03-10 23:27:10,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.9) internal successors, (76), 40 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 76 transitions. [2021-03-10 23:27:10,337 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 76 transitions. Word has length 16 [2021-03-10 23:27:10,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:10,337 INFO L480 AbstractCegarLoop]: Abstraction has 41 states and 76 transitions. [2021-03-10 23:27:10,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,337 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 76 transitions. [2021-03-10 23:27:10,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:27:10,338 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:10,338 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:10,551 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-03-10 23:27:10,552 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:10,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:10,552 INFO L82 PathProgramCache]: Analyzing trace with hash 831812391, now seen corresponding path program 1 times [2021-03-10 23:27:10,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:10,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686063912] [2021-03-10 23:27:10,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:10,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:10,608 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:10,609 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686063912] [2021-03-10 23:27:10,609 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:27:10,609 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 23:27:10,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154207495] [2021-03-10 23:27:10,610 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:27:10,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:10,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:27:10,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:27:10,611 INFO L87 Difference]: Start difference. First operand 41 states and 76 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:10,685 INFO L93 Difference]: Finished difference Result 71 states and 125 transitions. [2021-03-10 23:27:10,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:27:10,685 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:27:10,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:10,690 INFO L225 Difference]: With dead ends: 71 [2021-03-10 23:27:10,692 INFO L226 Difference]: Without dead ends: 66 [2021-03-10 23:27:10,692 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 39.0ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:10,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-03-10 23:27:10,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2021-03-10 23:27:10,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.8958333333333333) internal successors, (91), 48 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 91 transitions. [2021-03-10 23:27:10,708 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 91 transitions. Word has length 16 [2021-03-10 23:27:10,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:10,709 INFO L480 AbstractCegarLoop]: Abstraction has 49 states and 91 transitions. [2021-03-10 23:27:10,709 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,709 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 91 transitions. [2021-03-10 23:27:10,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:27:10,709 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:10,710 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:10,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-03-10 23:27:10,710 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:10,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:10,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1002480409, now seen corresponding path program 2 times [2021-03-10 23:27:10,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:10,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775792226] [2021-03-10 23:27:10,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:10,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:10,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:10,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775792226] [2021-03-10 23:27:10,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:27:10,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 23:27:10,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [739904116] [2021-03-10 23:27:10,769 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:27:10,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:10,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:27:10,771 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:27:10,771 INFO L87 Difference]: Start difference. First operand 49 states and 91 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:10,830 INFO L93 Difference]: Finished difference Result 51 states and 94 transitions. [2021-03-10 23:27:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-03-10 23:27:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:27:10,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:10,834 INFO L225 Difference]: With dead ends: 51 [2021-03-10 23:27:10,834 INFO L226 Difference]: Without dead ends: 51 [2021-03-10 23:27:10,834 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.2ms TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:10,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-03-10 23:27:10,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 43. [2021-03-10 23:27:10,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.880952380952381) internal successors, (79), 42 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 79 transitions. [2021-03-10 23:27:10,845 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 79 transitions. Word has length 16 [2021-03-10 23:27:10,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:10,845 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 79 transitions. [2021-03-10 23:27:10,845 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,846 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 79 transitions. [2021-03-10 23:27:10,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-03-10 23:27:10,846 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:10,847 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:10,847 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-03-10 23:27:10,847 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:10,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:10,847 INFO L82 PathProgramCache]: Analyzing trace with hash -1334159197, now seen corresponding path program 2 times [2021-03-10 23:27:10,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:10,848 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [39250543] [2021-03-10 23:27:10,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:10,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:10,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:10,907 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [39250543] [2021-03-10 23:27:10,907 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-03-10 23:27:10,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-03-10 23:27:10,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755313376] [2021-03-10 23:27:10,908 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-03-10 23:27:10,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:10,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-03-10 23:27:10,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2021-03-10 23:27:10,909 INFO L87 Difference]: Start difference. First operand 43 states and 79 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:10,981 INFO L93 Difference]: Finished difference Result 51 states and 92 transitions. [2021-03-10 23:27:10,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:27:10,981 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-03-10 23:27:10,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:10,982 INFO L225 Difference]: With dead ends: 51 [2021-03-10 23:27:10,987 INFO L226 Difference]: Without dead ends: 49 [2021-03-10 23:27:10,988 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 49.3ms TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2021-03-10 23:27:10,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-03-10 23:27:10,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2021-03-10 23:27:10,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.8571428571428572) internal successors, (78), 42 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 78 transitions. [2021-03-10 23:27:10,996 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 78 transitions. Word has length 16 [2021-03-10 23:27:10,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:10,996 INFO L480 AbstractCegarLoop]: Abstraction has 43 states and 78 transitions. [2021-03-10 23:27:10,997 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:10,997 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 78 transitions. [2021-03-10 23:27:10,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:27:10,998 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:10,998 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:10,998 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-03-10 23:27:10,998 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:10,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:10,999 INFO L82 PathProgramCache]: Analyzing trace with hash -1624375643, now seen corresponding path program 1 times [2021-03-10 23:27:10,999 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:10,999 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248564035] [2021-03-10 23:27:10,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:11,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:11,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248564035] [2021-03-10 23:27:11,164 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559018590] [2021-03-10 23:27:11,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:11,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:11,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:27:11,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:11,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:11,373 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-03-10 23:27:11,374 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:11,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:11,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:11,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-03-10 23:27:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:11,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:11,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:27:11,429 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875922846] [2021-03-10 23:27:11,429 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:27:11,429 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:27:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:11,430 INFO L87 Difference]: Start difference. First operand 43 states and 78 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:11,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:11,509 INFO L93 Difference]: Finished difference Result 86 states and 163 transitions. [2021-03-10 23:27:11,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:27:11,510 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-03-10 23:27:11,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:11,511 INFO L225 Difference]: With dead ends: 86 [2021-03-10 23:27:11,511 INFO L226 Difference]: Without dead ends: 79 [2021-03-10 23:27:11,511 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 122.3ms TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:11,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-03-10 23:27:11,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 59. [2021-03-10 23:27:11,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.9310344827586208) internal successors, (112), 58 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:11,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 112 transitions. [2021-03-10 23:27:11,514 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 112 transitions. Word has length 18 [2021-03-10 23:27:11,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:11,515 INFO L480 AbstractCegarLoop]: Abstraction has 59 states and 112 transitions. [2021-03-10 23:27:11,515 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:11,515 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 112 transitions. [2021-03-10 23:27:11,515 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-03-10 23:27:11,515 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:11,516 INFO L519 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:11,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:11,737 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:11,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:11,737 INFO L82 PathProgramCache]: Analyzing trace with hash 1933122355, now seen corresponding path program 2 times [2021-03-10 23:27:11,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:11,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799440364] [2021-03-10 23:27:11,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:11,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:11,826 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:11,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799440364] [2021-03-10 23:27:11,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1371471484] [2021-03-10 23:27:11,826 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) [2021-03-10 23:27:11,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:11,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:11,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:27:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:11,961 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:11,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2021-03-10 23:27:11,963 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:11,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:11,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:11,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:25, output treesize:7 [2021-03-10 23:27:12,001 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:12,001 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:12,001 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-03-10 23:27:12,001 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844485717] [2021-03-10 23:27:12,002 INFO L460 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-03-10 23:27:12,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:12,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-03-10 23:27:12,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:12,002 INFO L87 Difference]: Start difference. First operand 59 states and 112 transitions. Second operand has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:12,059 INFO L93 Difference]: Finished difference Result 94 states and 180 transitions. [2021-03-10 23:27:12,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-03-10 23:27:12,060 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 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 18 [2021-03-10 23:27:12,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:12,061 INFO L225 Difference]: With dead ends: 94 [2021-03-10 23:27:12,061 INFO L226 Difference]: Without dead ends: 87 [2021-03-10 23:27:12,061 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 13 SyntacticMatches, 3 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 102.5ms TimeCoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-03-10 23:27:12,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-03-10 23:27:12,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 65. [2021-03-10 23:27:12,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.9375) internal successors, (124), 64 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 124 transitions. [2021-03-10 23:27:12,069 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 124 transitions. Word has length 18 [2021-03-10 23:27:12,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:12,070 INFO L480 AbstractCegarLoop]: Abstraction has 65 states and 124 transitions. [2021-03-10 23:27:12,070 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 2.888888888888889) internal successors, (26), 8 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,070 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 124 transitions. [2021-03-10 23:27:12,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:27:12,071 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:12,071 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:12,287 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:12,287 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:12,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:12,288 INFO L82 PathProgramCache]: Analyzing trace with hash 210936483, now seen corresponding path program 3 times [2021-03-10 23:27:12,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:12,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201602972] [2021-03-10 23:27:12,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:12,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:12,356 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:12,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201602972] [2021-03-10 23:27:12,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197882185] [2021-03-10 23:27:12,357 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 [2021-03-10 23:27:12,379 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:27:12,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:12,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:12,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:12,494 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:12,495 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:12,495 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-03-10 23:27:12,495 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600817523] [2021-03-10 23:27:12,495 INFO L460 AbstractCegarLoop]: Interpolant automaton has 14 states [2021-03-10 23:27:12,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:12,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-03-10 23:27:12,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:27:12,496 INFO L87 Difference]: Start difference. First operand 65 states and 124 transitions. Second operand has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:12,811 INFO L93 Difference]: Finished difference Result 176 states and 326 transitions. [2021-03-10 23:27:12,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:27:12,811 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 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 20 [2021-03-10 23:27:12,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:12,813 INFO L225 Difference]: With dead ends: 176 [2021-03-10 23:27:12,813 INFO L226 Difference]: Without dead ends: 176 [2021-03-10 23:27:12,813 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 266.3ms TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:27:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-03-10 23:27:12,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 73. [2021-03-10 23:27:12,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.0833333333333335) internal successors, (150), 72 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 150 transitions. [2021-03-10 23:27:12,824 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 150 transitions. Word has length 20 [2021-03-10 23:27:12,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:12,824 INFO L480 AbstractCegarLoop]: Abstraction has 73 states and 150 transitions. [2021-03-10 23:27:12,824 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 14 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:12,824 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 150 transitions. [2021-03-10 23:27:12,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:27:12,828 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:12,828 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:13,049 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:13,050 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:13,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:13,050 INFO L82 PathProgramCache]: Analyzing trace with hash -492203993, now seen corresponding path program 4 times [2021-03-10 23:27:13,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:13,050 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498122277] [2021-03-10 23:27:13,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:13,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:13,100 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:13,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498122277] [2021-03-10 23:27:13,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043422487] [2021-03-10 23:27:13,104 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 [2021-03-10 23:27:13,131 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:13,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:13,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:13,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:13,222 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:13,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:13,222 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:27:13,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035275929] [2021-03-10 23:27:13,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:13,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:13,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:13,224 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:13,224 INFO L87 Difference]: Start difference. First operand 73 states and 150 transitions. Second operand has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-03-10 23:27:13,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:13,525 INFO L93 Difference]: Finished difference Result 219 states and 406 transitions. [2021-03-10 23:27:13,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-03-10 23:27:13,528 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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 20 [2021-03-10 23:27:13,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:13,529 INFO L225 Difference]: With dead ends: 219 [2021-03-10 23:27:13,529 INFO L226 Difference]: Without dead ends: 205 [2021-03-10 23:27:13,529 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 253.4ms TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:27:13,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-03-10 23:27:13,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 102. [2021-03-10 23:27:13,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.1386138613861387) internal successors, (216), 101 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:13,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 216 transitions. [2021-03-10 23:27:13,534 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 216 transitions. Word has length 20 [2021-03-10 23:27:13,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:13,534 INFO L480 AbstractCegarLoop]: Abstraction has 102 states and 216 transitions. [2021-03-10 23:27:13,534 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3846153846153846) internal successors, (31), 12 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) [2021-03-10 23:27:13,534 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 216 transitions. [2021-03-10 23:27:13,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:27:13,535 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:13,535 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:13,756 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:13,756 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:13,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:13,757 INFO L82 PathProgramCache]: Analyzing trace with hash 97165543, now seen corresponding path program 5 times [2021-03-10 23:27:13,757 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:13,757 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327342037] [2021-03-10 23:27:13,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:13,819 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:13,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327342037] [2021-03-10 23:27:13,819 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944386715] [2021-03-10 23:27:13,819 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:13,845 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:27:13,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:13,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:13,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:13,935 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:13,935 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:13,936 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 23:27:13,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241197500] [2021-03-10 23:27:13,936 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:13,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:13,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:13,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:13,937 INFO L87 Difference]: Start difference. First operand 102 states and 216 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:14,237 INFO L93 Difference]: Finished difference Result 208 states and 404 transitions. [2021-03-10 23:27:14,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:27:14,238 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:27:14,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:14,239 INFO L225 Difference]: With dead ends: 208 [2021-03-10 23:27:14,239 INFO L226 Difference]: Without dead ends: 208 [2021-03-10 23:27:14,239 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 252.1ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:27:14,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-03-10 23:27:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 118. [2021-03-10 23:27:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 2.2051282051282053) internal successors, (258), 117 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 258 transitions. [2021-03-10 23:27:14,247 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 258 transitions. Word has length 20 [2021-03-10 23:27:14,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:14,248 INFO L480 AbstractCegarLoop]: Abstraction has 118 states and 258 transitions. [2021-03-10 23:27:14,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 258 transitions. [2021-03-10 23:27:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:27:14,248 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:14,249 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:14,462 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:14,462 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:14,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:14,462 INFO L82 PathProgramCache]: Analyzing trace with hash -234513245, now seen corresponding path program 6 times [2021-03-10 23:27:14,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:14,463 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802024328] [2021-03-10 23:27:14,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:14,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802024328] [2021-03-10 23:27:14,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138730824] [2021-03-10 23:27:14,517 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:14,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:14,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:14,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:14,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:14,644 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:14,644 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:14,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 23:27:14,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475149726] [2021-03-10 23:27:14,645 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:14,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:14,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:14,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:14,646 INFO L87 Difference]: Start difference. First operand 118 states and 258 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:14,893 INFO L93 Difference]: Finished difference Result 205 states and 416 transitions. [2021-03-10 23:27:14,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:27:14,894 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:27:14,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:14,895 INFO L225 Difference]: With dead ends: 205 [2021-03-10 23:27:14,895 INFO L226 Difference]: Without dead ends: 203 [2021-03-10 23:27:14,895 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=176, Invalid=424, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:27:14,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2021-03-10 23:27:14,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 120. [2021-03-10 23:27:14,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 2.1848739495798317) internal successors, (260), 119 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 260 transitions. [2021-03-10 23:27:14,904 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 260 transitions. Word has length 20 [2021-03-10 23:27:14,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:14,904 INFO L480 AbstractCegarLoop]: Abstraction has 120 states and 260 transitions. [2021-03-10 23:27:14,904 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:14,904 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 260 transitions. [2021-03-10 23:27:14,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:27:14,905 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:14,905 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:15,126 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:15,127 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:15,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:15,127 INFO L82 PathProgramCache]: Analyzing trace with hash -2122602315, now seen corresponding path program 7 times [2021-03-10 23:27:15,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:15,127 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922471116] [2021-03-10 23:27:15,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:15,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:15,171 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:15,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922471116] [2021-03-10 23:27:15,171 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [369749723] [2021-03-10 23:27:15,171 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:15,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:15,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:15,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:15,282 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:15,282 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:15,282 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:27:15,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420078034] [2021-03-10 23:27:15,283 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:15,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:15,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:15,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:15,284 INFO L87 Difference]: Start difference. First operand 120 states and 260 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:15,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:15,573 INFO L93 Difference]: Finished difference Result 300 states and 609 transitions. [2021-03-10 23:27:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:27:15,574 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 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 20 [2021-03-10 23:27:15,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:15,577 INFO L225 Difference]: With dead ends: 300 [2021-03-10 23:27:15,578 INFO L226 Difference]: Without dead ends: 300 [2021-03-10 23:27:15,578 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 259.1ms TimeCoverageRelationStatistics Valid=218, Invalid=484, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:27:15,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-03-10 23:27:15,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 165. [2021-03-10 23:27:15,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 2.292682926829268) internal successors, (376), 164 states have internal predecessors, (376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 376 transitions. [2021-03-10 23:27:15,589 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 376 transitions. Word has length 20 [2021-03-10 23:27:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:15,589 INFO L480 AbstractCegarLoop]: Abstraction has 165 states and 376 transitions. [2021-03-10 23:27:15,590 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:15,590 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 376 transitions. [2021-03-10 23:27:15,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:27:15,591 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:15,591 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:15,808 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-03-10 23:27:15,808 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:15,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:15,808 INFO L82 PathProgramCache]: Analyzing trace with hash -530595531, now seen corresponding path program 8 times [2021-03-10 23:27:15,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:15,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331188721] [2021-03-10 23:27:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:15,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:15,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331188721] [2021-03-10 23:27:15,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285109208] [2021-03-10 23:27:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:15,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:15,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:15,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:15,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:16,007 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:16,007 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:16,007 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 23:27:16,007 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265519904] [2021-03-10 23:27:16,009 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:16,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:16,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:16,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:16,010 INFO L87 Difference]: Start difference. First operand 165 states and 376 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-03-10 23:27:16,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:16,229 INFO L93 Difference]: Finished difference Result 238 states and 512 transitions. [2021-03-10 23:27:16,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-03-10 23:27:16,230 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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 20 [2021-03-10 23:27:16,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:16,234 INFO L225 Difference]: With dead ends: 238 [2021-03-10 23:27:16,234 INFO L226 Difference]: Without dead ends: 235 [2021-03-10 23:27:16,235 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 205.1ms TimeCoverageRelationStatistics Valid=129, Invalid=333, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:27:16,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-03-10 23:27:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 183. [2021-03-10 23:27:16,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.340659340659341) internal successors, (426), 182 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:16,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 426 transitions. [2021-03-10 23:27:16,249 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 426 transitions. Word has length 20 [2021-03-10 23:27:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:16,251 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 426 transitions. [2021-03-10 23:27:16,251 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 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) [2021-03-10 23:27:16,251 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 426 transitions. [2021-03-10 23:27:16,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:27:16,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:16,253 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:16,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:16,467 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:16,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:16,467 INFO L82 PathProgramCache]: Analyzing trace with hash 420283757, now seen corresponding path program 9 times [2021-03-10 23:27:16,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:16,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329351657] [2021-03-10 23:27:16,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:16,512 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:16,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329351657] [2021-03-10 23:27:16,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964281303] [2021-03-10 23:27:16,512 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:16,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-03-10 23:27:16,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:16,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:16,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:16,615 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:16,615 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:16,616 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 11 [2021-03-10 23:27:16,616 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686645510] [2021-03-10 23:27:16,616 INFO L460 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-03-10 23:27:16,616 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:16,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-03-10 23:27:16,617 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-03-10 23:27:16,617 INFO L87 Difference]: Start difference. First operand 183 states and 426 transitions. Second operand has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:16,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:16,849 INFO L93 Difference]: Finished difference Result 302 states and 633 transitions. [2021-03-10 23:27:16,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-03-10 23:27:16,850 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:27:16,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:16,851 INFO L225 Difference]: With dead ends: 302 [2021-03-10 23:27:16,851 INFO L226 Difference]: Without dead ends: 300 [2021-03-10 23:27:16,852 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:27:16,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-03-10 23:27:16,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 183. [2021-03-10 23:27:16,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.3351648351648353) internal successors, (425), 182 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:16,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 425 transitions. [2021-03-10 23:27:16,861 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 425 transitions. Word has length 20 [2021-03-10 23:27:16,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:16,861 INFO L480 AbstractCegarLoop]: Abstraction has 183 states and 425 transitions. [2021-03-10 23:27:16,861 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:16,861 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 425 transitions. [2021-03-10 23:27:16,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-03-10 23:27:16,862 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:16,862 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:17,077 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:17,077 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:17,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:17,077 INFO L82 PathProgramCache]: Analyzing trace with hash -86062509, now seen corresponding path program 10 times [2021-03-10 23:27:17,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:17,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557924241] [2021-03-10 23:27:17,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:17,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:17,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557924241] [2021-03-10 23:27:17,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192126904] [2021-03-10 23:27:17,130 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:17,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:17,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:17,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 43 conjuncts, 7 conjunts are in the unsatisfiable core [2021-03-10 23:27:17,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:17,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:17,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-03-10 23:27:17,241 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138952111] [2021-03-10 23:27:17,242 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:17,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:17,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:17,244 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:17,244 INFO L87 Difference]: Start difference. First operand 183 states and 425 transitions. Second operand has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:17,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:17,522 INFO L93 Difference]: Finished difference Result 302 states and 642 transitions. [2021-03-10 23:27:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-03-10 23:27:17,522 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-03-10 23:27:17,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:17,524 INFO L225 Difference]: With dead ends: 302 [2021-03-10 23:27:17,524 INFO L226 Difference]: Without dead ends: 296 [2021-03-10 23:27:17,524 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 252.6ms TimeCoverageRelationStatistics Valid=197, Invalid=505, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:27:17,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-03-10 23:27:17,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 198. [2021-03-10 23:27:17,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 2.33502538071066) internal successors, (460), 197 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:17,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 460 transitions. [2021-03-10 23:27:17,531 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 460 transitions. Word has length 20 [2021-03-10 23:27:17,531 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:17,531 INFO L480 AbstractCegarLoop]: Abstraction has 198 states and 460 transitions. [2021-03-10 23:27:17,531 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 12 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:17,532 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 460 transitions. [2021-03-10 23:27:17,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:17,532 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:17,532 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:17,754 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-03-10 23:27:17,754 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:17,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:17,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1988809563, now seen corresponding path program 11 times [2021-03-10 23:27:17,755 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:17,755 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1623752480] [2021-03-10 23:27:17,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:17,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:17,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:17,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1623752480] [2021-03-10 23:27:17,911 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117896338] [2021-03-10 23:27:17,911 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:17,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-03-10 23:27:17,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:17,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:27:17,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:18,096 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:18,097 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:18,097 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:18,098 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:18,099 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-03-10 23:27:18,100 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:18,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:18,108 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:18,108 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-03-10 23:27:18,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:18,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:18,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:18,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099558397] [2021-03-10 23:27:18,128 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:18,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:18,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:18,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:18,129 INFO L87 Difference]: Start difference. First operand 198 states and 460 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:18,263 INFO L93 Difference]: Finished difference Result 282 states and 622 transitions. [2021-03-10 23:27:18,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:27:18,263 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 22 [2021-03-10 23:27:18,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:18,266 INFO L225 Difference]: With dead ends: 282 [2021-03-10 23:27:18,266 INFO L226 Difference]: Without dead ends: 257 [2021-03-10 23:27:18,268 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 167.1ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:18,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2021-03-10 23:27:18,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 214. [2021-03-10 23:27:18,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 2.3427230046948355) internal successors, (499), 213 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 499 transitions. [2021-03-10 23:27:18,275 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 499 transitions. Word has length 22 [2021-03-10 23:27:18,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:18,275 INFO L480 AbstractCegarLoop]: Abstraction has 214 states and 499 transitions. [2021-03-10 23:27:18,275 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,275 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 499 transitions. [2021-03-10 23:27:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:18,276 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:18,276 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:18,487 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-03-10 23:27:18,487 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:18,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:18,487 INFO L82 PathProgramCache]: Analyzing trace with hash 197742959, now seen corresponding path program 12 times [2021-03-10 23:27:18,487 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:18,487 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439315338] [2021-03-10 23:27:18,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:18,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:18,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439315338] [2021-03-10 23:27:18,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1821815320] [2021-03-10 23:27:18,624 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:18,645 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:18,645 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:18,646 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:27:18,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:18,769 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:18,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:18,770 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:18,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-03-10 23:27:18,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:18,777 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:18,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:18,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-03-10 23:27:18,800 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:18,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:18,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:18,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839518477] [2021-03-10 23:27:18,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:18,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:18,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:18,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:18,802 INFO L87 Difference]: Start difference. First operand 214 states and 499 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:18,916 INFO L93 Difference]: Finished difference Result 256 states and 583 transitions. [2021-03-10 23:27:18,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:27:18,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:18,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:18,917 INFO L225 Difference]: With dead ends: 256 [2021-03-10 23:27:18,917 INFO L226 Difference]: Without dead ends: 247 [2021-03-10 23:27:18,917 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 167.4ms TimeCoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-03-10 23:27:18,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 247 states. [2021-03-10 23:27:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 247 to 222. [2021-03-10 23:27:18,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 2.3529411764705883) internal successors, (520), 221 states have internal predecessors, (520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 520 transitions. [2021-03-10 23:27:18,924 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 520 transitions. Word has length 22 [2021-03-10 23:27:18,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:18,924 INFO L480 AbstractCegarLoop]: Abstraction has 222 states and 520 transitions. [2021-03-10 23:27:18,924 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:18,924 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 520 transitions. [2021-03-10 23:27:18,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:18,925 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:18,925 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:19,139 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-03-10 23:27:19,139 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:19,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:19,140 INFO L82 PathProgramCache]: Analyzing trace with hash 1748301367, now seen corresponding path program 13 times [2021-03-10 23:27:19,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:19,140 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380887333] [2021-03-10 23:27:19,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:19,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:19,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380887333] [2021-03-10 23:27:19,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527808737] [2021-03-10 23:27:19,259 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 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 [2021-03-10 23:27:19,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:19,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:27:19,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:19,426 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:19,427 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:19,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:19,428 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:19,430 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-03-10 23:27:19,431 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:19,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:19,437 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:19,437 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-03-10 23:27:19,454 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:19,454 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:19,454 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:19,454 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826657428] [2021-03-10 23:27:19,454 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:19,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:19,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:19,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:19,457 INFO L87 Difference]: Start difference. First operand 222 states and 520 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:19,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:19,607 INFO L93 Difference]: Finished difference Result 301 states and 659 transitions. [2021-03-10 23:27:19,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-03-10 23:27:19,607 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 22 [2021-03-10 23:27:19,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:19,609 INFO L225 Difference]: With dead ends: 301 [2021-03-10 23:27:19,609 INFO L226 Difference]: Without dead ends: 278 [2021-03-10 23:27:19,609 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 140.7ms TimeCoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:19,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2021-03-10 23:27:19,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 227. [2021-03-10 23:27:19,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 2.3584070796460175) internal successors, (533), 226 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:19,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 533 transitions. [2021-03-10 23:27:19,617 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 533 transitions. Word has length 22 [2021-03-10 23:27:19,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:19,617 INFO L480 AbstractCegarLoop]: Abstraction has 227 states and 533 transitions. [2021-03-10 23:27:19,617 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:19,618 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 533 transitions. [2021-03-10 23:27:19,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-03-10 23:27:19,618 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:19,618 INFO L519 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:19,834 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:19,834 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:19,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:19,835 INFO L82 PathProgramCache]: Analyzing trace with hash 343984883, now seen corresponding path program 14 times [2021-03-10 23:27:19,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:19,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245684287] [2021-03-10 23:27:19,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:19,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:19,938 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:19,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245684287] [2021-03-10 23:27:19,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459514213] [2021-03-10 23:27:19,939 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 [2021-03-10 23:27:19,963 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:19,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:19,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 19 conjunts are in the unsatisfiable core [2021-03-10 23:27:19,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:20,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:20,072 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:20,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:20,073 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:20,074 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 7 [2021-03-10 23:27:20,075 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:20,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:20,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:20,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:7 [2021-03-10 23:27:20,102 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:20,103 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:20,103 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-03-10 23:27:20,103 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888339984] [2021-03-10 23:27:20,103 INFO L460 AbstractCegarLoop]: Interpolant automaton has 13 states [2021-03-10 23:27:20,103 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:20,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-03-10 23:27:20,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:20,104 INFO L87 Difference]: Start difference. First operand 227 states and 533 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:20,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:20,237 INFO L93 Difference]: Finished difference Result 320 states and 703 transitions. [2021-03-10 23:27:20,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-03-10 23:27:20,238 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-03-10 23:27:20,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:20,239 INFO L225 Difference]: With dead ends: 320 [2021-03-10 23:27:20,239 INFO L226 Difference]: Without dead ends: 313 [2021-03-10 23:27:20,240 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 138.6ms TimeCoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-03-10 23:27:20,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-03-10 23:27:20,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 246. [2021-03-10 23:27:20,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.363265306122449) internal successors, (579), 245 states have internal predecessors, (579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:20,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 579 transitions. [2021-03-10 23:27:20,246 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 579 transitions. Word has length 22 [2021-03-10 23:27:20,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:20,247 INFO L480 AbstractCegarLoop]: Abstraction has 246 states and 579 transitions. [2021-03-10 23:27:20,247 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:20,247 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 579 transitions. [2021-03-10 23:27:20,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:20,247 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:20,247 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:20,467 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:20,467 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:20,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:20,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1412718173, now seen corresponding path program 15 times [2021-03-10 23:27:20,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:20,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888081147] [2021-03-10 23:27:20,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:20,535 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:20,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888081147] [2021-03-10 23:27:20,535 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903987367] [2021-03-10 23:27:20,536 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 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 [2021-03-10 23:27:20,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:27:20,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:20,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:20,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:20,703 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:20,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:20,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-03-10 23:27:20,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786282382] [2021-03-10 23:27:20,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:27:20,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:20,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:27:20,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:20,704 INFO L87 Difference]: Start difference. First operand 246 states and 579 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:21,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:21,223 INFO L93 Difference]: Finished difference Result 495 states and 1055 transitions. [2021-03-10 23:27:21,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:27:21,224 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:21,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:21,227 INFO L225 Difference]: With dead ends: 495 [2021-03-10 23:27:21,227 INFO L226 Difference]: Without dead ends: 495 [2021-03-10 23:27:21,227 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 435.6ms TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:27:21,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-03-10 23:27:21,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 238. [2021-03-10 23:27:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 2.3628691983122363) internal successors, (560), 237 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:21,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 560 transitions. [2021-03-10 23:27:21,237 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 560 transitions. Word has length 24 [2021-03-10 23:27:21,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:21,238 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 560 transitions. [2021-03-10 23:27:21,238 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 17 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:21,238 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 560 transitions. [2021-03-10 23:27:21,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:21,239 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:21,239 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:21,457 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:21,457 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:21,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:21,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1474117159, now seen corresponding path program 16 times [2021-03-10 23:27:21,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:21,458 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [593271771] [2021-03-10 23:27:21,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:21,533 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:21,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [593271771] [2021-03-10 23:27:21,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291555661] [2021-03-10 23:27:21,533 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:21,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:21,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:21,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:21,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:21,700 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:21,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:21,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:21,700 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344899271] [2021-03-10 23:27:21,701 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:21,701 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:21,701 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:21,701 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:21,702 INFO L87 Difference]: Start difference. First operand 238 states and 560 transitions. Second operand has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:22,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:22,291 INFO L93 Difference]: Finished difference Result 696 states and 1431 transitions. [2021-03-10 23:27:22,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:27:22,292 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 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 24 [2021-03-10 23:27:22,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:22,294 INFO L225 Difference]: With dead ends: 696 [2021-03-10 23:27:22,294 INFO L226 Difference]: Without dead ends: 652 [2021-03-10 23:27:22,295 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 551.8ms TimeCoverageRelationStatistics Valid=449, Invalid=1357, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:27:22,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-03-10 23:27:22,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 294. [2021-03-10 23:27:22,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 2.378839590443686) internal successors, (697), 293 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:22,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 697 transitions. [2021-03-10 23:27:22,307 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 697 transitions. Word has length 24 [2021-03-10 23:27:22,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:22,307 INFO L480 AbstractCegarLoop]: Abstraction has 294 states and 697 transitions. [2021-03-10 23:27:22,307 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.2941176470588234) internal successors, (39), 16 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:22,307 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 697 transitions. [2021-03-10 23:27:22,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:22,308 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:22,308 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:22,522 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-03-10 23:27:22,522 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:22,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:22,522 INFO L82 PathProgramCache]: Analyzing trace with hash -964250137, now seen corresponding path program 17 times [2021-03-10 23:27:22,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:22,523 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242351530] [2021-03-10 23:27:22,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:22,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:22,570 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:22,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242351530] [2021-03-10 23:27:22,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621578330] [2021-03-10 23:27:22,570 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:22,589 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:22,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:22,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:22,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:22,708 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:22,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:22,709 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-03-10 23:27:22,709 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499366897] [2021-03-10 23:27:22,709 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:22,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:22,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:22,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:22,710 INFO L87 Difference]: Start difference. First operand 294 states and 697 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:23,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:23,203 INFO L93 Difference]: Finished difference Result 654 states and 1426 transitions. [2021-03-10 23:27:23,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:27:23,204 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:23,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:23,207 INFO L225 Difference]: With dead ends: 654 [2021-03-10 23:27:23,207 INFO L226 Difference]: Without dead ends: 652 [2021-03-10 23:27:23,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 428.7ms TimeCoverageRelationStatistics Valid=387, Invalid=945, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:27:23,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 652 states. [2021-03-10 23:27:23,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 652 to 362. [2021-03-10 23:27:23,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4238227146814406) internal successors, (875), 361 states have internal predecessors, (875), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:23,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 875 transitions. [2021-03-10 23:27:23,220 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 875 transitions. Word has length 24 [2021-03-10 23:27:23,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:23,220 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 875 transitions. [2021-03-10 23:27:23,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:23,220 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 875 transitions. [2021-03-10 23:27:23,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:23,221 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:23,221 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:23,443 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-03-10 23:27:23,444 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:23,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:23,444 INFO L82 PathProgramCache]: Analyzing trace with hash -1295928925, now seen corresponding path program 18 times [2021-03-10 23:27:23,444 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:23,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397612821] [2021-03-10 23:27:23,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:23,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:23,487 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:23,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397612821] [2021-03-10 23:27:23,487 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187047460] [2021-03-10 23:27:23,487 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:23,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:27:23,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:23,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:23,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:23,662 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:23,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:23,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-03-10 23:27:23,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472480952] [2021-03-10 23:27:23,663 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:23,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:23,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:23,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:23,664 INFO L87 Difference]: Start difference. First operand 362 states and 875 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:24,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:24,057 INFO L93 Difference]: Finished difference Result 539 states and 1206 transitions. [2021-03-10 23:27:24,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:27:24,058 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:24,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:24,060 INFO L225 Difference]: With dead ends: 539 [2021-03-10 23:27:24,060 INFO L226 Difference]: Without dead ends: 535 [2021-03-10 23:27:24,060 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 381.1ms TimeCoverageRelationStatistics Valid=356, Invalid=976, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:27:24,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-03-10 23:27:24,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 362. [2021-03-10 23:27:24,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 362 states, 361 states have (on average 2.4210526315789473) internal successors, (874), 361 states have internal predecessors, (874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:24,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 362 states to 362 states and 874 transitions. [2021-03-10 23:27:24,071 INFO L78 Accepts]: Start accepts. Automaton has 362 states and 874 transitions. Word has length 24 [2021-03-10 23:27:24,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:24,071 INFO L480 AbstractCegarLoop]: Abstraction has 362 states and 874 transitions. [2021-03-10 23:27:24,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:24,071 INFO L276 IsEmpty]: Start isEmpty. Operand 362 states and 874 transitions. [2021-03-10 23:27:24,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:24,072 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:24,072 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:24,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-03-10 23:27:24,292 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:24,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:24,293 INFO L82 PathProgramCache]: Analyzing trace with hash -1782884239, now seen corresponding path program 19 times [2021-03-10 23:27:24,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:24,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120287877] [2021-03-10 23:27:24,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:24,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120287877] [2021-03-10 23:27:24,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828245904] [2021-03-10 23:27:24,340 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:24,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:24,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:24,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:24,461 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:24,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:24,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-03-10 23:27:24,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959036366] [2021-03-10 23:27:24,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:24,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:24,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:24,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:24,462 INFO L87 Difference]: Start difference. First operand 362 states and 874 transitions. Second operand has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:24,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:24,795 INFO L93 Difference]: Finished difference Result 593 states and 1318 transitions. [2021-03-10 23:27:24,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:27:24,796 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 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 24 [2021-03-10 23:27:24,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:24,798 INFO L225 Difference]: With dead ends: 593 [2021-03-10 23:27:24,798 INFO L226 Difference]: Without dead ends: 584 [2021-03-10 23:27:24,798 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 301.2ms TimeCoverageRelationStatistics Valid=235, Invalid=695, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:27:24,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2021-03-10 23:27:24,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 383. [2021-03-10 23:27:24,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 383 states, 382 states have (on average 2.4424083769633507) internal successors, (933), 382 states have internal predecessors, (933), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 383 states to 383 states and 933 transitions. [2021-03-10 23:27:24,808 INFO L78 Accepts]: Start accepts. Automaton has 383 states and 933 transitions. Word has length 24 [2021-03-10 23:27:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:24,808 INFO L480 AbstractCegarLoop]: Abstraction has 383 states and 933 transitions. [2021-03-10 23:27:24,808 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.6) internal successors, (39), 14 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:24,809 INFO L276 IsEmpty]: Start isEmpty. Operand 383 states and 933 transitions. [2021-03-10 23:27:24,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:24,809 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:24,809 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:25,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-03-10 23:27:25,031 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:25,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:25,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1338351217, now seen corresponding path program 20 times [2021-03-10 23:27:25,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:25,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653643033] [2021-03-10 23:27:25,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:25,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:25,081 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:25,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653643033] [2021-03-10 23:27:25,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569174451] [2021-03-10 23:27:25,082 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:25,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:25,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:25,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:25,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:25,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:25,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-10 23:27:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319472309] [2021-03-10 23:27:25,231 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:25,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:25,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:25,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:25,231 INFO L87 Difference]: Start difference. First operand 383 states and 933 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:25,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:25,645 INFO L93 Difference]: Finished difference Result 701 states and 1556 transitions. [2021-03-10 23:27:25,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:27:25,645 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:25,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:25,647 INFO L225 Difference]: With dead ends: 701 [2021-03-10 23:27:25,647 INFO L226 Difference]: Without dead ends: 687 [2021-03-10 23:27:25,648 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=382, Invalid=1100, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:27:25,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2021-03-10 23:27:25,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 386. [2021-03-10 23:27:25,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 386 states, 385 states have (on average 2.4363636363636365) internal successors, (938), 385 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:25,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 386 states to 386 states and 938 transitions. [2021-03-10 23:27:25,658 INFO L78 Accepts]: Start accepts. Automaton has 386 states and 938 transitions. Word has length 24 [2021-03-10 23:27:25,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:25,658 INFO L480 AbstractCegarLoop]: Abstraction has 386 states and 938 transitions. [2021-03-10 23:27:25,658 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:25,658 INFO L276 IsEmpty]: Start isEmpty. Operand 386 states and 938 transitions. [2021-03-10 23:27:25,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:25,659 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:25,659 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:25,875 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-03-10 23:27:25,875 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:25,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:25,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1334899385, now seen corresponding path program 21 times [2021-03-10 23:27:25,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:25,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633090763] [2021-03-10 23:27:25,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:25,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:25,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633090763] [2021-03-10 23:27:25,928 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367929666] [2021-03-10 23:27:25,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:25,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:27:25,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:25,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:25,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:26,053 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:26,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:26,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:26,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [735164113] [2021-03-10 23:27:26,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:26,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:26,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:26,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:26,054 INFO L87 Difference]: Start difference. First operand 386 states and 938 transitions. Second operand has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:26,502 INFO L93 Difference]: Finished difference Result 817 states and 1787 transitions. [2021-03-10 23:27:26,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:27:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:26,505 INFO L225 Difference]: With dead ends: 817 [2021-03-10 23:27:26,505 INFO L226 Difference]: Without dead ends: 817 [2021-03-10 23:27:26,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 405.0ms TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:27:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 817 states. [2021-03-10 23:27:26,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 817 to 408. [2021-03-10 23:27:26,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.407862407862408) internal successors, (980), 407 states have internal predecessors, (980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 980 transitions. [2021-03-10 23:27:26,516 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 980 transitions. Word has length 24 [2021-03-10 23:27:26,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:26,516 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 980 transitions. [2021-03-10 23:27:26,516 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 16 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:26,516 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 980 transitions. [2021-03-10 23:27:26,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:26,517 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:26,517 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:26,735 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:26,735 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2049905863, now seen corresponding path program 22 times [2021-03-10 23:27:26,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:26,736 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878279129] [2021-03-10 23:27:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:26,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:26,783 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:26,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878279129] [2021-03-10 23:27:26,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599378759] [2021-03-10 23:27:26,784 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:26,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:26,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:26,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:26,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:26,966 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:26,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:26,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-10 23:27:26,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159450717] [2021-03-10 23:27:26,966 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:26,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:26,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:26,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:26,967 INFO L87 Difference]: Start difference. First operand 408 states and 980 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:27,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:27,380 INFO L93 Difference]: Finished difference Result 578 states and 1266 transitions. [2021-03-10 23:27:27,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-03-10 23:27:27,380 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:27,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:27,381 INFO L225 Difference]: With dead ends: 578 [2021-03-10 23:27:27,381 INFO L226 Difference]: Without dead ends: 560 [2021-03-10 23:27:27,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 381.8ms TimeCoverageRelationStatistics Valid=286, Invalid=904, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:27:27,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2021-03-10 23:27:27,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 408. [2021-03-10 23:27:27,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 407 states have (on average 2.398034398034398) internal successors, (976), 407 states have internal predecessors, (976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:27,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 976 transitions. [2021-03-10 23:27:27,392 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 976 transitions. Word has length 24 [2021-03-10 23:27:27,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:27,392 INFO L480 AbstractCegarLoop]: Abstraction has 408 states and 976 transitions. [2021-03-10 23:27:27,392 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:27,392 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 976 transitions. [2021-03-10 23:27:27,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:27,393 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:27,393 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:27,607 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-03-10 23:27:27,607 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:27,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:27,607 INFO L82 PathProgramCache]: Analyzing trace with hash -275355531, now seen corresponding path program 23 times [2021-03-10 23:27:27,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:27,608 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211546921] [2021-03-10 23:27:27,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:27,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:27,656 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:27,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211546921] [2021-03-10 23:27:27,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46657770] [2021-03-10 23:27:27,656 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:27,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:27,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:27,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:27,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:27,816 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:27,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:27,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-10 23:27:27,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673600449] [2021-03-10 23:27:27,817 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:27,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:27,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:27,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:27,818 INFO L87 Difference]: Start difference. First operand 408 states and 976 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:28,297 INFO L93 Difference]: Finished difference Result 943 states and 2146 transitions. [2021-03-10 23:27:28,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:27:28,297 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:28,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:28,299 INFO L225 Difference]: With dead ends: 943 [2021-03-10 23:27:28,299 INFO L226 Difference]: Without dead ends: 943 [2021-03-10 23:27:28,300 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 460.1ms TimeCoverageRelationStatistics Valid=520, Invalid=1202, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:27:28,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-03-10 23:27:28,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 633. [2021-03-10 23:27:28,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.4857594936708862) internal successors, (1571), 632 states have internal predecessors, (1571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:28,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1571 transitions. [2021-03-10 23:27:28,313 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1571 transitions. Word has length 24 [2021-03-10 23:27:28,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:28,313 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1571 transitions. [2021-03-10 23:27:28,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 15 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:28,313 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1571 transitions. [2021-03-10 23:27:28,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:28,314 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:28,314 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:28,531 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:28,531 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:28,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:28,532 INFO L82 PathProgramCache]: Analyzing trace with hash -2027436755, now seen corresponding path program 24 times [2021-03-10 23:27:28,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:28,532 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649022459] [2021-03-10 23:27:28,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:28,575 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649022459] [2021-03-10 23:27:28,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718347651] [2021-03-10 23:27:28,575 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 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:28,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:28,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:28,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:28,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:28,735 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:28,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:28,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 14 [2021-03-10 23:27:28,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309890939] [2021-03-10 23:27:28,736 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-03-10 23:27:28,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:28,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-03-10 23:27:28,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2021-03-10 23:27:28,736 INFO L87 Difference]: Start difference. First operand 633 states and 1571 transitions. Second operand has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:29,083 INFO L93 Difference]: Finished difference Result 910 states and 2079 transitions. [2021-03-10 23:27:29,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-03-10 23:27:29,083 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:29,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:29,086 INFO L225 Difference]: With dead ends: 910 [2021-03-10 23:27:29,086 INFO L226 Difference]: Without dead ends: 906 [2021-03-10 23:27:29,086 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 321.8ms TimeCoverageRelationStatistics Valid=342, Invalid=848, Unknown=0, NotChecked=0, Total=1190 [2021-03-10 23:27:29,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 906 states. [2021-03-10 23:27:29,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 906 to 633. [2021-03-10 23:27:29,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 633 states, 632 states have (on average 2.481012658227848) internal successors, (1568), 632 states have internal predecessors, (1568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 633 states to 633 states and 1568 transitions. [2021-03-10 23:27:29,100 INFO L78 Accepts]: Start accepts. Automaton has 633 states and 1568 transitions. Word has length 24 [2021-03-10 23:27:29,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:29,100 INFO L480 AbstractCegarLoop]: Abstraction has 633 states and 1568 transitions. [2021-03-10 23:27:29,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.533333333333333) internal successors, (38), 14 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,101 INFO L276 IsEmpty]: Start isEmpty. Operand 633 states and 1568 transitions. [2021-03-10 23:27:29,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:29,102 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:29,102 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:29,319 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-03-10 23:27:29,319 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:29,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:29,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1761184275, now seen corresponding path program 25 times [2021-03-10 23:27:29,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:29,320 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1019180173] [2021-03-10 23:27:29,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:29,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:29,370 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:27:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1019180173] [2021-03-10 23:27:29,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026718076] [2021-03-10 23:27:29,370 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:29,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:29,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 5 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:29,500 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:29,500 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-03-10 23:27:29,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402581794] [2021-03-10 23:27:29,500 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-03-10 23:27:29,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:29,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-03-10 23:27:29,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2021-03-10 23:27:29,501 INFO L87 Difference]: Start difference. First operand 633 states and 1568 transitions. Second operand has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:29,917 INFO L93 Difference]: Finished difference Result 997 states and 2276 transitions. [2021-03-10 23:27:29,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-03-10 23:27:29,918 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:29,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:29,920 INFO L225 Difference]: With dead ends: 997 [2021-03-10 23:27:29,920 INFO L226 Difference]: Without dead ends: 985 [2021-03-10 23:27:29,921 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 397.1ms TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2021-03-10 23:27:29,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 985 states. [2021-03-10 23:27:29,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 985 to 684. [2021-03-10 23:27:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 684 states, 683 states have (on average 2.4963396778916547) internal successors, (1705), 683 states have internal predecessors, (1705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 1705 transitions. [2021-03-10 23:27:29,935 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 1705 transitions. Word has length 24 [2021-03-10 23:27:29,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:29,935 INFO L480 AbstractCegarLoop]: Abstraction has 684 states and 1705 transitions. [2021-03-10 23:27:29,935 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.375) internal successors, (38), 15 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:29,935 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 1705 transitions. [2021-03-10 23:27:29,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-03-10 23:27:29,936 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:29,936 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:30,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:30,157 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:30,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:30,157 INFO L82 PathProgramCache]: Analyzing trace with hash 1533962895, now seen corresponding path program 26 times [2021-03-10 23:27:30,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:30,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446135657] [2021-03-10 23:27:30,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:30,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:30,209 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446135657] [2021-03-10 23:27:30,209 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810600122] [2021-03-10 23:27:30,209 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:30,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:30,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:30,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 9 conjunts are in the unsatisfiable core [2021-03-10 23:27:30,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:30,357 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:30,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:30,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-03-10 23:27:30,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651172433] [2021-03-10 23:27:30,358 INFO L460 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-03-10 23:27:30,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:30,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-03-10 23:27:30,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-03-10 23:27:30,359 INFO L87 Difference]: Start difference. First operand 684 states and 1705 transitions. Second operand has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:30,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:30,793 INFO L93 Difference]: Finished difference Result 1028 states and 2383 transitions. [2021-03-10 23:27:30,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-03-10 23:27:30,794 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-03-10 23:27:30,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:30,797 INFO L225 Difference]: With dead ends: 1028 [2021-03-10 23:27:30,797 INFO L226 Difference]: Without dead ends: 1008 [2021-03-10 23:27:30,797 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 410.4ms TimeCoverageRelationStatistics Valid=419, Invalid=1221, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:27:30,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2021-03-10 23:27:30,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 740. [2021-03-10 23:27:30,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 740 states, 739 states have (on average 2.5087956698240865) internal successors, (1854), 739 states have internal predecessors, (1854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:30,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 740 states to 740 states and 1854 transitions. [2021-03-10 23:27:30,810 INFO L78 Accepts]: Start accepts. Automaton has 740 states and 1854 transitions. Word has length 24 [2021-03-10 23:27:30,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:30,810 INFO L480 AbstractCegarLoop]: Abstraction has 740 states and 1854 transitions. [2021-03-10 23:27:30,810 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:30,810 INFO L276 IsEmpty]: Start isEmpty. Operand 740 states and 1854 transitions. [2021-03-10 23:27:30,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:30,811 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:30,812 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:31,027 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-03-10 23:27:31,027 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:31,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:31,028 INFO L82 PathProgramCache]: Analyzing trace with hash 1047161765, now seen corresponding path program 27 times [2021-03-10 23:27:31,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:31,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1558741808] [2021-03-10 23:27:31,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:31,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:31,327 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:31,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1558741808] [2021-03-10 23:27:31,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408046227] [2021-03-10 23:27:31,327 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:31,350 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:27:31,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:31,351 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 23:27:31,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:31,867 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:31,869 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:31,870 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:31,897 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:31,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-03-10 23:27:31,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:27:31,980 INFO L628 ElimStorePlain]: treesize reduction 52, result has 40.2 percent of original size [2021-03-10 23:27:31,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:27:31,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-03-10 23:27:32,050 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:32,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:32,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-03-10 23:27:32,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238246338] [2021-03-10 23:27:32,051 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:27:32,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:32,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:27:32,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=555, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:27:32,052 INFO L87 Difference]: Start difference. First operand 740 states and 1854 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:33,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:33,394 INFO L93 Difference]: Finished difference Result 1044 states and 2520 transitions. [2021-03-10 23:27:33,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:27:33,394 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 26 [2021-03-10 23:27:33,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:33,397 INFO L225 Difference]: With dead ends: 1044 [2021-03-10 23:27:33,397 INFO L226 Difference]: Without dead ends: 1030 [2021-03-10 23:27:33,398 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1292.6ms TimeCoverageRelationStatistics Valid=273, Invalid=1619, Unknown=0, NotChecked=0, Total=1892 [2021-03-10 23:27:33,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1030 states. [2021-03-10 23:27:33,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1030 to 756. [2021-03-10 23:27:33,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.508609271523179) internal successors, (1894), 755 states have internal predecessors, (1894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1894 transitions. [2021-03-10 23:27:33,411 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1894 transitions. Word has length 26 [2021-03-10 23:27:33,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:33,411 INFO L480 AbstractCegarLoop]: Abstraction has 756 states and 1894 transitions. [2021-03-10 23:27:33,411 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:33,411 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1894 transitions. [2021-03-10 23:27:33,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:33,412 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:33,412 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:33,633 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:33,634 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:33,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:33,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1487367885, now seen corresponding path program 28 times [2021-03-10 23:27:33,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:33,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612403602] [2021-03-10 23:27:33,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:33,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:33,935 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:33,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612403602] [2021-03-10 23:27:33,935 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [889014152] [2021-03-10 23:27:33,935 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 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:33,952 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:33,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:33,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:33,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:34,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:34,168 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:34,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:34,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:34,170 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:34,171 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:34,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:34,173 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:34,179 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:34,180 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:34,180 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:34,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:34,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 23:27:34,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673436782] [2021-03-10 23:27:34,202 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:27:34,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:27:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:27:34,203 INFO L87 Difference]: Start difference. First operand 756 states and 1894 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:35,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:35,204 INFO L93 Difference]: Finished difference Result 1114 states and 2686 transitions. [2021-03-10 23:27:35,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:27:35,204 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 26 [2021-03-10 23:27:35,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:35,207 INFO L225 Difference]: With dead ends: 1114 [2021-03-10 23:27:35,207 INFO L226 Difference]: Without dead ends: 1066 [2021-03-10 23:27:35,207 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 333 ImplicationChecksByTransitivity, 1071.8ms TimeCoverageRelationStatistics Valid=251, Invalid=1309, Unknown=0, NotChecked=0, Total=1560 [2021-03-10 23:27:35,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1066 states. [2021-03-10 23:27:35,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1066 to 785. [2021-03-10 23:27:35,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 785 states, 784 states have (on average 2.489795918367347) internal successors, (1952), 784 states have internal predecessors, (1952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:35,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 785 states to 785 states and 1952 transitions. [2021-03-10 23:27:35,220 INFO L78 Accepts]: Start accepts. Automaton has 785 states and 1952 transitions. Word has length 26 [2021-03-10 23:27:35,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:35,220 INFO L480 AbstractCegarLoop]: Abstraction has 785 states and 1952 transitions. [2021-03-10 23:27:35,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:35,220 INFO L276 IsEmpty]: Start isEmpty. Operand 785 states and 1952 transitions. [2021-03-10 23:27:35,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:35,222 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:35,222 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:35,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-03-10 23:27:35,443 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:35,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:35,443 INFO L82 PathProgramCache]: Analyzing trace with hash 15104427, now seen corresponding path program 29 times [2021-03-10 23:27:35,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:35,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908195293] [2021-03-10 23:27:35,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:35,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:35,680 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:35,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908195293] [2021-03-10 23:27:35,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195497129] [2021-03-10 23:27:35,680 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 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 [2021-03-10 23:27:35,711 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:27:35,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:35,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:35,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:35,876 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:35,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:35,878 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:35,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:35,879 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:35,880 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:35,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:35,881 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:35,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:35,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:35,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:35,915 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:35,915 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 23:27:35,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77010454] [2021-03-10 23:27:35,915 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:27:35,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:35,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:27:35,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:27:35,916 INFO L87 Difference]: Start difference. First operand 785 states and 1952 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:37,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:37,271 INFO L93 Difference]: Finished difference Result 1322 states and 3150 transitions. [2021-03-10 23:27:37,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:27:37,272 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 26 [2021-03-10 23:27:37,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:37,275 INFO L225 Difference]: With dead ends: 1322 [2021-03-10 23:27:37,275 INFO L226 Difference]: Without dead ends: 1313 [2021-03-10 23:27:37,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1307.2ms TimeCoverageRelationStatistics Valid=369, Invalid=2081, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:27:37,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1313 states. [2021-03-10 23:27:37,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1313 to 825. [2021-03-10 23:27:37,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.491504854368932) internal successors, (2053), 824 states have internal predecessors, (2053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:37,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 2053 transitions. [2021-03-10 23:27:37,290 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 2053 transitions. Word has length 26 [2021-03-10 23:27:37,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:37,290 INFO L480 AbstractCegarLoop]: Abstraction has 825 states and 2053 transitions. [2021-03-10 23:27:37,290 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:37,290 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 2053 transitions. [2021-03-10 23:27:37,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:37,292 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:37,292 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:37,513 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:37,513 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:37,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:37,513 INFO L82 PathProgramCache]: Analyzing trace with hash 889695859, now seen corresponding path program 30 times [2021-03-10 23:27:37,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:37,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956359629] [2021-03-10 23:27:37,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:37,746 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:37,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956359629] [2021-03-10 23:27:37,747 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525060480] [2021-03-10 23:27:37,747 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:37,779 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:27:37,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:37,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:37,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:37,987 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:37,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:37,988 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:37,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:37,990 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:37,991 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:37,992 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:37,998 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:37,999 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:37,999 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:38,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:38,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:38,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 23:27:38,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383010796] [2021-03-10 23:27:38,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:27:38,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:38,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:27:38,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:27:38,021 INFO L87 Difference]: Start difference. First operand 825 states and 2053 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:38,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:38,748 INFO L93 Difference]: Finished difference Result 1068 states and 2530 transitions. [2021-03-10 23:27:38,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-03-10 23:27:38,749 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 26 [2021-03-10 23:27:38,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:38,751 INFO L225 Difference]: With dead ends: 1068 [2021-03-10 23:27:38,751 INFO L226 Difference]: Without dead ends: 1031 [2021-03-10 23:27:38,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 734.3ms TimeCoverageRelationStatistics Valid=203, Invalid=1057, Unknown=0, NotChecked=0, Total=1260 [2021-03-10 23:27:38,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1031 states. [2021-03-10 23:27:38,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1031 to 879. [2021-03-10 23:27:38,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 879 states, 878 states have (on average 2.503416856492027) internal successors, (2198), 878 states have internal predecessors, (2198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 879 states to 879 states and 2198 transitions. [2021-03-10 23:27:38,764 INFO L78 Accepts]: Start accepts. Automaton has 879 states and 2198 transitions. Word has length 26 [2021-03-10 23:27:38,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:38,765 INFO L480 AbstractCegarLoop]: Abstraction has 879 states and 2198 transitions. [2021-03-10 23:27:38,765 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 879 states and 2198 transitions. [2021-03-10 23:27:38,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:38,766 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:38,766 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:38,979 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,32 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:38,979 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:38,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:38,979 INFO L82 PathProgramCache]: Analyzing trace with hash -1180327377, now seen corresponding path program 31 times [2021-03-10 23:27:38,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:38,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318478473] [2021-03-10 23:27:38,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:38,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:39,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318478473] [2021-03-10 23:27:39,240 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1136574149] [2021-03-10 23:27:39,240 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:39,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:39,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:39,445 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:39,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:39,446 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:39,447 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:39,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:39,448 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:39,449 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:39,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:39,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:39,457 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:39,458 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:39,458 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:39,479 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:39,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:39,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 23:27:39,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095523909] [2021-03-10 23:27:39,479 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:27:39,479 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:39,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:27:39,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:27:39,481 INFO L87 Difference]: Start difference. First operand 879 states and 2198 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:40,671 INFO L93 Difference]: Finished difference Result 1224 states and 2892 transitions. [2021-03-10 23:27:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:27:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 26 [2021-03-10 23:27:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:40,674 INFO L225 Difference]: With dead ends: 1224 [2021-03-10 23:27:40,674 INFO L226 Difference]: Without dead ends: 1172 [2021-03-10 23:27:40,675 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 1181.3ms TimeCoverageRelationStatistics Valid=334, Invalid=1828, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:27:40,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1172 states. [2021-03-10 23:27:40,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1172 to 940. [2021-03-10 23:27:40,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.505857294994675) internal successors, (2353), 939 states have internal predecessors, (2353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:40,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2353 transitions. [2021-03-10 23:27:40,688 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2353 transitions. Word has length 26 [2021-03-10 23:27:40,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:40,688 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2353 transitions. [2021-03-10 23:27:40,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:40,688 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2353 transitions. [2021-03-10 23:27:40,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:40,690 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:40,690 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:40,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-03-10 23:27:40,895 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash -514620625, now seen corresponding path program 32 times [2021-03-10 23:27:40,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:40,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492098575] [2021-03-10 23:27:40,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:40,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:41,144 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:41,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492098575] [2021-03-10 23:27:41,144 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228704013] [2021-03-10 23:27:41,144 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:41,163 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:41,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:41,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:41,164 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:41,327 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:41,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:41,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:41,329 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:41,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:41,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:41,331 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:41,332 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:41,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:41,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:41,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:41,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:41,358 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:41,359 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:41,359 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 23:27:41,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677215508] [2021-03-10 23:27:41,359 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:27:41,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:41,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:27:41,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:27:41,360 INFO L87 Difference]: Start difference. First operand 940 states and 2353 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:42,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:42,698 INFO L93 Difference]: Finished difference Result 1036 states and 2533 transitions. [2021-03-10 23:27:42,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:27:42,699 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 26 [2021-03-10 23:27:42,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:42,702 INFO L225 Difference]: With dead ends: 1036 [2021-03-10 23:27:42,702 INFO L226 Difference]: Without dead ends: 1014 [2021-03-10 23:27:42,703 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1227.8ms TimeCoverageRelationStatistics Valid=294, Invalid=1776, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:27:42,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1014 states. [2021-03-10 23:27:42,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1014 to 940. [2021-03-10 23:27:42,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 940 states, 939 states have (on average 2.49307774227902) internal successors, (2341), 939 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:42,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 940 states to 940 states and 2341 transitions. [2021-03-10 23:27:42,714 INFO L78 Accepts]: Start accepts. Automaton has 940 states and 2341 transitions. Word has length 26 [2021-03-10 23:27:42,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:42,715 INFO L480 AbstractCegarLoop]: Abstraction has 940 states and 2341 transitions. [2021-03-10 23:27:42,715 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:42,715 INFO L276 IsEmpty]: Start isEmpty. Operand 940 states and 2341 transitions. [2021-03-10 23:27:42,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:42,716 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:42,717 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:42,927 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:42,927 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:42,928 INFO L82 PathProgramCache]: Analyzing trace with hash 102747963, now seen corresponding path program 33 times [2021-03-10 23:27:42,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:42,928 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [354070826] [2021-03-10 23:27:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:42,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:43,211 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:43,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [354070826] [2021-03-10 23:27:43,211 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534279093] [2021-03-10 23:27:43,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:43,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-03-10 23:27:43,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:43,235 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 23:27:43,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:43,669 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:43,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:43,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:43,694 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:43,695 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-03-10 23:27:43,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:27:43,755 INFO L628 ElimStorePlain]: treesize reduction 38, result has 47.9 percent of original size [2021-03-10 23:27:43,761 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:27:43,761 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:71, output treesize:22 [2021-03-10 23:27:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:43,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:43,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 25 [2021-03-10 23:27:43,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942701439] [2021-03-10 23:27:43,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:27:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:27:43,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:27:43,824 INFO L87 Difference]: Start difference. First operand 940 states and 2341 transitions. Second operand has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:45,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:45,083 INFO L93 Difference]: Finished difference Result 1252 states and 3030 transitions. [2021-03-10 23:27:45,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:27:45,083 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 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 26 [2021-03-10 23:27:45,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:45,087 INFO L225 Difference]: With dead ends: 1252 [2021-03-10 23:27:45,087 INFO L226 Difference]: Without dead ends: 1238 [2021-03-10 23:27:45,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1322.5ms TimeCoverageRelationStatistics Valid=312, Invalid=1850, Unknown=0, NotChecked=0, Total=2162 [2021-03-10 23:27:45,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1238 states. [2021-03-10 23:27:45,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1238 to 962. [2021-03-10 23:27:45,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 962 states, 961 states have (on average 2.502601456815817) internal successors, (2405), 961 states have internal predecessors, (2405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:45,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 962 states to 962 states and 2405 transitions. [2021-03-10 23:27:45,103 INFO L78 Accepts]: Start accepts. Automaton has 962 states and 2405 transitions. Word has length 26 [2021-03-10 23:27:45,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:45,103 INFO L480 AbstractCegarLoop]: Abstraction has 962 states and 2405 transitions. [2021-03-10 23:27:45,103 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 1.7307692307692308) internal successors, (45), 25 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:45,103 INFO L276 IsEmpty]: Start isEmpty. Operand 962 states and 2405 transitions. [2021-03-10 23:27:45,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:45,105 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:45,105 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:45,311 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-03-10 23:27:45,312 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:45,312 INFO L82 PathProgramCache]: Analyzing trace with hash -619723785, now seen corresponding path program 34 times [2021-03-10 23:27:45,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:45,312 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105075139] [2021-03-10 23:27:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:45,596 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:45,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105075139] [2021-03-10 23:27:45,596 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932240998] [2021-03-10 23:27:45,596 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:45,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:45,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:45,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:45,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:45,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:45,821 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:45,822 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:45,822 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:45,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:45,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:45,824 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:45,825 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:45,826 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:45,832 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:45,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:45,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:45,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:45,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 10] total 20 [2021-03-10 23:27:45,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881451797] [2021-03-10 23:27:45,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:27:45,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:45,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:27:45,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:27:45,855 INFO L87 Difference]: Start difference. First operand 962 states and 2405 transitions. Second operand has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:46,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:46,755 INFO L93 Difference]: Finished difference Result 1380 states and 3307 transitions. [2021-03-10 23:27:46,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-03-10 23:27:46,756 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 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 26 [2021-03-10 23:27:46,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:46,759 INFO L225 Difference]: With dead ends: 1380 [2021-03-10 23:27:46,759 INFO L226 Difference]: Without dead ends: 1325 [2021-03-10 23:27:46,759 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 988.2ms TimeCoverageRelationStatistics Valid=253, Invalid=1387, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:27:46,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1325 states. [2021-03-10 23:27:46,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1325 to 1005. [2021-03-10 23:27:46,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1005 states, 1004 states have (on average 2.483067729083665) internal successors, (2493), 1004 states have internal predecessors, (2493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:46,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1005 states to 1005 states and 2493 transitions. [2021-03-10 23:27:46,770 INFO L78 Accepts]: Start accepts. Automaton has 1005 states and 2493 transitions. Word has length 26 [2021-03-10 23:27:46,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:46,770 INFO L480 AbstractCegarLoop]: Abstraction has 1005 states and 2493 transitions. [2021-03-10 23:27:46,771 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:46,771 INFO L276 IsEmpty]: Start isEmpty. Operand 1005 states and 2493 transitions. [2021-03-10 23:27:46,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:46,772 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:46,772 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:46,993 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:46,993 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:46,993 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1163999753, now seen corresponding path program 35 times [2021-03-10 23:27:46,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:46,994 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297202698] [2021-03-10 23:27:46,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:47,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:47,219 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:47,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297202698] [2021-03-10 23:27:47,220 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344085472] [2021-03-10 23:27:47,220 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:47,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:27:47,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:47,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:47,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:47,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:47,442 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:47,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:47,443 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:47,444 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:47,444 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:47,445 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:47,445 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:47,446 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:47,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:47,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:47,452 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:47,469 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:47,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:47,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 23:27:47,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025058769] [2021-03-10 23:27:47,469 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:27:47,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:47,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:27:47,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:27:47,470 INFO L87 Difference]: Start difference. First operand 1005 states and 2493 transitions. Second operand has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:48,295 INFO L93 Difference]: Finished difference Result 1303 states and 3059 transitions. [2021-03-10 23:27:48,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:27:48,296 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 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 26 [2021-03-10 23:27:48,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:48,297 INFO L225 Difference]: With dead ends: 1303 [2021-03-10 23:27:48,297 INFO L226 Difference]: Without dead ends: 1269 [2021-03-10 23:27:48,298 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 774.3ms TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2021-03-10 23:27:48,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1269 states. [2021-03-10 23:27:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1269 to 1053. [2021-03-10 23:27:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.4980988593155895) internal successors, (2628), 1052 states have internal predecessors, (2628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2628 transitions. [2021-03-10 23:27:48,313 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2628 transitions. Word has length 26 [2021-03-10 23:27:48,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:48,313 INFO L480 AbstractCegarLoop]: Abstraction has 1053 states and 2628 transitions. [2021-03-10 23:27:48,313 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.2) internal successors, (44), 19 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:48,313 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2628 transitions. [2021-03-10 23:27:48,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:48,315 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:48,315 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:48,524 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-03-10 23:27:48,524 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:48,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:48,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1726651059, now seen corresponding path program 36 times [2021-03-10 23:27:48,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:48,525 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [387270574] [2021-03-10 23:27:48,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:48,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:48,761 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:48,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [387270574] [2021-03-10 23:27:48,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132493376] [2021-03-10 23:27:48,761 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:27:48,791 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-03-10 23:27:48,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:48,792 WARN L261 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 31 conjunts are in the unsatisfiable core [2021-03-10 23:27:48,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:49,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:49,155 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:49,156 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:49,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:49,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:49,184 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 4 new quantified variables, introduced 9 case distinctions, treesize of input 49 treesize of output 55 [2021-03-10 23:27:49,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:27:49,252 INFO L628 ElimStorePlain]: treesize reduction 52, result has 42.2 percent of original size [2021-03-10 23:27:49,270 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:49,270 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:74, output treesize:50 [2021-03-10 23:27:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:49,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:49,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 15] total 24 [2021-03-10 23:27:49,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325336347] [2021-03-10 23:27:49,383 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:27:49,383 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:49,383 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:27:49,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:27:49,383 INFO L87 Difference]: Start difference. First operand 1053 states and 2628 transitions. Second operand has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:51,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:51,390 INFO L93 Difference]: Finished difference Result 1517 states and 3621 transitions. [2021-03-10 23:27:51,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:27:51,390 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 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 26 [2021-03-10 23:27:51,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:51,392 INFO L225 Difference]: With dead ends: 1517 [2021-03-10 23:27:51,392 INFO L226 Difference]: Without dead ends: 1455 [2021-03-10 23:27:51,393 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 12 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 915 ImplicationChecksByTransitivity, 2093.7ms TimeCoverageRelationStatistics Valid=505, Invalid=2687, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:27:51,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1455 states. [2021-03-10 23:27:51,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1455 to 1096. [2021-03-10 23:27:51,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1095 states have (on average 2.4968036529680364) internal successors, (2734), 1095 states have internal predecessors, (2734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:51,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 2734 transitions. [2021-03-10 23:27:51,409 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 2734 transitions. Word has length 26 [2021-03-10 23:27:51,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:51,409 INFO L480 AbstractCegarLoop]: Abstraction has 1096 states and 2734 transitions. [2021-03-10 23:27:51,409 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 1.8) internal successors, (45), 24 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:51,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 2734 transitions. [2021-03-10 23:27:51,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:51,411 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:51,411 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:51,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-03-10 23:27:51,615 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:51,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:51,615 INFO L82 PathProgramCache]: Analyzing trace with hash 609282159, now seen corresponding path program 37 times [2021-03-10 23:27:51,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:51,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72683555] [2021-03-10 23:27:51,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:51,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:51,870 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:51,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72683555] [2021-03-10 23:27:51,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [929191078] [2021-03-10 23:27:51,870 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:51,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:51,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:51,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:52,068 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:52,069 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:52,070 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:52,071 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:52,071 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:52,072 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:52,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:52,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:52,080 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:52,089 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:52,090 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:52,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:52,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 23:27:52,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334301629] [2021-03-10 23:27:52,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:27:52,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:27:52,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:27:52,117 INFO L87 Difference]: Start difference. First operand 1096 states and 2734 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:53,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:53,273 INFO L93 Difference]: Finished difference Result 1328 states and 3219 transitions. [2021-03-10 23:27:53,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:27:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 26 [2021-03-10 23:27:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:53,275 INFO L225 Difference]: With dead ends: 1328 [2021-03-10 23:27:53,275 INFO L226 Difference]: Without dead ends: 1286 [2021-03-10 23:27:53,276 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 393 ImplicationChecksByTransitivity, 1142.4ms TimeCoverageRelationStatistics Valid=270, Invalid=1452, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:27:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1286 states. [2021-03-10 23:27:53,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1286 to 1122. [2021-03-10 23:27:53,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1122 states, 1121 states have (on average 2.487065120428189) internal successors, (2788), 1121 states have internal predecessors, (2788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:53,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1122 states to 1122 states and 2788 transitions. [2021-03-10 23:27:53,289 INFO L78 Accepts]: Start accepts. Automaton has 1122 states and 2788 transitions. Word has length 26 [2021-03-10 23:27:53,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:53,289 INFO L480 AbstractCegarLoop]: Abstraction has 1122 states and 2788 transitions. [2021-03-10 23:27:53,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:53,289 INFO L276 IsEmpty]: Start isEmpty. Operand 1122 states and 2788 transitions. [2021-03-10 23:27:53,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-03-10 23:27:53,291 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:53,291 INFO L519 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:53,499 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:53,500 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:53,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:53,500 INFO L82 PathProgramCache]: Analyzing trace with hash 1520712627, now seen corresponding path program 38 times [2021-03-10 23:27:53,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:53,500 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265207176] [2021-03-10 23:27:53,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:53,739 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:53,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265207176] [2021-03-10 23:27:53,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392992739] [2021-03-10 23:27:53,739 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:53,756 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:27:53,756 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:53,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 27 conjunts are in the unsatisfiable core [2021-03-10 23:27:53,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:53,953 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:53,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:53,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:53,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:53,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:53,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:27:53,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:53,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:27:53,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 53 treesize of output 7 [2021-03-10 23:27:53,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:27:53,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:27:53,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:27:53,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:59, output treesize:7 [2021-03-10 23:27:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:53,996 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:53,996 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10] total 19 [2021-03-10 23:27:53,996 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487633204] [2021-03-10 23:27:53,996 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:27:53,996 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:53,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:27:53,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:27:53,997 INFO L87 Difference]: Start difference. First operand 1122 states and 2788 transitions. Second operand has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:55,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:55,159 INFO L93 Difference]: Finished difference Result 1262 states and 3066 transitions. [2021-03-10 23:27:55,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:27:55,159 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 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 26 [2021-03-10 23:27:55,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:55,162 INFO L225 Difference]: With dead ends: 1262 [2021-03-10 23:27:55,162 INFO L226 Difference]: Without dead ends: 1255 [2021-03-10 23:27:55,162 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1174.2ms TimeCoverageRelationStatistics Valid=277, Invalid=1529, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:27:55,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1255 states. [2021-03-10 23:27:55,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1255 to 1131. [2021-03-10 23:27:55,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1131 states, 1130 states have (on average 2.4867256637168142) internal successors, (2810), 1130 states have internal predecessors, (2810), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:55,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1131 states to 1131 states and 2810 transitions. [2021-03-10 23:27:55,179 INFO L78 Accepts]: Start accepts. Automaton has 1131 states and 2810 transitions. Word has length 26 [2021-03-10 23:27:55,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:55,180 INFO L480 AbstractCegarLoop]: Abstraction has 1131 states and 2810 transitions. [2021-03-10 23:27:55,180 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.15) internal successors, (43), 19 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:55,181 INFO L276 IsEmpty]: Start isEmpty. Operand 1131 states and 2810 transitions. [2021-03-10 23:27:55,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:27:55,183 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:55,183 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:55,403 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:55,404 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:55,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:55,404 INFO L82 PathProgramCache]: Analyzing trace with hash -197112851, now seen corresponding path program 39 times [2021-03-10 23:27:55,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:55,404 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478102034] [2021-03-10 23:27:55,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:55,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:55,515 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:55,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478102034] [2021-03-10 23:27:55,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1096921299] [2021-03-10 23:27:55,516 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:55,533 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:27:55,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:55,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:27:55,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:55,690 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:55,691 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:55,691 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 21 [2021-03-10 23:27:55,691 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518799446] [2021-03-10 23:27:55,691 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:27:55,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:55,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:27:55,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:27:55,691 INFO L87 Difference]: Start difference. First operand 1131 states and 2810 transitions. Second operand has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:56,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:56,438 INFO L93 Difference]: Finished difference Result 1659 states and 3859 transitions. [2021-03-10 23:27:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:27:56,438 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 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 28 [2021-03-10 23:27:56,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:56,441 INFO L225 Difference]: With dead ends: 1659 [2021-03-10 23:27:56,441 INFO L226 Difference]: Without dead ends: 1659 [2021-03-10 23:27:56,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 701.7ms TimeCoverageRelationStatistics Valid=772, Invalid=2090, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:27:56,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1659 states. [2021-03-10 23:27:56,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1659 to 1088. [2021-03-10 23:27:56,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1087 states have (on average 2.4885004599816005) internal successors, (2705), 1087 states have internal predecessors, (2705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:56,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 2705 transitions. [2021-03-10 23:27:56,454 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 2705 transitions. Word has length 28 [2021-03-10 23:27:56,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:56,454 INFO L480 AbstractCegarLoop]: Abstraction has 1088 states and 2705 transitions. [2021-03-10 23:27:56,454 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.227272727272727) internal successors, (49), 21 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:56,454 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 2705 transitions. [2021-03-10 23:27:56,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:27:56,456 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:56,456 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:56,676 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:56,677 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:56,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:56,677 INFO L82 PathProgramCache]: Analyzing trace with hash -1535197913, now seen corresponding path program 40 times [2021-03-10 23:27:56,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:56,677 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811479621] [2021-03-10 23:27:56,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:56,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:56,757 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811479621] [2021-03-10 23:27:56,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504257706] [2021-03-10 23:27:56,758 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 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:56,779 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:27:56,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:56,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:27:56,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:56,963 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:56,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:56,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:27:56,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293227137] [2021-03-10 23:27:56,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:27:56,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:56,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:27:56,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:27:56,964 INFO L87 Difference]: Start difference. First operand 1088 states and 2705 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:57,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:57,940 INFO L93 Difference]: Finished difference Result 2098 states and 4811 transitions. [2021-03-10 23:27:57,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:27:57,941 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 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 28 [2021-03-10 23:27:57,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:57,943 INFO L225 Difference]: With dead ends: 2098 [2021-03-10 23:27:57,943 INFO L226 Difference]: Without dead ends: 2027 [2021-03-10 23:27:57,944 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1104 ImplicationChecksByTransitivity, 932.5ms TimeCoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:27:57,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2027 states. [2021-03-10 23:27:57,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2027 to 1266. [2021-03-10 23:27:57,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1266 states, 1265 states have (on average 2.5043478260869567) internal successors, (3168), 1265 states have internal predecessors, (3168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:57,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1266 states to 1266 states and 3168 transitions. [2021-03-10 23:27:57,967 INFO L78 Accepts]: Start accepts. Automaton has 1266 states and 3168 transitions. Word has length 28 [2021-03-10 23:27:57,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:57,968 INFO L480 AbstractCegarLoop]: Abstraction has 1266 states and 3168 transitions. [2021-03-10 23:27:57,968 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:57,968 INFO L276 IsEmpty]: Start isEmpty. Operand 1266 states and 3168 transitions. [2021-03-10 23:27:57,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:27:57,970 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:57,970 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:58,183 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-03-10 23:27:58,183 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:58,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:58,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1640834073, now seen corresponding path program 41 times [2021-03-10 23:27:58,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:58,184 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132600994] [2021-03-10 23:27:58,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:58,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:58,233 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:58,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132600994] [2021-03-10 23:27:58,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88229578] [2021-03-10 23:27:58,234 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:58,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:27:58,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:58,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:27:58,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:58,398 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 16 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:58,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:58,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 23:27:58,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835412710] [2021-03-10 23:27:58,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:27:58,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:58,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:27:58,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:58,399 INFO L87 Difference]: Start difference. First operand 1266 states and 3168 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:59,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:27:59,201 INFO L93 Difference]: Finished difference Result 2349 states and 5625 transitions. [2021-03-10 23:27:59,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:27:59,202 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 28 [2021-03-10 23:27:59,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:27:59,206 INFO L225 Difference]: With dead ends: 2349 [2021-03-10 23:27:59,206 INFO L226 Difference]: Without dead ends: 2343 [2021-03-10 23:27:59,206 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 720.4ms TimeCoverageRelationStatistics Valid=836, Invalid=2134, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:27:59,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2343 states. [2021-03-10 23:27:59,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2343 to 1568. [2021-03-10 23:27:59,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1568 states, 1567 states have (on average 2.5252074026802807) internal successors, (3957), 1567 states have internal predecessors, (3957), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:59,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1568 states to 1568 states and 3957 transitions. [2021-03-10 23:27:59,234 INFO L78 Accepts]: Start accepts. Automaton has 1568 states and 3957 transitions. Word has length 28 [2021-03-10 23:27:59,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:27:59,234 INFO L480 AbstractCegarLoop]: Abstraction has 1568 states and 3957 transitions. [2021-03-10 23:27:59,234 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:27:59,234 INFO L276 IsEmpty]: Start isEmpty. Operand 1568 states and 3957 transitions. [2021-03-10 23:27:59,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:27:59,236 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:27:59,236 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:27:59,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:59,451 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:27:59,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:27:59,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1972512861, now seen corresponding path program 42 times [2021-03-10 23:27:59,451 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:27:59,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859796959] [2021-03-10 23:27:59,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:27:59,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:27:59,503 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:59,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859796959] [2021-03-10 23:27:59,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973816692] [2021-03-10 23:27:59,503 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:27:59,521 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:27:59,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:27:59,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:27:59,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:27:59,667 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:27:59,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:27:59,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 23:27:59,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105441910] [2021-03-10 23:27:59,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:27:59,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:27:59,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:27:59,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:27:59,668 INFO L87 Difference]: Start difference. First operand 1568 states and 3957 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:00,372 INFO L93 Difference]: Finished difference Result 1855 states and 4495 transitions. [2021-03-10 23:28:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:28:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 28 [2021-03-10 23:28:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:00,376 INFO L225 Difference]: With dead ends: 1855 [2021-03-10 23:28:00,376 INFO L226 Difference]: Without dead ends: 1851 [2021-03-10 23:28:00,377 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 669 ImplicationChecksByTransitivity, 631.0ms TimeCoverageRelationStatistics Valid=647, Invalid=1903, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:28:00,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1851 states. [2021-03-10 23:28:00,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1851 to 1540. [2021-03-10 23:28:00,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1540 states, 1539 states have (on average 2.5269655620532814) internal successors, (3889), 1539 states have internal predecessors, (3889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:00,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1540 states to 1540 states and 3889 transitions. [2021-03-10 23:28:00,398 INFO L78 Accepts]: Start accepts. Automaton has 1540 states and 3889 transitions. Word has length 28 [2021-03-10 23:28:00,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:00,398 INFO L480 AbstractCegarLoop]: Abstraction has 1540 states and 3889 transitions. [2021-03-10 23:28:00,398 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:00,399 INFO L276 IsEmpty]: Start isEmpty. Operand 1540 states and 3889 transitions. [2021-03-10 23:28:00,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:00,400 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:00,401 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:00,615 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:00,615 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:00,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:00,615 INFO L82 PathProgramCache]: Analyzing trace with hash -1204854355, now seen corresponding path program 43 times [2021-03-10 23:28:00,615 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:00,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706790429] [2021-03-10 23:28:00,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:00,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 17 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:00,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706790429] [2021-03-10 23:28:00,665 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067440395] [2021-03-10 23:28:00,665 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:00,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:00,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:00,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:00,832 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:00,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:00,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 23:28:00,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [730488935] [2021-03-10 23:28:00,832 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:28:00,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:00,832 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:28:00,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:28:00,833 INFO L87 Difference]: Start difference. First operand 1540 states and 3889 transitions. Second operand has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:01,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:01,378 INFO L93 Difference]: Finished difference Result 2146 states and 5210 transitions. [2021-03-10 23:28:01,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-03-10 23:28:01,378 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 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 28 [2021-03-10 23:28:01,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:01,382 INFO L225 Difference]: With dead ends: 2146 [2021-03-10 23:28:01,382 INFO L226 Difference]: Without dead ends: 2137 [2021-03-10 23:28:01,382 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 481.5ms TimeCoverageRelationStatistics Valid=421, Invalid=1301, Unknown=0, NotChecked=0, Total=1722 [2021-03-10 23:28:01,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2137 states. [2021-03-10 23:28:01,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2137 to 1645. [2021-03-10 23:28:01,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1645 states, 1644 states have (on average 2.5413625304136254) internal successors, (4178), 1644 states have internal predecessors, (4178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:01,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1645 states to 1645 states and 4178 transitions. [2021-03-10 23:28:01,421 INFO L78 Accepts]: Start accepts. Automaton has 1645 states and 4178 transitions. Word has length 28 [2021-03-10 23:28:01,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:01,421 INFO L480 AbstractCegarLoop]: Abstraction has 1645 states and 4178 transitions. [2021-03-10 23:28:01,421 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.611111111111111) internal successors, (47), 17 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:01,421 INFO L276 IsEmpty]: Start isEmpty. Operand 1645 states and 4178 transitions. [2021-03-10 23:28:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:01,423 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:01,423 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:01,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-03-10 23:28:01,644 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:01,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:01,644 INFO L82 PathProgramCache]: Analyzing trace with hash -760321333, now seen corresponding path program 44 times [2021-03-10 23:28:01,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:01,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2095153447] [2021-03-10 23:28:01,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:01,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:01,712 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:01,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2095153447] [2021-03-10 23:28:01,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905986068] [2021-03-10 23:28:01,712 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:01,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:28:01,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:01,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:01,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:01,924 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:01,925 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:01,925 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-03-10 23:28:01,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058375073] [2021-03-10 23:28:01,925 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:28:01,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:01,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:28:01,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:28:01,926 INFO L87 Difference]: Start difference. First operand 1645 states and 4178 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:02,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:02,631 INFO L93 Difference]: Finished difference Result 2239 states and 5399 transitions. [2021-03-10 23:28:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:28:02,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 28 [2021-03-10 23:28:02,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:02,635 INFO L225 Difference]: With dead ends: 2239 [2021-03-10 23:28:02,635 INFO L226 Difference]: Without dead ends: 2229 [2021-03-10 23:28:02,635 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 775 ImplicationChecksByTransitivity, 666.7ms TimeCoverageRelationStatistics Valid=680, Invalid=2076, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:28:02,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2229 states. [2021-03-10 23:28:02,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2229 to 1698. [2021-03-10 23:28:02,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1698 states, 1697 states have (on average 2.5521508544490277) internal successors, (4331), 1697 states have internal predecessors, (4331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:02,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1698 states to 1698 states and 4331 transitions. [2021-03-10 23:28:02,661 INFO L78 Accepts]: Start accepts. Automaton has 1698 states and 4331 transitions. Word has length 28 [2021-03-10 23:28:02,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:02,661 INFO L480 AbstractCegarLoop]: Abstraction has 1698 states and 4331 transitions. [2021-03-10 23:28:02,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 1698 states and 4331 transitions. [2021-03-10 23:28:02,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:02,663 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:02,663 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:02,879 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:02,879 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:02,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:02,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1047790539, now seen corresponding path program 45 times [2021-03-10 23:28:02,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:02,880 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394055073] [2021-03-10 23:28:02,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:02,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:02,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394055073] [2021-03-10 23:28:02,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [713503160] [2021-03-10 23:28:02,945 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:28:02,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:28:02,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:02,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:02,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:03,151 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:03,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:03,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 23:28:03,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936733628] [2021-03-10 23:28:03,151 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:28:03,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:03,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:28:03,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:28:03,152 INFO L87 Difference]: Start difference. First operand 1698 states and 4331 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:03,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:03,886 INFO L93 Difference]: Finished difference Result 2460 states and 5924 transitions. [2021-03-10 23:28:03,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:28:03,887 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 28 [2021-03-10 23:28:03,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:03,889 INFO L225 Difference]: With dead ends: 2460 [2021-03-10 23:28:03,889 INFO L226 Difference]: Without dead ends: 2438 [2021-03-10 23:28:03,889 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 676.8ms TimeCoverageRelationStatistics Valid=724, Invalid=2246, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:28:03,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2438 states. [2021-03-10 23:28:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2438 to 1613. [2021-03-10 23:28:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1613 states, 1612 states have (on average 2.5372208436724564) internal successors, (4090), 1612 states have internal predecessors, (4090), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:03,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1613 states to 1613 states and 4090 transitions. [2021-03-10 23:28:03,916 INFO L78 Accepts]: Start accepts. Automaton has 1613 states and 4090 transitions. Word has length 28 [2021-03-10 23:28:03,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:03,916 INFO L480 AbstractCegarLoop]: Abstraction has 1613 states and 4090 transitions. [2021-03-10 23:28:03,917 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:03,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1613 states and 4090 transitions. [2021-03-10 23:28:03,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:03,919 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:03,919 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:04,134 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-03-10 23:28:04,135 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:04,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:04,135 INFO L82 PathProgramCache]: Analyzing trace with hash 131310389, now seen corresponding path program 46 times [2021-03-10 23:28:04,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:04,135 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892347599] [2021-03-10 23:28:04,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:04,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:04,216 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 8 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:04,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892347599] [2021-03-10 23:28:04,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763990513] [2021-03-10 23:28:04,216 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:28:04,241 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:28:04,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:04,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:04,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:04,427 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:04,427 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:28:04,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440042810] [2021-03-10 23:28:04,428 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:28:04,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:04,428 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:28:04,428 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:28:04,428 INFO L87 Difference]: Start difference. First operand 1613 states and 4090 transitions. Second operand has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:05,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:05,230 INFO L93 Difference]: Finished difference Result 2433 states and 5712 transitions. [2021-03-10 23:28:05,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-03-10 23:28:05,231 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:28:05,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:05,233 INFO L225 Difference]: With dead ends: 2433 [2021-03-10 23:28:05,233 INFO L226 Difference]: Without dead ends: 2433 [2021-03-10 23:28:05,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 745.0ms TimeCoverageRelationStatistics Valid=773, Invalid=2089, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:28:05,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2433 states. [2021-03-10 23:28:05,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2433 to 1379. [2021-03-10 23:28:05,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1379 states, 1378 states have (on average 2.4985486211901304) internal successors, (3443), 1378 states have internal predecessors, (3443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:05,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1379 states to 1379 states and 3443 transitions. [2021-03-10 23:28:05,249 INFO L78 Accepts]: Start accepts. Automaton has 1379 states and 3443 transitions. Word has length 28 [2021-03-10 23:28:05,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:05,249 INFO L480 AbstractCegarLoop]: Abstraction has 1379 states and 3443 transitions. [2021-03-10 23:28:05,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:05,249 INFO L276 IsEmpty]: Start isEmpty. Operand 1379 states and 3443 transitions. [2021-03-10 23:28:05,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:05,251 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:05,251 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:05,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:05,451 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:05,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:05,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1416205117, now seen corresponding path program 47 times [2021-03-10 23:28:05,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:05,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037190600] [2021-03-10 23:28:05,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:05,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037190600] [2021-03-10 23:28:05,514 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656633734] [2021-03-10 23:28:05,514 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:05,531 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-03-10 23:28:05,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:05,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:05,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:05,717 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:05,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:05,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 23:28:05,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615211616] [2021-03-10 23:28:05,717 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:28:05,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:05,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:28:05,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:28:05,718 INFO L87 Difference]: Start difference. First operand 1379 states and 3443 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:06,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:06,412 INFO L93 Difference]: Finished difference Result 1797 states and 4200 transitions. [2021-03-10 23:28:06,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:28:06,413 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 28 [2021-03-10 23:28:06,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:06,414 INFO L225 Difference]: With dead ends: 1797 [2021-03-10 23:28:06,414 INFO L226 Difference]: Without dead ends: 1758 [2021-03-10 23:28:06,415 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 797 ImplicationChecksByTransitivity, 664.4ms TimeCoverageRelationStatistics Valid=599, Invalid=2053, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:28:06,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1758 states. [2021-03-10 23:28:06,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1758 to 1325. [2021-03-10 23:28:06,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1325 states, 1324 states have (on average 2.4841389728096677) internal successors, (3289), 1324 states have internal predecessors, (3289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:06,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1325 states to 1325 states and 3289 transitions. [2021-03-10 23:28:06,429 INFO L78 Accepts]: Start accepts. Automaton has 1325 states and 3289 transitions. Word has length 28 [2021-03-10 23:28:06,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:06,429 INFO L480 AbstractCegarLoop]: Abstraction has 1325 states and 3289 transitions. [2021-03-10 23:28:06,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:06,429 INFO L276 IsEmpty]: Start isEmpty. Operand 1325 states and 3289 transitions. [2021-03-10 23:28:06,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:06,430 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:06,430 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:06,630 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:06,630 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:06,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:06,631 INFO L82 PathProgramCache]: Analyzing trace with hash -1362767239, now seen corresponding path program 48 times [2021-03-10 23:28:06,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:06,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647079892] [2021-03-10 23:28:06,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:06,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 7 proven. 17 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:06,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647079892] [2021-03-10 23:28:06,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747279431] [2021-03-10 23:28:06,704 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:28:06,732 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:28:06,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:06,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:06,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:06,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:06,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 23:28:06,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516217741] [2021-03-10 23:28:06,903 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:28:06,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:06,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:28:06,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:28:06,903 INFO L87 Difference]: Start difference. First operand 1325 states and 3289 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:07,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:07,729 INFO L93 Difference]: Finished difference Result 2342 states and 5476 transitions. [2021-03-10 23:28:07,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:28:07,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-03-10 23:28:07,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:07,731 INFO L225 Difference]: With dead ends: 2342 [2021-03-10 23:28:07,732 INFO L226 Difference]: Without dead ends: 2342 [2021-03-10 23:28:07,732 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 959 ImplicationChecksByTransitivity, 742.5ms TimeCoverageRelationStatistics Valid=892, Invalid=2300, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:28:07,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2342 states. [2021-03-10 23:28:07,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2342 to 1424. [2021-03-10 23:28:07,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1424 states, 1423 states have (on average 2.460997891777934) internal successors, (3502), 1423 states have internal predecessors, (3502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:07,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1424 states to 1424 states and 3502 transitions. [2021-03-10 23:28:07,748 INFO L78 Accepts]: Start accepts. Automaton has 1424 states and 3502 transitions. Word has length 28 [2021-03-10 23:28:07,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:07,748 INFO L480 AbstractCegarLoop]: Abstraction has 1424 states and 3502 transitions. [2021-03-10 23:28:07,748 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:07,748 INFO L276 IsEmpty]: Start isEmpty. Operand 1424 states and 3502 transitions. [2021-03-10 23:28:07,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:07,750 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:07,750 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:07,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-03-10 23:28:07,950 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:07,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:07,951 INFO L82 PathProgramCache]: Analyzing trace with hash -452605191, now seen corresponding path program 49 times [2021-03-10 23:28:07,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:07,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1533516971] [2021-03-10 23:28:07,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:07,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:08,011 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:08,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1533516971] [2021-03-10 23:28:08,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219705355] [2021-03-10 23:28:08,012 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:08,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:08,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:08,207 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:08,207 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:08,207 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-03-10 23:28:08,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659200618] [2021-03-10 23:28:08,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:28:08,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:08,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:28:08,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:28:08,208 INFO L87 Difference]: Start difference. First operand 1424 states and 3502 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:08,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:08,819 INFO L93 Difference]: Finished difference Result 1768 states and 4145 transitions. [2021-03-10 23:28:08,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:28:08,819 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 28 [2021-03-10 23:28:08,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:08,821 INFO L225 Difference]: With dead ends: 1768 [2021-03-10 23:28:08,821 INFO L226 Difference]: Without dead ends: 1750 [2021-03-10 23:28:08,821 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 585.6ms TimeCoverageRelationStatistics Valid=519, Invalid=1737, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:28:08,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1750 states. [2021-03-10 23:28:08,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1750 to 1453. [2021-03-10 23:28:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 2.465564738292011) internal successors, (3580), 1452 states have internal predecessors, (3580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 3580 transitions. [2021-03-10 23:28:08,835 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 3580 transitions. Word has length 28 [2021-03-10 23:28:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:08,835 INFO L480 AbstractCegarLoop]: Abstraction has 1453 states and 3580 transitions. [2021-03-10 23:28:08,835 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 3580 transitions. [2021-03-10 23:28:08,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:08,837 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:08,837 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:09,037 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:09,037 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:09,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:09,038 INFO L82 PathProgramCache]: Analyzing trace with hash 983607605, now seen corresponding path program 50 times [2021-03-10 23:28:09,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:09,038 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741705654] [2021-03-10 23:28:09,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:09,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:09,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 18 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:09,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741705654] [2021-03-10 23:28:09,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536886481] [2021-03-10 23:28:09,104 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:28:09,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:28:09,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:09,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:09,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:09,343 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 6 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:09,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:09,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-03-10 23:28:09,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231723640] [2021-03-10 23:28:09,344 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:28:09,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:09,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:28:09,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:28:09,345 INFO L87 Difference]: Start difference. First operand 1453 states and 3580 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:10,270 INFO L93 Difference]: Finished difference Result 2840 states and 6892 transitions. [2021-03-10 23:28:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:28:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 28 [2021-03-10 23:28:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:10,272 INFO L225 Difference]: With dead ends: 2840 [2021-03-10 23:28:10,272 INFO L226 Difference]: Without dead ends: 2840 [2021-03-10 23:28:10,273 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1214 ImplicationChecksByTransitivity, 881.1ms TimeCoverageRelationStatistics Valid=1080, Invalid=2580, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:28:10,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2840 states. [2021-03-10 23:28:10,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2840 to 2234. [2021-03-10 23:28:10,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2234 states, 2233 states have (on average 2.5476936856247203) internal successors, (5689), 2233 states have internal predecessors, (5689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:10,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2234 states to 2234 states and 5689 transitions. [2021-03-10 23:28:10,296 INFO L78 Accepts]: Start accepts. Automaton has 2234 states and 5689 transitions. Word has length 28 [2021-03-10 23:28:10,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:10,296 INFO L480 AbstractCegarLoop]: Abstraction has 2234 states and 5689 transitions. [2021-03-10 23:28:10,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:10,296 INFO L276 IsEmpty]: Start isEmpty. Operand 2234 states and 5689 transitions. [2021-03-10 23:28:10,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:10,298 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:10,298 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:10,498 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-03-10 23:28:10,498 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:10,499 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:10,499 INFO L82 PathProgramCache]: Analyzing trace with hash -768473619, now seen corresponding path program 51 times [2021-03-10 23:28:10,499 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:10,499 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1046142084] [2021-03-10 23:28:10,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:10,554 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1046142084] [2021-03-10 23:28:10,554 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56539795] [2021-03-10 23:28:10,555 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:28:10,591 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:28:10,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:10,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:10,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:10,745 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 11 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:10,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:10,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11] total 17 [2021-03-10 23:28:10,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798784597] [2021-03-10 23:28:10,745 INFO L460 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-03-10 23:28:10,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:10,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-03-10 23:28:10,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2021-03-10 23:28:10,746 INFO L87 Difference]: Start difference. First operand 2234 states and 5689 transitions. Second operand has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:11,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:11,367 INFO L93 Difference]: Finished difference Result 2763 states and 6717 transitions. [2021-03-10 23:28:11,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:28:11,367 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 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 28 [2021-03-10 23:28:11,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:11,369 INFO L225 Difference]: With dead ends: 2763 [2021-03-10 23:28:11,369 INFO L226 Difference]: Without dead ends: 2759 [2021-03-10 23:28:11,370 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 636 ImplicationChecksByTransitivity, 570.9ms TimeCoverageRelationStatistics Valid=634, Invalid=1622, Unknown=0, NotChecked=0, Total=2256 [2021-03-10 23:28:11,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2759 states. [2021-03-10 23:28:11,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2759 to 2208. [2021-03-10 23:28:11,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2208 states, 2207 states have (on average 2.545083824195741) internal successors, (5617), 2207 states have internal predecessors, (5617), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2208 states to 2208 states and 5617 transitions. [2021-03-10 23:28:11,393 INFO L78 Accepts]: Start accepts. Automaton has 2208 states and 5617 transitions. Word has length 28 [2021-03-10 23:28:11,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:11,393 INFO L480 AbstractCegarLoop]: Abstraction has 2208 states and 5617 transitions. [2021-03-10 23:28:11,393 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.5555555555555554) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:11,393 INFO L276 IsEmpty]: Start isEmpty. Operand 2208 states and 5617 transitions. [2021-03-10 23:28:11,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:11,395 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:11,395 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:11,595 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-03-10 23:28:11,596 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:11,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:11,596 INFO L82 PathProgramCache]: Analyzing trace with hash -1274819885, now seen corresponding path program 52 times [2021-03-10 23:28:11,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:11,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378530986] [2021-03-10 23:28:11,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:11,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:11,656 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 10 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:11,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378530986] [2021-03-10 23:28:11,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708744191] [2021-03-10 23:28:11,657 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:11,674 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:28:11,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:11,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:11,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:11,836 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:11,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:11,837 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 18 [2021-03-10 23:28:11,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048656762] [2021-03-10 23:28:11,837 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-03-10 23:28:11,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:11,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-03-10 23:28:11,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-03-10 23:28:11,837 INFO L87 Difference]: Start difference. First operand 2208 states and 5617 transitions. Second operand has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:12,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:12,455 INFO L93 Difference]: Finished difference Result 2963 states and 7207 transitions. [2021-03-10 23:28:12,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:28:12,456 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 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 28 [2021-03-10 23:28:12,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:12,458 INFO L225 Difference]: With dead ends: 2963 [2021-03-10 23:28:12,458 INFO L226 Difference]: Without dead ends: 2951 [2021-03-10 23:28:12,458 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=613, Invalid=1739, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:28:12,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2951 states. [2021-03-10 23:28:12,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2951 to 2376. [2021-03-10 23:28:12,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2376 states, 2375 states have (on average 2.56) internal successors, (6080), 2375 states have internal predecessors, (6080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:12,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2376 states to 2376 states and 6080 transitions. [2021-03-10 23:28:12,487 INFO L78 Accepts]: Start accepts. Automaton has 2376 states and 6080 transitions. Word has length 28 [2021-03-10 23:28:12,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:12,488 INFO L480 AbstractCegarLoop]: Abstraction has 2376 states and 6080 transitions. [2021-03-10 23:28:12,488 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.4210526315789473) internal successors, (46), 18 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:12,488 INFO L276 IsEmpty]: Start isEmpty. Operand 2376 states and 6080 transitions. [2021-03-10 23:28:12,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:12,490 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:12,491 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:12,707 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-03-10 23:28:12,707 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:12,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:12,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1502041265, now seen corresponding path program 53 times [2021-03-10 23:28:12,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:12,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356793235] [2021-03-10 23:28:12,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:12,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:12,778 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 15 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:12,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356793235] [2021-03-10 23:28:12,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574114366] [2021-03-10 23:28:12,778 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:12,801 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:28:12,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:12,801 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:12,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:13,009 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 9 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:13,009 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:13,009 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-03-10 23:28:13,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697491488] [2021-03-10 23:28:13,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-03-10 23:28:13,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:13,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-03-10 23:28:13,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-03-10 23:28:13,010 INFO L87 Difference]: Start difference. First operand 2376 states and 6080 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:13,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:13,768 INFO L93 Difference]: Finished difference Result 3272 states and 7971 transitions. [2021-03-10 23:28:13,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:28:13,769 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 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 28 [2021-03-10 23:28:13,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:13,772 INFO L225 Difference]: With dead ends: 3272 [2021-03-10 23:28:13,772 INFO L226 Difference]: Without dead ends: 3252 [2021-03-10 23:28:13,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 765 ImplicationChecksByTransitivity, 731.1ms TimeCoverageRelationStatistics Valid=662, Invalid=1990, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:28:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-03-10 23:28:13,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2615. [2021-03-10 23:28:13,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2614 states have (on average 2.5734506503443) internal successors, (6727), 2614 states have internal predecessors, (6727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:13,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 6727 transitions. [2021-03-10 23:28:13,804 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 6727 transitions. Word has length 28 [2021-03-10 23:28:13,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:13,804 INFO L480 AbstractCegarLoop]: Abstraction has 2615 states and 6727 transitions. [2021-03-10 23:28:13,804 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:13,804 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 6727 transitions. [2021-03-10 23:28:13,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-03-10 23:28:13,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:13,806 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:14,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-03-10 23:28:14,007 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:14,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:14,007 INFO L82 PathProgramCache]: Analyzing trace with hash -818455349, now seen corresponding path program 54 times [2021-03-10 23:28:14,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:14,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49378564] [2021-03-10 23:28:14,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:14,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49378564] [2021-03-10 23:28:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708479699] [2021-03-10 23:28:14,106 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:28:14,135 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:28:14,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:14,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 11 conjunts are in the unsatisfiable core [2021-03-10 23:28:14,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:14,336 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 13 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:14,336 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:14,336 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-03-10 23:28:14,336 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166109055] [2021-03-10 23:28:14,336 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:28:14,336 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:14,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:28:14,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:28:14,337 INFO L87 Difference]: Start difference. First operand 2615 states and 6727 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:15,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:15,082 INFO L93 Difference]: Finished difference Result 3381 states and 8327 transitions. [2021-03-10 23:28:15,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:28:15,083 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 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 28 [2021-03-10 23:28:15,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:15,087 INFO L225 Difference]: With dead ends: 3381 [2021-03-10 23:28:15,087 INFO L226 Difference]: Without dead ends: 3353 [2021-03-10 23:28:15,088 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 956 ImplicationChecksByTransitivity, 734.5ms TimeCoverageRelationStatistics Valid=778, Invalid=2414, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:28:15,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3353 states. [2021-03-10 23:28:15,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3353 to 2789. [2021-03-10 23:28:15,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2789 states, 2788 states have (on average 2.581061692969871) internal successors, (7196), 2788 states have internal predecessors, (7196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2789 states to 2789 states and 7196 transitions. [2021-03-10 23:28:15,123 INFO L78 Accepts]: Start accepts. Automaton has 2789 states and 7196 transitions. Word has length 28 [2021-03-10 23:28:15,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:15,123 INFO L480 AbstractCegarLoop]: Abstraction has 2789 states and 7196 transitions. [2021-03-10 23:28:15,123 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:15,123 INFO L276 IsEmpty]: Start isEmpty. Operand 2789 states and 7196 transitions. [2021-03-10 23:28:15,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:15,126 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:15,126 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:15,337 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:15,337 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:15,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:15,338 INFO L82 PathProgramCache]: Analyzing trace with hash -40043611, now seen corresponding path program 55 times [2021-03-10 23:28:15,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:15,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153082677] [2021-03-10 23:28:15,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:15,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:15,657 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:15,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153082677] [2021-03-10 23:28:15,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26865861] [2021-03-10 23:28:15,657 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:15,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:15,676 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:15,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:15,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:15,998 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:15,999 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:15,999 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:16,000 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:16,001 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:16,002 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:16,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:16,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:16,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:16,005 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:16,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:16,011 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:16,012 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:16,012 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:16,033 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:16,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:16,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:28:16,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756632137] [2021-03-10 23:28:16,033 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:28:16,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:16,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:28:16,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:28:16,034 INFO L87 Difference]: Start difference. First operand 2789 states and 7196 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:17,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:17,893 INFO L93 Difference]: Finished difference Result 3804 states and 9538 transitions. [2021-03-10 23:28:17,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:28:17,893 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:17,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:17,896 INFO L225 Difference]: With dead ends: 3804 [2021-03-10 23:28:17,896 INFO L226 Difference]: Without dead ends: 3797 [2021-03-10 23:28:17,897 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 1805.5ms TimeCoverageRelationStatistics Valid=415, Invalid=2447, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:28:17,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-03-10 23:28:17,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 2848. [2021-03-10 23:28:17,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2848 states, 2847 states have (on average 2.582718651211802) internal successors, (7353), 2847 states have internal predecessors, (7353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:17,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2848 states to 2848 states and 7353 transitions. [2021-03-10 23:28:17,929 INFO L78 Accepts]: Start accepts. Automaton has 2848 states and 7353 transitions. Word has length 30 [2021-03-10 23:28:17,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:17,929 INFO L480 AbstractCegarLoop]: Abstraction has 2848 states and 7353 transitions. [2021-03-10 23:28:17,929 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:17,929 INFO L276 IsEmpty]: Start isEmpty. Operand 2848 states and 7353 transitions. [2021-03-10 23:28:17,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:17,933 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:17,933 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:18,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:18,154 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:18,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:18,155 INFO L82 PathProgramCache]: Analyzing trace with hash -476580429, now seen corresponding path program 56 times [2021-03-10 23:28:18,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:18,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581350280] [2021-03-10 23:28:18,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:18,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:18,475 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:18,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581350280] [2021-03-10 23:28:18,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710065810] [2021-03-10 23:28:18,475 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 [2021-03-10 23:28:18,494 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:28:18,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:18,494 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:18,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:18,801 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,803 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,804 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:18,805 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:18,808 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,809 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,810 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:18,810 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:18,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:18,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:18,812 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:18,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:18,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:18,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:18,838 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:18,838 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:28:18,838 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971542870] [2021-03-10 23:28:18,838 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:28:18,838 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:18,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:28:18,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:28:18,839 INFO L87 Difference]: Start difference. First operand 2848 states and 7353 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:20,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:20,396 INFO L93 Difference]: Finished difference Result 3780 states and 9511 transitions. [2021-03-10 23:28:20,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-03-10 23:28:20,397 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:20,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:20,400 INFO L225 Difference]: With dead ends: 3780 [2021-03-10 23:28:20,400 INFO L226 Difference]: Without dead ends: 3729 [2021-03-10 23:28:20,400 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 522 ImplicationChecksByTransitivity, 1492.5ms TimeCoverageRelationStatistics Valid=341, Invalid=2011, Unknown=0, NotChecked=0, Total=2352 [2021-03-10 23:28:20,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3729 states. [2021-03-10 23:28:20,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3729 to 2901. [2021-03-10 23:28:20,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2901 states, 2900 states have (on average 2.5724137931034483) internal successors, (7460), 2900 states have internal predecessors, (7460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:20,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2901 states to 2901 states and 7460 transitions. [2021-03-10 23:28:20,429 INFO L78 Accepts]: Start accepts. Automaton has 2901 states and 7460 transitions. Word has length 30 [2021-03-10 23:28:20,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:20,429 INFO L480 AbstractCegarLoop]: Abstraction has 2901 states and 7460 transitions. [2021-03-10 23:28:20,429 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:20,429 INFO L276 IsEmpty]: Start isEmpty. Operand 2901 states and 7460 transitions. [2021-03-10 23:28:20,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:20,432 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:20,432 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:20,632 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:20,632 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:20,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:20,632 INFO L82 PathProgramCache]: Analyzing trace with hash 1012771695, now seen corresponding path program 57 times [2021-03-10 23:28:20,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:20,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459621619] [2021-03-10 23:28:20,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:20,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:20,940 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:20,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459621619] [2021-03-10 23:28:20,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355600798] [2021-03-10 23:28:20,941 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 [2021-03-10 23:28:20,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:28:20,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:20,961 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:28:20,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:21,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:21,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:21,596 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:21,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:21,597 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:21,601 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:21,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:21,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-03-10 23:28:22,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-03-10 23:28:22,134 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 81 DAG size of output: 23 [2021-03-10 23:28:22,135 INFO L628 ElimStorePlain]: treesize reduction 469, result has 6.9 percent of original size [2021-03-10 23:28:22,142 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:28:22,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:22 [2021-03-10 23:28:22,226 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:22,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:22,227 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-03-10 23:28:22,227 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987888156] [2021-03-10 23:28:22,227 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:28:22,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:22,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:28:22,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:28:22,227 INFO L87 Difference]: Start difference. First operand 2901 states and 7460 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:24,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:24,401 INFO L93 Difference]: Finished difference Result 3908 states and 9787 transitions. [2021-03-10 23:28:24,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-03-10 23:28:24,402 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:24,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:24,405 INFO L225 Difference]: With dead ends: 3908 [2021-03-10 23:28:24,405 INFO L226 Difference]: Without dead ends: 3862 [2021-03-10 23:28:24,405 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 685 ImplicationChecksByTransitivity, 2011.0ms TimeCoverageRelationStatistics Valid=405, Invalid=2457, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:28:24,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3862 states. [2021-03-10 23:28:24,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3862 to 2945. [2021-03-10 23:28:24,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2945 states, 2944 states have (on average 2.567255434782609) internal successors, (7558), 2944 states have internal predecessors, (7558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:24,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2945 states to 2945 states and 7558 transitions. [2021-03-10 23:28:24,433 INFO L78 Accepts]: Start accepts. Automaton has 2945 states and 7558 transitions. Word has length 30 [2021-03-10 23:28:24,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:24,433 INFO L480 AbstractCegarLoop]: Abstraction has 2945 states and 7558 transitions. [2021-03-10 23:28:24,433 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:24,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2945 states and 7558 transitions. [2021-03-10 23:28:24,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:24,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:24,436 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:24,636 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-03-10 23:28:24,637 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:24,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:24,637 INFO L82 PathProgramCache]: Analyzing trace with hash 290299947, now seen corresponding path program 58 times [2021-03-10 23:28:24,637 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:24,637 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331758030] [2021-03-10 23:28:24,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:24,968 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331758030] [2021-03-10 23:28:24,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625692886] [2021-03-10 23:28:24,968 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 [2021-03-10 23:28:24,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:28:24,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:24,986 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:24,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:25,349 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:25,350 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:25,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:25,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:25,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:25,354 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:25,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:25,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:25,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:25,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:25,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:25,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:25,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:25,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:25,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:25,369 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:25,369 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:25,398 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:25,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:25,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:28:25,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755489350] [2021-03-10 23:28:25,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:28:25,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:25,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:28:25,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:28:25,399 INFO L87 Difference]: Start difference. First operand 2945 states and 7558 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:27,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:27,078 INFO L93 Difference]: Finished difference Result 4122 states and 10273 transitions. [2021-03-10 23:28:27,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:28:27,078 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:27,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:27,082 INFO L225 Difference]: With dead ends: 4122 [2021-03-10 23:28:27,082 INFO L226 Difference]: Without dead ends: 4089 [2021-03-10 23:28:27,082 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 689 ImplicationChecksByTransitivity, 1696.0ms TimeCoverageRelationStatistics Valid=412, Invalid=2344, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:28:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4089 states. [2021-03-10 23:28:27,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4089 to 3033. [2021-03-10 23:28:27,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3033 states, 3032 states have (on average 2.5577176781002637) internal successors, (7755), 3032 states have internal predecessors, (7755), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:27,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3033 states to 3033 states and 7755 transitions. [2021-03-10 23:28:27,113 INFO L78 Accepts]: Start accepts. Automaton has 3033 states and 7755 transitions. Word has length 30 [2021-03-10 23:28:27,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:27,113 INFO L480 AbstractCegarLoop]: Abstraction has 3033 states and 7755 transitions. [2021-03-10 23:28:27,113 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:27,113 INFO L276 IsEmpty]: Start isEmpty. Operand 3033 states and 7755 transitions. [2021-03-10 23:28:27,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:27,116 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:27,116 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:27,331 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:27,331 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:27,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:27,331 INFO L82 PathProgramCache]: Analyzing trace with hash -1779723289, now seen corresponding path program 59 times [2021-03-10 23:28:27,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:27,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255901412] [2021-03-10 23:28:27,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:27,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255901412] [2021-03-10 23:28:27,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968779014] [2021-03-10 23:28:27,642 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 [2021-03-10 23:28:27,662 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:28:27,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:27,662 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:27,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:27,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:27,931 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,932 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,934 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,935 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:27,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,936 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,937 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:27,938 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:27,938 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:27,939 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:27,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:27,946 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:27,946 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:27,970 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:27,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:27,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:28:27,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047843296] [2021-03-10 23:28:27,970 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:28:27,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:27,971 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:28:27,971 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=515, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:28:27,971 INFO L87 Difference]: Start difference. First operand 3033 states and 7755 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:30,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:30,231 INFO L93 Difference]: Finished difference Result 4365 states and 10816 transitions. [2021-03-10 23:28:30,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-03-10 23:28:30,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:30,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:30,236 INFO L225 Difference]: With dead ends: 4365 [2021-03-10 23:28:30,236 INFO L226 Difference]: Without dead ends: 4356 [2021-03-10 23:28:30,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2039.4ms TimeCoverageRelationStatistics Valid=507, Invalid=3275, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:28:30,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-03-10 23:28:30,266 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3054. [2021-03-10 23:28:30,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3054 states, 3053 states have (on average 2.563380281690141) internal successors, (7826), 3053 states have internal predecessors, (7826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:30,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3054 states to 3054 states and 7826 transitions. [2021-03-10 23:28:30,272 INFO L78 Accepts]: Start accepts. Automaton has 3054 states and 7826 transitions. Word has length 30 [2021-03-10 23:28:30,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:30,272 INFO L480 AbstractCegarLoop]: Abstraction has 3054 states and 7826 transitions. [2021-03-10 23:28:30,272 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:30,272 INFO L276 IsEmpty]: Start isEmpty. Operand 3054 states and 7826 transitions. [2021-03-10 23:28:30,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:30,275 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:30,275 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:30,479 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,61 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:30,479 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:30,479 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:30,479 INFO L82 PathProgramCache]: Analyzing trace with hash -110703891, now seen corresponding path program 60 times [2021-03-10 23:28:30,479 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:30,479 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654985936] [2021-03-10 23:28:30,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:30,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:30,760 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:30,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654985936] [2021-03-10 23:28:30,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240195587] [2021-03-10 23:28:30,761 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 [2021-03-10 23:28:30,786 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:28:30,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:30,787 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:30,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:31,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,082 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,083 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,084 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,085 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:31,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,087 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,088 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,089 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:31,089 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:31,090 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:31,091 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:31,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:31,093 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:31,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:31,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:31,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:31,121 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:31,121 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:31,121 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 23:28:31,121 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252211376] [2021-03-10 23:28:31,121 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:28:31,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:31,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:28:31,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:28:31,122 INFO L87 Difference]: Start difference. First operand 3054 states and 7826 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:32,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:32,999 INFO L93 Difference]: Finished difference Result 4381 states and 10894 transitions. [2021-03-10 23:28:33,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:28:33,000 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:33,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:33,004 INFO L225 Difference]: With dead ends: 4381 [2021-03-10 23:28:33,004 INFO L226 Difference]: Without dead ends: 4342 [2021-03-10 23:28:33,005 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1737.9ms TimeCoverageRelationStatistics Valid=431, Invalid=2539, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:28:33,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-03-10 23:28:33,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3201. [2021-03-10 23:28:33,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3201 states, 3200 states have (on average 2.5534375) internal successors, (8171), 3200 states have internal predecessors, (8171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:33,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3201 states to 3201 states and 8171 transitions. [2021-03-10 23:28:33,065 INFO L78 Accepts]: Start accepts. Automaton has 3201 states and 8171 transitions. Word has length 30 [2021-03-10 23:28:33,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:33,065 INFO L480 AbstractCegarLoop]: Abstraction has 3201 states and 8171 transitions. [2021-03-10 23:28:33,065 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:33,065 INFO L276 IsEmpty]: Start isEmpty. Operand 3201 states and 8171 transitions. [2021-03-10 23:28:33,068 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:33,068 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:33,068 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:33,269 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:33,269 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:33,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:33,269 INFO L82 PathProgramCache]: Analyzing trace with hash -416965491, now seen corresponding path program 61 times [2021-03-10 23:28:33,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:33,269 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425262721] [2021-03-10 23:28:33,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:33,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:28:33,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425262721] [2021-03-10 23:28:33,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286304049] [2021-03-10 23:28:33,585 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) [2021-03-10 23:28:33,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:33,618 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:33,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:33,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:33,896 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:33,896 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:33,897 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:33,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:33,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:33,899 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:33,900 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:33,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:33,901 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:33,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:33,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:33,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:33,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:33,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:33,947 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:33,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:33,948 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 23:28:33,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442085893] [2021-03-10 23:28:33,948 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:28:33,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:33,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:28:33,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:28:33,949 INFO L87 Difference]: Start difference. First operand 3201 states and 8171 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:35,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:35,804 INFO L93 Difference]: Finished difference Result 3546 states and 8893 transitions. [2021-03-10 23:28:35,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:28:35,804 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:35,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:35,808 INFO L225 Difference]: With dead ends: 3546 [2021-03-10 23:28:35,808 INFO L226 Difference]: Without dead ends: 3519 [2021-03-10 23:28:35,808 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 653 ImplicationChecksByTransitivity, 1769.0ms TimeCoverageRelationStatistics Valid=347, Invalid=2305, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:28:35,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3519 states. [2021-03-10 23:28:35,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3519 to 3236. [2021-03-10 23:28:35,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3236 states, 3235 states have (on average 2.547758887171561) internal successors, (8242), 3235 states have internal predecessors, (8242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:35,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3236 states to 3236 states and 8242 transitions. [2021-03-10 23:28:35,836 INFO L78 Accepts]: Start accepts. Automaton has 3236 states and 8242 transitions. Word has length 30 [2021-03-10 23:28:35,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:35,837 INFO L480 AbstractCegarLoop]: Abstraction has 3236 states and 8242 transitions. [2021-03-10 23:28:35,837 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:35,837 INFO L276 IsEmpty]: Start isEmpty. Operand 3236 states and 8242 transitions. [2021-03-10 23:28:35,840 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:35,840 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:35,840 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:36,040 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2021-03-10 23:28:36,041 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:36,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:36,041 INFO L82 PathProgramCache]: Analyzing trace with hash -1763395665, now seen corresponding path program 62 times [2021-03-10 23:28:36,041 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:36,041 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1858791910] [2021-03-10 23:28:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:36,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:36,315 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:36,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1858791910] [2021-03-10 23:28:36,316 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759581273] [2021-03-10 23:28:36,316 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 [2021-03-10 23:28:36,334 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:28:36,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:36,335 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:36,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:36,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,636 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,636 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:36,637 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,640 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:36,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,641 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:36,642 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:36,642 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:36,643 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:36,644 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:36,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:36,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:36,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:36,671 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:36,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 23:28:36,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620353964] [2021-03-10 23:28:36,671 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:28:36,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:36,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:28:36,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:28:36,672 INFO L87 Difference]: Start difference. First operand 3236 states and 8242 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:38,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:38,332 INFO L93 Difference]: Finished difference Result 4584 states and 11321 transitions. [2021-03-10 23:28:38,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:28:38,333 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:38,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:38,337 INFO L225 Difference]: With dead ends: 4584 [2021-03-10 23:28:38,337 INFO L226 Difference]: Without dead ends: 4551 [2021-03-10 23:28:38,338 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 823 ImplicationChecksByTransitivity, 1621.8ms TimeCoverageRelationStatistics Valid=502, Invalid=2468, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:28:38,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4551 states. [2021-03-10 23:28:38,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4551 to 3249. [2021-03-10 23:28:38,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3249 states, 3248 states have (on average 2.543103448275862) internal successors, (8260), 3248 states have internal predecessors, (8260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:38,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3249 states to 3249 states and 8260 transitions. [2021-03-10 23:28:38,370 INFO L78 Accepts]: Start accepts. Automaton has 3249 states and 8260 transitions. Word has length 30 [2021-03-10 23:28:38,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:38,371 INFO L480 AbstractCegarLoop]: Abstraction has 3249 states and 8260 transitions. [2021-03-10 23:28:38,371 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:38,371 INFO L276 IsEmpty]: Start isEmpty. Operand 3249 states and 8260 transitions. [2021-03-10 23:28:38,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:38,374 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:38,374 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:38,574 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:38,574 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:38,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:38,574 INFO L82 PathProgramCache]: Analyzing trace with hash 1372978863, now seen corresponding path program 63 times [2021-03-10 23:28:38,574 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:38,575 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454858256] [2021-03-10 23:28:38,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:38,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:38,853 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:28:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454858256] [2021-03-10 23:28:38,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4793879] [2021-03-10 23:28:38,853 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 [2021-03-10 23:28:38,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:28:38,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:38,879 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 38 conjunts are in the unsatisfiable core [2021-03-10 23:28:38,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:39,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,251 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:39,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,257 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,263 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,266 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,267 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,268 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:39,303 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:39,304 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 77 treesize of output 85 [2021-03-10 23:28:39,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:28:39,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:39,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:28:39,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:94, output treesize:27 [2021-03-10 23:28:39,437 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:39,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:39,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 26 [2021-03-10 23:28:39,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792110304] [2021-03-10 23:28:39,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:28:39,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:39,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:28:39,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=614, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:28:39,439 INFO L87 Difference]: Start difference. First operand 3249 states and 8260 transitions. Second operand has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 23:28:42,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:42,680 INFO L93 Difference]: Finished difference Result 4699 states and 11550 transitions. [2021-03-10 23:28:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-03-10 23:28:42,681 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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 [2021-03-10 23:28:42,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:42,687 INFO L225 Difference]: With dead ends: 4699 [2021-03-10 23:28:42,687 INFO L226 Difference]: Without dead ends: 4669 [2021-03-10 23:28:42,687 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1522 ImplicationChecksByTransitivity, 2899.5ms TimeCoverageRelationStatistics Valid=758, Invalid=4942, Unknown=0, NotChecked=0, Total=5700 [2021-03-10 23:28:42,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4669 states. [2021-03-10 23:28:42,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4669 to 3263. [2021-03-10 23:28:42,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3263 states, 3262 states have (on average 2.54199877375843) internal successors, (8292), 3262 states have internal predecessors, (8292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:42,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3263 states to 3263 states and 8292 transitions. [2021-03-10 23:28:42,721 INFO L78 Accepts]: Start accepts. Automaton has 3263 states and 8292 transitions. Word has length 30 [2021-03-10 23:28:42,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:42,721 INFO L480 AbstractCegarLoop]: Abstraction has 3263 states and 8292 transitions. [2021-03-10 23:28:42,722 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.9259259259259258) internal successors, (52), 26 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) [2021-03-10 23:28:42,722 INFO L276 IsEmpty]: Start isEmpty. Operand 3263 states and 8292 transitions. [2021-03-10 23:28:42,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:42,724 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:42,724 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:42,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-03-10 23:28:42,925 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:42,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1969334097, now seen corresponding path program 64 times [2021-03-10 23:28:42,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:42,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464176389] [2021-03-10 23:28:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:42,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:43,235 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:43,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464176389] [2021-03-10 23:28:43,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831835476] [2021-03-10 23:28:43,235 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) [2021-03-10 23:28:43,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:28:43,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:43,264 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:43,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:28:43,565 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,566 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,569 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,570 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:43,571 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,572 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:43,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,575 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:43,576 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:43,577 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:43,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:43,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:43,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:43,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:43,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:43,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:43,604 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 23:28:43,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2024761251] [2021-03-10 23:28:43,604 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:28:43,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:43,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:28:43,604 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:28:43,604 INFO L87 Difference]: Start difference. First operand 3263 states and 8292 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-03-10 23:28:44,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:44,620 INFO L93 Difference]: Finished difference Result 3583 states and 8820 transitions. [2021-03-10 23:28:44,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-03-10 23:28:44,620 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 [2021-03-10 23:28:44,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:44,625 INFO L225 Difference]: With dead ends: 3583 [2021-03-10 23:28:44,625 INFO L226 Difference]: Without dead ends: 3556 [2021-03-10 23:28:44,625 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 485 ImplicationChecksByTransitivity, 993.6ms TimeCoverageRelationStatistics Valid=266, Invalid=1374, Unknown=0, NotChecked=0, Total=1640 [2021-03-10 23:28:44,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3556 states. [2021-03-10 23:28:44,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3556 to 3264. [2021-03-10 23:28:44,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3264 states, 3263 states have (on average 2.5375421391357644) internal successors, (8280), 3263 states have internal predecessors, (8280), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:44,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3264 states to 3264 states and 8280 transitions. [2021-03-10 23:28:44,687 INFO L78 Accepts]: Start accepts. Automaton has 3264 states and 8280 transitions. Word has length 30 [2021-03-10 23:28:44,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:44,688 INFO L480 AbstractCegarLoop]: Abstraction has 3264 states and 8280 transitions. [2021-03-10 23:28:44,688 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-03-10 23:28:44,688 INFO L276 IsEmpty]: Start isEmpty. Operand 3264 states and 8280 transitions. [2021-03-10 23:28:44,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:44,691 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:44,691 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:44,895 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2021-03-10 23:28:44,895 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:44,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:44,895 INFO L82 PathProgramCache]: Analyzing trace with hash 255609963, now seen corresponding path program 65 times [2021-03-10 23:28:44,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:44,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650085154] [2021-03-10 23:28:44,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:44,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:45,160 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:45,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650085154] [2021-03-10 23:28:45,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413377313] [2021-03-10 23:28:45,160 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 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 [2021-03-10 23:28:45,179 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-03-10 23:28:45,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:45,180 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:28:45,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:45,430 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,432 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,434 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:45,437 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:45,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:45,438 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:45,439 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:28:45,439 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:28:45,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:45,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:45,446 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:28:45,470 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:45,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:45,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 23:28:45,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1103178590] [2021-03-10 23:28:45,470 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:28:45,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:45,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:28:45,471 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:28:45,471 INFO L87 Difference]: Start difference. First operand 3264 states and 8280 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:47,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:28:47,272 INFO L93 Difference]: Finished difference Result 4182 states and 10399 transitions. [2021-03-10 23:28:47,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:28:47,272 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:28:47,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:28:47,277 INFO L225 Difference]: With dead ends: 4182 [2021-03-10 23:28:47,277 INFO L226 Difference]: Without dead ends: 4154 [2021-03-10 23:28:47,277 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 707 ImplicationChecksByTransitivity, 1573.3ms TimeCoverageRelationStatistics Valid=439, Invalid=2317, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:28:47,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2021-03-10 23:28:47,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3288. [2021-03-10 23:28:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3288 states, 3287 states have (on average 2.5543048372376025) internal successors, (8396), 3287 states have internal predecessors, (8396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:47,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3288 states to 3288 states and 8396 transitions. [2021-03-10 23:28:47,314 INFO L78 Accepts]: Start accepts. Automaton has 3288 states and 8396 transitions. Word has length 30 [2021-03-10 23:28:47,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:28:47,314 INFO L480 AbstractCegarLoop]: Abstraction has 3288 states and 8396 transitions. [2021-03-10 23:28:47,314 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:47,314 INFO L276 IsEmpty]: Start isEmpty. Operand 3288 states and 8396 transitions. [2021-03-10 23:28:47,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:28:47,317 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:28:47,317 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:28:47,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2021-03-10 23:28:47,517 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:28:47,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:28:47,517 INFO L82 PathProgramCache]: Analyzing trace with hash 921316715, now seen corresponding path program 66 times [2021-03-10 23:28:47,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:28:47,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359251081] [2021-03-10 23:28:47,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:28:47,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:28:47,768 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 9 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:47,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359251081] [2021-03-10 23:28:47,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1921416546] [2021-03-10 23:28:47,768 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 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 [2021-03-10 23:28:47,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-03-10 23:28:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:28:47,788 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:28:47,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:28:48,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:48,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:48,502 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:48,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:48,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:28:48,510 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:28:48,566 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:28:48,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-03-10 23:28:49,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-03-10 23:28:49,179 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 107 DAG size of output: 26 [2021-03-10 23:28:49,180 INFO L628 ElimStorePlain]: treesize reduction 779, result has 4.7 percent of original size [2021-03-10 23:28:49,188 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:28:49,188 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-03-10 23:28:49,313 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:28:49,313 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:28:49,313 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-03-10 23:28:49,313 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [436602489] [2021-03-10 23:28:49,314 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:28:49,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:28:49,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:28:49,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=710, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:28:49,314 INFO L87 Difference]: Start difference. First operand 3288 states and 8396 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:28:53,676 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 75 DAG size of output: 63 [2021-03-10 23:28:54,711 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:28:56,161 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 54 [2021-03-10 23:28:56,414 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 23:28:56,629 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 23:28:57,119 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:28:57,999 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 73 DAG size of output: 61 [2021-03-10 23:28:58,227 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 42 [2021-03-10 23:28:58,432 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 31 [2021-03-10 23:28:58,752 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:29:00,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:00,372 INFO L93 Difference]: Finished difference Result 5148 states and 12715 transitions. [2021-03-10 23:29:00,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 23:29:00,373 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:00,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:00,379 INFO L225 Difference]: With dead ends: 5148 [2021-03-10 23:29:00,379 INFO L226 Difference]: Without dead ends: 5075 [2021-03-10 23:29:00,380 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2270 ImplicationChecksByTransitivity, 6955.9ms TimeCoverageRelationStatistics Valid=1051, Invalid=6089, Unknown=0, NotChecked=0, Total=7140 [2021-03-10 23:29:00,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-03-10 23:29:00,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 3435. [2021-03-10 23:29:00,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3435 states, 3434 states have (on average 2.5503785672684915) internal successors, (8758), 3434 states have internal predecessors, (8758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3435 states to 3435 states and 8758 transitions. [2021-03-10 23:29:00,447 INFO L78 Accepts]: Start accepts. Automaton has 3435 states and 8758 transitions. Word has length 30 [2021-03-10 23:29:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:00,447 INFO L480 AbstractCegarLoop]: Abstraction has 3435 states and 8758 transitions. [2021-03-10 23:29:00,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:00,447 INFO L276 IsEmpty]: Start isEmpty. Operand 3435 states and 8758 transitions. [2021-03-10 23:29:00,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:00,451 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:00,452 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:00,655 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:00,656 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:00,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:00,656 INFO L82 PathProgramCache]: Analyzing trace with hash 121554607, now seen corresponding path program 67 times [2021-03-10 23:29:00,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:00,656 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [235844358] [2021-03-10 23:29:00,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:00,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:01,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [235844358] [2021-03-10 23:29:01,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097654961] [2021-03-10 23:29:01,058 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-03-10 23:29:01,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:01,084 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:29:01,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:01,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,503 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,506 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,507 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,509 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:01,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,511 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,513 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:01,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:01,516 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:01,517 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:01,517 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:29:01,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:01,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:01,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:01,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:29:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:01,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:01,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 23:29:01,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294127935] [2021-03-10 23:29:01,553 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:29:01,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:01,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:29:01,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=468, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:29:01,554 INFO L87 Difference]: Start difference. First operand 3435 states and 8758 transitions. Second operand has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-03-10 23:29:02,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:02,975 INFO L93 Difference]: Finished difference Result 4054 states and 10208 transitions. [2021-03-10 23:29:02,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-03-10 23:29:02,976 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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 [2021-03-10 23:29:02,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:02,980 INFO L225 Difference]: With dead ends: 4054 [2021-03-10 23:29:02,980 INFO L226 Difference]: Without dead ends: 4023 [2021-03-10 23:29:02,981 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 1527.4ms TimeCoverageRelationStatistics Valid=339, Invalid=1731, Unknown=0, NotChecked=0, Total=2070 [2021-03-10 23:29:02,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2021-03-10 23:29:03,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3674. [2021-03-10 23:29:03,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3674 states, 3673 states have (on average 2.560032670841274) internal successors, (9403), 3673 states have internal predecessors, (9403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:03,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3674 states to 3674 states and 9403 transitions. [2021-03-10 23:29:03,017 INFO L78 Accepts]: Start accepts. Automaton has 3674 states and 9403 transitions. Word has length 30 [2021-03-10 23:29:03,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:03,017 INFO L480 AbstractCegarLoop]: Abstraction has 3674 states and 9403 transitions. [2021-03-10 23:29:03,017 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 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) [2021-03-10 23:29:03,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3674 states and 9403 transitions. [2021-03-10 23:29:03,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:03,020 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:03,021 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:03,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable321 [2021-03-10 23:29:03,221 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:03,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:03,221 INFO L82 PathProgramCache]: Analyzing trace with hash -666829141, now seen corresponding path program 68 times [2021-03-10 23:29:03,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:03,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089956653] [2021-03-10 23:29:03,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:03,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:03,638 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 4 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:03,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089956653] [2021-03-10 23:29:03,638 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869566042] [2021-03-10 23:29:03,638 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 [2021-03-10 23:29:03,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:29:03,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:03,669 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:29:03,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:03,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,989 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,990 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:03,993 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,994 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,996 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:03,997 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:03,997 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:03,998 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:03,998 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:29:03,999 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:04,006 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:04,007 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:04,007 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:29:04,034 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:04,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:04,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 23:29:04,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418313483] [2021-03-10 23:29:04,035 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:29:04,035 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:04,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:29:04,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=477, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:29:04,035 INFO L87 Difference]: Start difference. First operand 3674 states and 9403 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:06,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:06,038 INFO L93 Difference]: Finished difference Result 4032 states and 10141 transitions. [2021-03-10 23:29:06,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:29:06,038 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:06,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:06,042 INFO L225 Difference]: With dead ends: 4032 [2021-03-10 23:29:06,042 INFO L226 Difference]: Without dead ends: 4006 [2021-03-10 23:29:06,043 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 673 ImplicationChecksByTransitivity, 1899.1ms TimeCoverageRelationStatistics Valid=401, Invalid=2251, Unknown=0, NotChecked=0, Total=2652 [2021-03-10 23:29:06,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2021-03-10 23:29:06,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 3571. [2021-03-10 23:29:06,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3571 states, 3570 states have (on average 2.553781512605042) internal successors, (9117), 3570 states have internal predecessors, (9117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:06,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3571 states to 3571 states and 9117 transitions. [2021-03-10 23:29:06,078 INFO L78 Accepts]: Start accepts. Automaton has 3571 states and 9117 transitions. Word has length 30 [2021-03-10 23:29:06,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:06,078 INFO L480 AbstractCegarLoop]: Abstraction has 3571 states and 9117 transitions. [2021-03-10 23:29:06,078 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:06,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3571 states and 9117 transitions. [2021-03-10 23:29:06,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:06,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:06,081 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:06,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-03-10 23:29:06,282 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:06,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:06,282 INFO L82 PathProgramCache]: Analyzing trace with hash 1042549111, now seen corresponding path program 69 times [2021-03-10 23:29:06,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:06,282 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530102473] [2021-03-10 23:29:06,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:06,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:06,655 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:06,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530102473] [2021-03-10 23:29:06,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201256219] [2021-03-10 23:29:06,655 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 [2021-03-10 23:29:06,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:29:06,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:06,675 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:29:06,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:07,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:07,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:07,776 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:07,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:07,792 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:07,792 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:07,793 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:07,855 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:07,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 4 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 19 case distinctions, treesize of input 69 treesize of output 127 [2021-03-10 23:29:08,143 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-03-10 23:29:08,230 INFO L628 ElimStorePlain]: treesize reduction 254, result has 12.1 percent of original size [2021-03-10 23:29:08,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:29:08,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:91, output treesize:16 [2021-03-10 23:29:08,316 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:08,316 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:08,316 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 17] total 29 [2021-03-10 23:29:08,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550823828] [2021-03-10 23:29:08,317 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-03-10 23:29:08,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:08,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-03-10 23:29:08,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=127, Invalid=743, Unknown=0, NotChecked=0, Total=870 [2021-03-10 23:29:08,317 INFO L87 Difference]: Start difference. First operand 3571 states and 9117 transitions. Second operand has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:12,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:12,195 INFO L93 Difference]: Finished difference Result 4918 states and 12146 transitions. [2021-03-10 23:29:12,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:29:12,196 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:12,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:12,201 INFO L225 Difference]: With dead ends: 4918 [2021-03-10 23:29:12,202 INFO L226 Difference]: Without dead ends: 4872 [2021-03-10 23:29:12,202 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1067 ImplicationChecksByTransitivity, 3437.6ms TimeCoverageRelationStatistics Valid=546, Invalid=3114, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:29:12,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2021-03-10 23:29:12,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3580. [2021-03-10 23:29:12,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 2.5523889354568317) internal successors, (9135), 3579 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:12,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 9135 transitions. [2021-03-10 23:29:12,239 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 9135 transitions. Word has length 30 [2021-03-10 23:29:12,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:12,239 INFO L480 AbstractCegarLoop]: Abstraction has 3580 states and 9135 transitions. [2021-03-10 23:29:12,239 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.7666666666666666) internal successors, (53), 29 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:12,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 9135 transitions. [2021-03-10 23:29:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:12,242 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:12,242 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:12,442 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable323 [2021-03-10 23:29:12,443 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:12,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:12,443 INFO L82 PathProgramCache]: Analyzing trace with hash -697866701, now seen corresponding path program 70 times [2021-03-10 23:29:12,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:12,443 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791984126] [2021-03-10 23:29:12,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:12,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:12,872 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 2 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:12,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791984126] [2021-03-10 23:29:12,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [202233332] [2021-03-10 23:29:12,872 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 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 [2021-03-10 23:29:12,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:29:12,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:12,900 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:29:12,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:13,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,353 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,354 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,356 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,357 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,358 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:13,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,360 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,364 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:13,365 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,366 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:13,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:13,368 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:13,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:29:13,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:13,379 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:13,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:13,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:29:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:13,415 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:13,415 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:29:13,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899304267] [2021-03-10 23:29:13,415 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:29:13,415 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:13,415 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:29:13,415 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=509, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:29:13,415 INFO L87 Difference]: Start difference. First operand 3580 states and 9135 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:15,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:15,226 INFO L93 Difference]: Finished difference Result 4728 states and 11773 transitions. [2021-03-10 23:29:15,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-03-10 23:29:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:15,231 INFO L225 Difference]: With dead ends: 4728 [2021-03-10 23:29:15,232 INFO L226 Difference]: Without dead ends: 4707 [2021-03-10 23:29:15,232 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 767 ImplicationChecksByTransitivity, 1968.5ms TimeCoverageRelationStatistics Valid=468, Invalid=2394, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:29:15,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4707 states. [2021-03-10 23:29:15,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4707 to 3544. [2021-03-10 23:29:15,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3544 states, 3543 states have (on average 2.5563082133784927) internal successors, (9057), 3543 states have internal predecessors, (9057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:15,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3544 states to 3544 states and 9057 transitions. [2021-03-10 23:29:15,279 INFO L78 Accepts]: Start accepts. Automaton has 3544 states and 9057 transitions. Word has length 30 [2021-03-10 23:29:15,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:15,279 INFO L480 AbstractCegarLoop]: Abstraction has 3544 states and 9057 transitions. [2021-03-10 23:29:15,280 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:15,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3544 states and 9057 transitions. [2021-03-10 23:29:15,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:15,282 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:15,282 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:15,483 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable417,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:15,483 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:15,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:15,483 INFO L82 PathProgramCache]: Analyzing trace with hash -224198605, now seen corresponding path program 71 times [2021-03-10 23:29:15,483 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:15,483 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420054844] [2021-03-10 23:29:15,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:15,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:15,876 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420054844] [2021-03-10 23:29:15,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [253291138] [2021-03-10 23:29:15,877 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 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 [2021-03-10 23:29:15,904 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:29:15,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:15,905 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:29:15,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:16,333 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,336 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,338 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:16,339 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,340 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,342 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:16,345 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,346 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:16,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:16,348 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:29:16,350 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:16,358 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:16,360 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:16,360 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:29:16,387 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:16,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:16,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 23:29:16,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265206628] [2021-03-10 23:29:16,387 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:29:16,387 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:16,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:29:16,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:29:16,388 INFO L87 Difference]: Start difference. First operand 3544 states and 9057 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-03-10 23:29:17,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:17,754 INFO L93 Difference]: Finished difference Result 4340 states and 10809 transitions. [2021-03-10 23:29:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-03-10 23:29:17,755 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 [2021-03-10 23:29:17,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:17,760 INFO L225 Difference]: With dead ends: 4340 [2021-03-10 23:29:17,760 INFO L226 Difference]: Without dead ends: 4303 [2021-03-10 23:29:17,761 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 1394.2ms TimeCoverageRelationStatistics Valid=251, Invalid=1555, Unknown=0, NotChecked=0, Total=1806 [2021-03-10 23:29:17,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4303 states. [2021-03-10 23:29:17,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4303 to 3774. [2021-03-10 23:29:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3774 states, 3773 states have (on average 2.5618870924993375) internal successors, (9666), 3773 states have internal predecessors, (9666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:17,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3774 states to 3774 states and 9666 transitions. [2021-03-10 23:29:17,809 INFO L78 Accepts]: Start accepts. Automaton has 3774 states and 9666 transitions. Word has length 30 [2021-03-10 23:29:17,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:17,809 INFO L480 AbstractCegarLoop]: Abstraction has 3774 states and 9666 transitions. [2021-03-10 23:29:17,809 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-03-10 23:29:17,809 INFO L276 IsEmpty]: Start isEmpty. Operand 3774 states and 9666 transitions. [2021-03-10 23:29:17,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:17,813 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:17,813 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:18,013 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable418,73 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:18,013 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:18,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:18,013 INFO L82 PathProgramCache]: Analyzing trace with hash 2000745455, now seen corresponding path program 72 times [2021-03-10 23:29:18,013 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:18,013 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1688157755] [2021-03-10 23:29:18,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:18,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:18,425 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:18,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1688157755] [2021-03-10 23:29:18,425 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700486689] [2021-03-10 23:29:18,425 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 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 [2021-03-10 23:29:18,444 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:29:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:18,444 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:29:18,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:18,928 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:18,929 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:18,930 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:18,930 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:18,940 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:18,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:18,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:18,942 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:18,980 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:18,980 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-03-10 23:29:18,995 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:29:19,061 INFO L628 ElimStorePlain]: treesize reduction 96, result has 28.4 percent of original size [2021-03-10 23:29:19,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:19,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:90, output treesize:50 [2021-03-10 23:29:19,236 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:19,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:19,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-03-10 23:29:19,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926220571] [2021-03-10 23:29:19,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:29:19,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:19,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:29:19,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:29:19,238 INFO L87 Difference]: Start difference. First operand 3774 states and 9666 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:19,806 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:29:20,338 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:29:20,540 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 34 [2021-03-10 23:29:21,066 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:29:21,390 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 32 [2021-03-10 23:29:21,793 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 38 [2021-03-10 23:29:21,985 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:29:22,432 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2021-03-10 23:29:23,600 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 42 [2021-03-10 23:29:24,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:24,497 INFO L93 Difference]: Finished difference Result 5542 states and 13671 transitions. [2021-03-10 23:29:24,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 23:29:24,498 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:24,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:24,505 INFO L225 Difference]: With dead ends: 5542 [2021-03-10 23:29:24,505 INFO L226 Difference]: Without dead ends: 5481 [2021-03-10 23:29:24,505 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2120 ImplicationChecksByTransitivity, 4898.3ms TimeCoverageRelationStatistics Valid=951, Invalid=5529, Unknown=0, NotChecked=0, Total=6480 [2021-03-10 23:29:24,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5481 states. [2021-03-10 23:29:24,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5481 to 3951. [2021-03-10 23:29:24,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3951 states, 3950 states have (on average 2.5582278481012657) internal successors, (10105), 3950 states have internal predecessors, (10105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:24,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3951 states to 3951 states and 10105 transitions. [2021-03-10 23:29:24,548 INFO L78 Accepts]: Start accepts. Automaton has 3951 states and 10105 transitions. Word has length 30 [2021-03-10 23:29:24,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:24,548 INFO L480 AbstractCegarLoop]: Abstraction has 3951 states and 10105 transitions. [2021-03-10 23:29:24,548 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:24,549 INFO L276 IsEmpty]: Start isEmpty. Operand 3951 states and 10105 transitions. [2021-03-10 23:29:24,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:24,552 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:24,552 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:24,752 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:24,752 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:24,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:24,753 INFO L82 PathProgramCache]: Analyzing trace with hash 269975723, now seen corresponding path program 73 times [2021-03-10 23:29:24,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:24,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60481083] [2021-03-10 23:29:24,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:24,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:25,207 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:29:25,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60481083] [2021-03-10 23:29:25,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [182846236] [2021-03-10 23:29:25,207 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:25,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:25,234 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:29:25,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:25,602 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:25,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:25,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:25,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:25,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:25,607 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:25,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:25,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:25,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:25,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:25,611 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:25,612 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:29:25,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:25,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:25,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:25,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:29:25,651 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:25,652 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:25,652 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 23:29:25,652 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358661517] [2021-03-10 23:29:25,652 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:29:25,652 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:25,652 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:29:25,652 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:29:25,652 INFO L87 Difference]: Start difference. First operand 3951 states and 10105 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:28,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:28,861 INFO L93 Difference]: Finished difference Result 4832 states and 12072 transitions. [2021-03-10 23:29:28,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:29:28,862 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:28,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:28,870 INFO L225 Difference]: With dead ends: 4832 [2021-03-10 23:29:28,870 INFO L226 Difference]: Without dead ends: 4757 [2021-03-10 23:29:28,870 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 973 ImplicationChecksByTransitivity, 2828.4ms TimeCoverageRelationStatistics Valid=498, Invalid=3162, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:29:28,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4757 states. [2021-03-10 23:29:28,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4757 to 4047. [2021-03-10 23:29:28,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4047 states, 4046 states have (on average 2.5504201680672267) internal successors, (10319), 4046 states have internal predecessors, (10319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:28,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4047 states to 4047 states and 10319 transitions. [2021-03-10 23:29:28,918 INFO L78 Accepts]: Start accepts. Automaton has 4047 states and 10319 transitions. Word has length 30 [2021-03-10 23:29:28,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:28,919 INFO L480 AbstractCegarLoop]: Abstraction has 4047 states and 10319 transitions. [2021-03-10 23:29:28,919 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:28,919 INFO L276 IsEmpty]: Start isEmpty. Operand 4047 states and 10319 transitions. [2021-03-10 23:29:28,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:28,922 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:28,922 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:29,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable430 [2021-03-10 23:29:29,122 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:29,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:29,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1628515089, now seen corresponding path program 74 times [2021-03-10 23:29:29,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:29,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935382266] [2021-03-10 23:29:29,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:29,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:29,467 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:29:29,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935382266] [2021-03-10 23:29:29,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428284413] [2021-03-10 23:29:29,467 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:29,485 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:29:29,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:29,486 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:29:29,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:29,845 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:29,847 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:29,847 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:29,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:29,850 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:29,851 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:29,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:29,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:29,854 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:29,855 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:29,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:29,856 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:29,857 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:29:29,858 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:29,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:29,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:29,867 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:29:29,898 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:29,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:29,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 23:29:29,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880867344] [2021-03-10 23:29:29,899 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:29:29,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:29,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:29:29,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=445, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:29:29,899 INFO L87 Difference]: Start difference. First operand 4047 states and 10319 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:32,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:32,900 INFO L93 Difference]: Finished difference Result 4590 states and 11529 transitions. [2021-03-10 23:29:32,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-03-10 23:29:32,901 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:32,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:32,907 INFO L225 Difference]: With dead ends: 4590 [2021-03-10 23:29:32,907 INFO L226 Difference]: Without dead ends: 4548 [2021-03-10 23:29:32,907 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 690 ImplicationChecksByTransitivity, 2468.5ms TimeCoverageRelationStatistics Valid=372, Invalid=2490, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:29:32,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4548 states. [2021-03-10 23:29:32,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4548 to 4096. [2021-03-10 23:29:32,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4096 states, 4095 states have (on average 2.547008547008547) internal successors, (10430), 4095 states have internal predecessors, (10430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:32,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4096 states to 4096 states and 10430 transitions. [2021-03-10 23:29:32,945 INFO L78 Accepts]: Start accepts. Automaton has 4096 states and 10430 transitions. Word has length 30 [2021-03-10 23:29:32,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:32,945 INFO L480 AbstractCegarLoop]: Abstraction has 4096 states and 10430 transitions. [2021-03-10 23:29:32,945 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:32,945 INFO L276 IsEmpty]: Start isEmpty. Operand 4096 states and 10430 transitions. [2021-03-10 23:29:32,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:32,949 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:32,949 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:33,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:33,164 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:33,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:33,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1834453521, now seen corresponding path program 75 times [2021-03-10 23:29:33,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:33,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656964016] [2021-03-10 23:29:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:33,604 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:33,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656964016] [2021-03-10 23:29:33,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605106319] [2021-03-10 23:29:33,604 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:33,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-03-10 23:29:33,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:33,624 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:29:33,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:34,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:34,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:34,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:34,352 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:34,356 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:34,363 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:34,457 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:34,457 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-03-10 23:29:34,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-03-10 23:29:35,035 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 103 DAG size of output: 26 [2021-03-10 23:29:35,035 INFO L628 ElimStorePlain]: treesize reduction 699, result has 5.2 percent of original size [2021-03-10 23:29:35,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:35,042 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-03-10 23:29:35,218 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:35,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:35,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-03-10 23:29:35,218 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442124884] [2021-03-10 23:29:35,218 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:29:35,218 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:35,218 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:29:35,219 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=717, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:29:35,219 INFO L87 Difference]: Start difference. First operand 4096 states and 10430 transitions. Second operand has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:35,918 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 30 [2021-03-10 23:29:36,626 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 40 [2021-03-10 23:29:37,478 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 29 [2021-03-10 23:29:38,044 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 50 [2021-03-10 23:29:38,246 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 31 [2021-03-10 23:29:39,143 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-03-10 23:29:39,326 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 23:29:39,820 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 57 [2021-03-10 23:29:40,519 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 64 [2021-03-10 23:29:40,781 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 48 [2021-03-10 23:29:41,795 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:29:42,169 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 59 [2021-03-10 23:29:45,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:45,701 INFO L93 Difference]: Finished difference Result 5448 states and 13472 transitions. [2021-03-10 23:29:45,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 23:29:45,702 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:45,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:45,708 INFO L225 Difference]: With dead ends: 5448 [2021-03-10 23:29:45,708 INFO L226 Difference]: Without dead ends: 5389 [2021-03-10 23:29:45,709 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 14 SyntacticMatches, 3 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 6754.7ms TimeCoverageRelationStatistics Valid=840, Invalid=5802, Unknown=0, NotChecked=0, Total=6642 [2021-03-10 23:29:45,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5389 states. [2021-03-10 23:29:45,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5389 to 4187. [2021-03-10 23:29:45,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4187 states, 4186 states have (on average 2.542761586239847) internal successors, (10644), 4186 states have internal predecessors, (10644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:45,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4187 states to 4187 states and 10644 transitions. [2021-03-10 23:29:45,750 INFO L78 Accepts]: Start accepts. Automaton has 4187 states and 10644 transitions. Word has length 30 [2021-03-10 23:29:45,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:45,750 INFO L480 AbstractCegarLoop]: Abstraction has 4187 states and 10644 transitions. [2021-03-10 23:29:45,750 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 1.8275862068965518) internal successors, (53), 28 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:45,750 INFO L276 IsEmpty]: Start isEmpty. Operand 4187 states and 10644 transitions. [2021-03-10 23:29:45,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:45,754 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:45,754 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:45,954 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable432 [2021-03-10 23:29:45,954 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:45,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:45,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1966954945, now seen corresponding path program 76 times [2021-03-10 23:29:45,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:45,955 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435464685] [2021-03-10 23:29:45,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:45,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:46,688 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:46,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435464685] [2021-03-10 23:29:46,689 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345631585] [2021-03-10 23:29:46,689 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:46,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:29:46,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:46,707 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:29:46,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:47,202 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,204 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,205 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,205 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:47,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:47,211 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:47,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:47,215 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:47,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:29:47,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:47,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:47,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:47,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:29:47,264 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:47,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:47,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:29:47,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867630000] [2021-03-10 23:29:47,264 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:29:47,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:47,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:29:47,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:29:47,265 INFO L87 Difference]: Start difference. First operand 4187 states and 10644 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:50,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:50,378 INFO L93 Difference]: Finished difference Result 5642 states and 13873 transitions. [2021-03-10 23:29:50,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:29:50,380 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:50,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:50,387 INFO L225 Difference]: With dead ends: 5642 [2021-03-10 23:29:50,387 INFO L226 Difference]: Without dead ends: 5593 [2021-03-10 23:29:50,388 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 696 ImplicationChecksByTransitivity, 3020.1ms TimeCoverageRelationStatistics Valid=389, Invalid=2473, Unknown=0, NotChecked=0, Total=2862 [2021-03-10 23:29:50,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5593 states. [2021-03-10 23:29:50,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5593 to 4299. [2021-03-10 23:29:50,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4299 states, 4298 states have (on average 2.5418799441600743) internal successors, (10925), 4298 states have internal predecessors, (10925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:50,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4299 states to 4299 states and 10925 transitions. [2021-03-10 23:29:50,432 INFO L78 Accepts]: Start accepts. Automaton has 4299 states and 10925 transitions. Word has length 30 [2021-03-10 23:29:50,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:50,432 INFO L480 AbstractCegarLoop]: Abstraction has 4299 states and 10925 transitions. [2021-03-10 23:29:50,432 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:50,432 INFO L276 IsEmpty]: Start isEmpty. Operand 4299 states and 10925 transitions. [2021-03-10 23:29:50,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:50,436 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:50,437 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:50,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable557 [2021-03-10 23:29:50,657 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:50,658 INFO L82 PathProgramCache]: Analyzing trace with hash -477602821, now seen corresponding path program 77 times [2021-03-10 23:29:50,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:50,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214087761] [2021-03-10 23:29:50,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:50,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:51,238 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214087761] [2021-03-10 23:29:51,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468906150] [2021-03-10 23:29:51,239 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:51,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:29:51,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:51,259 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:29:51,260 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:51,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,716 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:51,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,726 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,728 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,729 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:51,730 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,732 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:51,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:51,733 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:51,734 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:29:51,737 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:29:51,751 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:51,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:29:51,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:29:51,806 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:51,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:51,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:29:51,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647555154] [2021-03-10 23:29:51,807 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:29:51,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:51,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:29:51,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:29:51,807 INFO L87 Difference]: Start difference. First operand 4299 states and 10925 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:54,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:29:54,605 INFO L93 Difference]: Finished difference Result 5438 states and 13503 transitions. [2021-03-10 23:29:54,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-03-10 23:29:54,607 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:29:54,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:29:54,614 INFO L225 Difference]: With dead ends: 5438 [2021-03-10 23:29:54,614 INFO L226 Difference]: Without dead ends: 5387 [2021-03-10 23:29:54,615 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 2620.0ms TimeCoverageRelationStatistics Valid=333, Invalid=2117, Unknown=0, NotChecked=0, Total=2450 [2021-03-10 23:29:54,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5387 states. [2021-03-10 23:29:54,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5387 to 4354. [2021-03-10 23:29:54,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4354 states, 4353 states have (on average 2.535722490236618) internal successors, (11038), 4353 states have internal predecessors, (11038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:54,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4354 states to 4354 states and 11038 transitions. [2021-03-10 23:29:54,687 INFO L78 Accepts]: Start accepts. Automaton has 4354 states and 11038 transitions. Word has length 30 [2021-03-10 23:29:54,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:29:54,687 INFO L480 AbstractCegarLoop]: Abstraction has 4354 states and 11038 transitions. [2021-03-10 23:29:54,687 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:54,688 INFO L276 IsEmpty]: Start isEmpty. Operand 4354 states and 11038 transitions. [2021-03-10 23:29:54,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:29:54,692 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:29:54,692 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:29:54,892 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-03-10 23:29:54,893 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:29:54,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:29:54,893 INFO L82 PathProgramCache]: Analyzing trace with hash 475012403, now seen corresponding path program 78 times [2021-03-10 23:29:54,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:29:54,893 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750432690] [2021-03-10 23:29:54,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:29:54,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:29:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:55,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750432690] [2021-03-10 23:29:55,311 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [625565520] [2021-03-10 23:29:55,311 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:29:55,330 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:29:55,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:29:55,331 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:29:55,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:29:56,143 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:56,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:56,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:56,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:56,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:29:56,164 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:29:56,218 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:29:56,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 5 new quantified variables, introduced 13 case distinctions, treesize of input 65 treesize of output 75 [2021-03-10 23:29:56,237 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:29:56,322 INFO L628 ElimStorePlain]: treesize reduction 90, result has 28.0 percent of original size [2021-03-10 23:29:56,330 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:29:56,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:87, output treesize:16 [2021-03-10 23:29:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:29:56,417 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:29:56,417 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-03-10 23:29:56,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144880944] [2021-03-10 23:29:56,418 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:29:56,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:29:56,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:29:56,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=647, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:29:56,418 INFO L87 Difference]: Start difference. First operand 4354 states and 11038 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:29:58,923 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 31 [2021-03-10 23:29:59,392 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 31 [2021-03-10 23:30:01,659 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 23:30:03,893 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:03,893 INFO L93 Difference]: Finished difference Result 5792 states and 14294 transitions. [2021-03-10 23:30:03,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 23:30:03,895 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:03,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:03,902 INFO L225 Difference]: With dead ends: 5792 [2021-03-10 23:30:03,902 INFO L226 Difference]: Without dead ends: 5753 [2021-03-10 23:30:03,902 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 5019.3ms TimeCoverageRelationStatistics Valid=713, Invalid=4543, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:30:03,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5753 states. [2021-03-10 23:30:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5753 to 4546. [2021-03-10 23:30:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4546 states, 4545 states have (on average 2.541034103410341) internal successors, (11549), 4545 states have internal predecessors, (11549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:03,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4546 states to 4546 states and 11549 transitions. [2021-03-10 23:30:03,953 INFO L78 Accepts]: Start accepts. Automaton has 4546 states and 11549 transitions. Word has length 30 [2021-03-10 23:30:03,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:03,953 INFO L480 AbstractCegarLoop]: Abstraction has 4546 states and 11549 transitions. [2021-03-10 23:30:03,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 4546 states and 11549 transitions. [2021-03-10 23:30:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:03,957 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:03,957 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:04,157 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable559,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:04,157 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:04,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:04,158 INFO L82 PathProgramCache]: Analyzing trace with hash -1825489737, now seen corresponding path program 79 times [2021-03-10 23:30:04,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:04,158 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352301862] [2021-03-10 23:30:04,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:04,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352301862] [2021-03-10 23:30:04,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462276956] [2021-03-10 23:30:04,664 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:04,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:04,683 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:30:04,683 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:05,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,176 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,179 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:05,181 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,184 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:05,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:05,187 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:05,188 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:05,189 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:30:05,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:30:05,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:05,203 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:05,203 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:30:05,246 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:05,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:05,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 23:30:05,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388262537] [2021-03-10 23:30:05,247 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:30:05,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:05,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:30:05,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:30:05,247 INFO L87 Difference]: Start difference. First operand 4546 states and 11549 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:06,788 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:30:07,410 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 36 [2021-03-10 23:30:08,110 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 23:30:09,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:09,639 INFO L93 Difference]: Finished difference Result 5385 states and 13364 transitions. [2021-03-10 23:30:09,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:30:09,641 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:09,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:09,648 INFO L225 Difference]: With dead ends: 5385 [2021-03-10 23:30:09,648 INFO L226 Difference]: Without dead ends: 5328 [2021-03-10 23:30:09,649 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 3746.6ms TimeCoverageRelationStatistics Valid=543, Invalid=2997, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:30:09,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-03-10 23:30:09,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4639. [2021-03-10 23:30:09,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4639 states, 4638 states have (on average 2.5433376455368695) internal successors, (11796), 4638 states have internal predecessors, (11796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4639 states to 4639 states and 11796 transitions. [2021-03-10 23:30:09,707 INFO L78 Accepts]: Start accepts. Automaton has 4639 states and 11796 transitions. Word has length 30 [2021-03-10 23:30:09,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:09,708 INFO L480 AbstractCegarLoop]: Abstraction has 4639 states and 11796 transitions. [2021-03-10 23:30:09,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:09,708 INFO L276 IsEmpty]: Start isEmpty. Operand 4639 states and 11796 transitions. [2021-03-10 23:30:09,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:09,712 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:09,712 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:09,912 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-03-10 23:30:09,912 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:09,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:09,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1805369083, now seen corresponding path program 80 times [2021-03-10 23:30:09,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:09,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966575043] [2021-03-10 23:30:09,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:09,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:10,501 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 6 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966575043] [2021-03-10 23:30:10,501 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1717134166] [2021-03-10 23:30:10,501 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:10,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:30:10,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:10,520 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:30:10,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:11,112 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:11,113 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:11,115 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:11,117 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:11,118 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:11,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:11,122 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:11,122 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:11,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:11,125 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:11,127 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:11,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:11,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:30:11,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:30:11,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:11,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:11,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:30:11,197 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:11,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:11,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 12] total 24 [2021-03-10 23:30:11,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53244378] [2021-03-10 23:30:11,197 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:30:11,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:11,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:30:11,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=514, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:30:11,198 INFO L87 Difference]: Start difference. First operand 4639 states and 11796 transitions. Second operand has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:12,129 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 33 [2021-03-10 23:30:14,299 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 48 [2021-03-10 23:30:14,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:14,796 INFO L93 Difference]: Finished difference Result 5863 states and 14459 transitions. [2021-03-10 23:30:14,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-03-10 23:30:14,797 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:14,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:14,804 INFO L225 Difference]: With dead ends: 5863 [2021-03-10 23:30:14,804 INFO L226 Difference]: Without dead ends: 5822 [2021-03-10 23:30:14,805 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 774 ImplicationChecksByTransitivity, 3286.9ms TimeCoverageRelationStatistics Valid=420, Invalid=2336, Unknown=0, NotChecked=0, Total=2756 [2021-03-10 23:30:14,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5822 states. [2021-03-10 23:30:14,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5822 to 4655. [2021-03-10 23:30:14,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 2.545122475290073) internal successors, (11845), 4654 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) [2021-03-10 23:30:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 11845 transitions. [2021-03-10 23:30:14,883 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 11845 transitions. Word has length 30 [2021-03-10 23:30:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:14,883 INFO L480 AbstractCegarLoop]: Abstraction has 4655 states and 11845 transitions. [2021-03-10 23:30:14,883 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.12) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 11845 transitions. [2021-03-10 23:30:14,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:14,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:14,887 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:15,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable570,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:15,088 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:15,088 INFO L82 PathProgramCache]: Analyzing trace with hash -2135450317, now seen corresponding path program 81 times [2021-03-10 23:30:15,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:15,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446677685] [2021-03-10 23:30:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:15,611 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:30:15,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446677685] [2021-03-10 23:30:15,611 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746601947] [2021-03-10 23:30:15,611 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:15,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:30:15,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:15,631 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 41 conjunts are in the unsatisfiable core [2021-03-10 23:30:15,631 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:16,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,729 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,731 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,735 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,736 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:16,738 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,748 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:16,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:16,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 15 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 6 case distinctions, treesize of input 65 treesize of output 79 [2021-03-10 23:30:16,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:30:16,863 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:16,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:16,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:85, output treesize:21 [2021-03-10 23:30:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:17,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:17,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-03-10 23:30:17,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819030292] [2021-03-10 23:30:17,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:30:17,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:30:17,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=654, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:30:17,013 INFO L87 Difference]: Start difference. First operand 4655 states and 11845 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:19,609 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 39 [2021-03-10 23:30:21,147 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 46 [2021-03-10 23:30:23,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:23,669 INFO L93 Difference]: Finished difference Result 5156 states and 12926 transitions. [2021-03-10 23:30:23,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:30:23,672 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:23,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:23,679 INFO L225 Difference]: With dead ends: 5156 [2021-03-10 23:30:23,679 INFO L226 Difference]: Without dead ends: 5130 [2021-03-10 23:30:23,680 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 3 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 3674.3ms TimeCoverageRelationStatistics Valid=368, Invalid=2602, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:30:23,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5130 states. [2021-03-10 23:30:23,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5130 to 4730. [2021-03-10 23:30:23,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4730 states, 4729 states have (on average 2.5470501163036583) internal successors, (12045), 4729 states have internal predecessors, (12045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:23,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4730 states to 4730 states and 12045 transitions. [2021-03-10 23:30:23,753 INFO L78 Accepts]: Start accepts. Automaton has 4730 states and 12045 transitions. Word has length 30 [2021-03-10 23:30:23,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:23,753 INFO L480 AbstractCegarLoop]: Abstraction has 4730 states and 12045 transitions. [2021-03-10 23:30:23,754 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:23,754 INFO L276 IsEmpty]: Start isEmpty. Operand 4730 states and 12045 transitions. [2021-03-10 23:30:23,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:23,758 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:23,758 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:23,959 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable571,83 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:23,959 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:23,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:23,959 INFO L82 PathProgramCache]: Analyzing trace with hash -140985161, now seen corresponding path program 82 times [2021-03-10 23:30:23,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:23,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038722942] [2021-03-10 23:30:23,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:23,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:24,518 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:30:24,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038722942] [2021-03-10 23:30:24,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581796985] [2021-03-10 23:30:24,519 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:24,539 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:30:24,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:24,540 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:30:24,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:25,114 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:25,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:25,116 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:25,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:25,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:25,121 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:25,123 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:25,125 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:25,126 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:25,127 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:25,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:25,129 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:30:25,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:30:25,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:25,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:25,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:30:25,199 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:25,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:25,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 23:30:25,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283161265] [2021-03-10 23:30:25,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:30:25,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:25,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:30:25,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:30:25,200 INFO L87 Difference]: Start difference. First operand 4730 states and 12045 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:25,917 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2021-03-10 23:30:26,468 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 36 [2021-03-10 23:30:27,030 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 34 [2021-03-10 23:30:28,406 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 41 [2021-03-10 23:30:29,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:29,992 INFO L93 Difference]: Finished difference Result 5448 states and 13572 transitions. [2021-03-10 23:30:29,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:30:29,994 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:29,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:30,001 INFO L225 Difference]: With dead ends: 5448 [2021-03-10 23:30:30,001 INFO L226 Difference]: Without dead ends: 5389 [2021-03-10 23:30:30,002 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 934 ImplicationChecksByTransitivity, 4134.3ms TimeCoverageRelationStatistics Valid=532, Invalid=2890, Unknown=0, NotChecked=0, Total=3422 [2021-03-10 23:30:30,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5389 states. [2021-03-10 23:30:30,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5389 to 4607. [2021-03-10 23:30:30,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4607 states, 4606 states have (on average 2.5432045158488927) internal successors, (11714), 4606 states have internal predecessors, (11714), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:30,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4607 states to 4607 states and 11714 transitions. [2021-03-10 23:30:30,050 INFO L78 Accepts]: Start accepts. Automaton has 4607 states and 11714 transitions. Word has length 30 [2021-03-10 23:30:30,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:30,050 INFO L480 AbstractCegarLoop]: Abstraction has 4607 states and 11714 transitions. [2021-03-10 23:30:30,050 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:30,050 INFO L276 IsEmpty]: Start isEmpty. Operand 4607 states and 11714 transitions. [2021-03-10 23:30:30,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:30,054 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:30,054 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:30,254 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable579 [2021-03-10 23:30:30,254 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:30,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:30,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1379696265, now seen corresponding path program 83 times [2021-03-10 23:30:30,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:30,255 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484852182] [2021-03-10 23:30:30,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:30,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:30,816 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:30:30,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484852182] [2021-03-10 23:30:30,816 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210657841] [2021-03-10 23:30:30,816 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:30,836 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:30:30,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:30,837 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:30:30,837 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:31,551 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,556 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,559 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,561 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,564 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,565 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:31,567 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,570 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,571 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:31,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,575 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:31,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:31,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:31,582 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:30:31,585 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:30:31,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:31,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:30:31,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:30:31,676 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:31,676 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:31,676 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-03-10 23:30:31,676 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254762709] [2021-03-10 23:30:31,677 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:30:31,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:31,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:30:31,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:30:31,677 INFO L87 Difference]: Start difference. First operand 4607 states and 11714 transitions. Second operand has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:33,145 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 23:30:34,540 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:30:35,128 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 43 [2021-03-10 23:30:35,480 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 28 [2021-03-10 23:30:36,026 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-10 23:30:36,616 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 23:30:37,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:30:37,668 INFO L93 Difference]: Finished difference Result 5022 states and 12567 transitions. [2021-03-10 23:30:37,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:30:37,671 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:30:37,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:30:37,677 INFO L225 Difference]: With dead ends: 5022 [2021-03-10 23:30:37,677 INFO L226 Difference]: Without dead ends: 4967 [2021-03-10 23:30:37,678 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1204 ImplicationChecksByTransitivity, 5230.5ms TimeCoverageRelationStatistics Valid=506, Invalid=3526, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 23:30:37,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4967 states. [2021-03-10 23:30:37,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4967 to 4713. [2021-03-10 23:30:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4713 states, 4712 states have (on average 2.5367147707979627) internal successors, (11953), 4712 states have internal predecessors, (11953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:37,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4713 states to 4713 states and 11953 transitions. [2021-03-10 23:30:37,723 INFO L78 Accepts]: Start accepts. Automaton has 4713 states and 11953 transitions. Word has length 30 [2021-03-10 23:30:37,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:30:37,723 INFO L480 AbstractCegarLoop]: Abstraction has 4713 states and 11953 transitions. [2021-03-10 23:30:37,723 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.272727272727273) internal successors, (50), 21 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:37,723 INFO L276 IsEmpty]: Start isEmpty. Operand 4713 states and 11953 transitions. [2021-03-10 23:30:37,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:30:37,728 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:30:37,728 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:30:37,928 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,85 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:37,929 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:30:37,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:30:37,929 INFO L82 PathProgramCache]: Analyzing trace with hash 1813763767, now seen corresponding path program 84 times [2021-03-10 23:30:37,929 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:30:37,929 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057337738] [2021-03-10 23:30:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:30:37,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:30:38,512 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:38,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057337738] [2021-03-10 23:30:38,513 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150605742] [2021-03-10 23:30:38,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:30:38,534 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-03-10 23:30:38,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:30:38,534 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:30:38,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:30:41,213 WARN L205 SmtUtils]: Spent 569.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:30:41,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,616 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,633 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,665 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:30:41,667 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:30:41,834 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification that was a NOOP. DAG size: 65 [2021-03-10 23:30:41,835 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:30:41,835 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 9 disjoint index pairs (out of 28 index pairs), introduced 7 new quantified variables, introduced 18 case distinctions, treesize of input 73 treesize of output 141 [2021-03-10 23:30:42,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-03-10 23:30:42,691 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 23 [2021-03-10 23:30:42,692 INFO L628 ElimStorePlain]: treesize reduction 235, result has 13.0 percent of original size [2021-03-10 23:30:42,703 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:30:42,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:95, output treesize:22 [2021-03-10 23:30:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:30:42,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:30:42,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-03-10 23:30:42,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981277789] [2021-03-10 23:30:42,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:30:42,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:30:42,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:30:42,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=663, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:30:42,851 INFO L87 Difference]: Start difference. First operand 4713 states and 11953 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:30:43,321 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:30:45,792 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 23:30:46,636 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 45 [2021-03-10 23:30:48,438 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 23:30:48,661 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 47 [2021-03-10 23:30:51,273 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 23:30:53,102 WARN L205 SmtUtils]: Spent 245.00 ms on a formula simplification that was a NOOP. DAG size: 49 [2021-03-10 23:30:54,440 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 32 [2021-03-10 23:30:59,711 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:31:01,291 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 50 [2021-03-10 23:31:01,706 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:31:02,006 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 23:31:02,446 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:31:02,763 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2021-03-10 23:31:04,435 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 26 [2021-03-10 23:31:06,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:31:06,342 INFO L93 Difference]: Finished difference Result 6090 states and 15009 transitions. [2021-03-10 23:31:06,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-03-10 23:31:06,344 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:31:06,345 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:31:06,353 INFO L225 Difference]: With dead ends: 6090 [2021-03-10 23:31:06,353 INFO L226 Difference]: Without dead ends: 6070 [2021-03-10 23:31:06,353 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1592 ImplicationChecksByTransitivity, 13627.5ms TimeCoverageRelationStatistics Valid=582, Invalid=4674, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:31:06,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6070 states. [2021-03-10 23:31:06,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6070 to 4827. [2021-03-10 23:31:06,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4827 states, 4826 states have (on average 2.544135930377124) internal successors, (12278), 4826 states have internal predecessors, (12278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:06,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4827 states to 4827 states and 12278 transitions. [2021-03-10 23:31:06,424 INFO L78 Accepts]: Start accepts. Automaton has 4827 states and 12278 transitions. Word has length 30 [2021-03-10 23:31:06,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:31:06,424 INFO L480 AbstractCegarLoop]: Abstraction has 4827 states and 12278 transitions. [2021-03-10 23:31:06,424 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:06,424 INFO L276 IsEmpty]: Start isEmpty. Operand 4827 states and 12278 transitions. [2021-03-10 23:31:06,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:31:06,428 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:31:06,428 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:31:06,643 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable581,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:31:06,643 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:31:06,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:31:06,643 INFO L82 PathProgramCache]: Analyzing trace with hash -1198645453, now seen corresponding path program 85 times [2021-03-10 23:31:06,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:31:06,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40262092] [2021-03-10 23:31:06,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:31:06,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:31:07,299 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:07,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40262092] [2021-03-10 23:31:07,299 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691428892] [2021-03-10 23:31:07,299 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:31:07,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:31:07,318 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:31:07,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:31:08,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:08,171 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:08,172 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:08,174 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:08,177 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:08,180 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:08,182 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:08,184 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:08,185 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:08,186 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:08,189 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:08,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:08,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:31:08,194 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:31:08,212 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:08,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:31:08,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:31:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:08,280 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:31:08,280 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 23:31:08,280 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1742117615] [2021-03-10 23:31:08,280 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:31:08,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:31:08,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:31:08,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=434, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:31:08,280 INFO L87 Difference]: Start difference. First operand 4827 states and 12278 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-03-10 23:31:08,579 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:31:09,064 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:31:09,630 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:31:10,133 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-10 23:31:10,303 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:31:10,801 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:31:11,057 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:31:11,896 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:31:12,531 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:31:13,197 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 21 [2021-03-10 23:31:14,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:31:14,067 INFO L93 Difference]: Finished difference Result 5512 states and 13785 transitions. [2021-03-10 23:31:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:31:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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 [2021-03-10 23:31:14,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:31:14,077 INFO L225 Difference]: With dead ends: 5512 [2021-03-10 23:31:14,077 INFO L226 Difference]: Without dead ends: 5452 [2021-03-10 23:31:14,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 920 ImplicationChecksByTransitivity, 4920.9ms TimeCoverageRelationStatistics Valid=456, Invalid=2736, Unknown=0, NotChecked=0, Total=3192 [2021-03-10 23:31:14,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5452 states. [2021-03-10 23:31:14,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5452 to 5013. [2021-03-10 23:31:14,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5013 states, 5012 states have (on average 2.5548683160415004) internal successors, (12805), 5012 states have internal predecessors, (12805), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:14,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5013 states to 5013 states and 12805 transitions. [2021-03-10 23:31:14,131 INFO L78 Accepts]: Start accepts. Automaton has 5013 states and 12805 transitions. Word has length 30 [2021-03-10 23:31:14,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:31:14,131 INFO L480 AbstractCegarLoop]: Abstraction has 5013 states and 12805 transitions. [2021-03-10 23:31:14,131 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 22 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) [2021-03-10 23:31:14,131 INFO L276 IsEmpty]: Start isEmpty. Operand 5013 states and 12805 transitions. [2021-03-10 23:31:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:31:14,135 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:31:14,135 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:31:14,335 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable732 [2021-03-10 23:31:14,335 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:31:14,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:31:14,336 INFO L82 PathProgramCache]: Analyzing trace with hash 409447283, now seen corresponding path program 86 times [2021-03-10 23:31:14,336 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:31:14,336 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151843321] [2021-03-10 23:31:14,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:31:14,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:31:15,115 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:15,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151843321] [2021-03-10 23:31:15,115 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027368264] [2021-03-10 23:31:15,115 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:31:15,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:31:15,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:31:15,134 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:31:15,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:31:15,933 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,935 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,939 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,941 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,944 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,946 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,948 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:15,949 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:15,952 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,954 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,958 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:15,959 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:15,960 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:15,962 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:31:15,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:31:15,984 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:15,988 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:31:15,988 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:31:16,072 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:16,072 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:31:16,072 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12] total 22 [2021-03-10 23:31:16,072 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224555557] [2021-03-10 23:31:16,072 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:31:16,072 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:31:16,072 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:31:16,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:31:16,073 INFO L87 Difference]: Start difference. First operand 5013 states and 12805 transitions. Second operand has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:16,664 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 23:31:16,823 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 23 [2021-03-10 23:31:17,138 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-10 23:31:17,376 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-03-10 23:31:17,680 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 29 [2021-03-10 23:31:18,286 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 29 [2021-03-10 23:31:18,486 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 28 [2021-03-10 23:31:18,854 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 30 [2021-03-10 23:31:19,379 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:31:19,874 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 27 [2021-03-10 23:31:20,089 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 23:31:21,165 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:31:21,509 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:31:21,937 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 39 [2021-03-10 23:31:22,821 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 29 [2021-03-10 23:31:23,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:31:23,023 INFO L93 Difference]: Finished difference Result 5679 states and 14293 transitions. [2021-03-10 23:31:23,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:31:23,026 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:31:23,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:31:23,034 INFO L225 Difference]: With dead ends: 5679 [2021-03-10 23:31:23,034 INFO L226 Difference]: Without dead ends: 5613 [2021-03-10 23:31:23,035 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 913 ImplicationChecksByTransitivity, 6052.9ms TimeCoverageRelationStatistics Valid=473, Invalid=2833, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:31:23,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5613 states. [2021-03-10 23:31:23,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5613 to 5120. [2021-03-10 23:31:23,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5120 states, 5119 states have (on average 2.5514748974409063) internal successors, (13061), 5119 states have internal predecessors, (13061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:23,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5120 states to 5120 states and 13061 transitions. [2021-03-10 23:31:23,087 INFO L78 Accepts]: Start accepts. Automaton has 5120 states and 13061 transitions. Word has length 30 [2021-03-10 23:31:23,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:31:23,087 INFO L480 AbstractCegarLoop]: Abstraction has 5120 states and 13061 transitions. [2021-03-10 23:31:23,087 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:23,087 INFO L276 IsEmpty]: Start isEmpty. Operand 5120 states and 13061 transitions. [2021-03-10 23:31:23,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:31:23,091 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:31:23,091 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:31:23,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable733 [2021-03-10 23:31:23,292 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:31:23,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:31:23,292 INFO L82 PathProgramCache]: Analyzing trace with hash 203508851, now seen corresponding path program 87 times [2021-03-10 23:31:23,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:31:23,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853748075] [2021-03-10 23:31:23,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:31:23,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:31:23,764 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:31:24,224 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:31:24,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853748075] [2021-03-10 23:31:24,225 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979899271] [2021-03-10 23:31:24,225 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:31:24,270 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:31:24,270 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:31:24,271 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 39 conjunts are in the unsatisfiable core [2021-03-10 23:31:24,271 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:31:25,750 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:25,771 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:25,789 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:25,790 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:25,807 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:26,007 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification that was a NOOP. DAG size: 62 [2021-03-10 23:31:26,008 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:26,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 3 disjoint index pairs (out of 28 index pairs), introduced 6 new quantified variables, introduced 20 case distinctions, treesize of input 69 treesize of output 137 [2021-03-10 23:31:26,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:31:26,847 WARN L205 SmtUtils]: Spent 419.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 26 [2021-03-10 23:31:26,848 INFO L628 ElimStorePlain]: treesize reduction 544, result has 6.5 percent of original size [2021-03-10 23:31:26,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:31:26,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:94, output treesize:50 [2021-03-10 23:31:27,092 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-10 23:31:27,283 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:27,283 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:31:27,283 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 17] total 27 [2021-03-10 23:31:27,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702057202] [2021-03-10 23:31:27,284 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:31:27,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:31:27,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:31:27,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=666, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:31:27,284 INFO L87 Difference]: Start difference. First operand 5120 states and 13061 transitions. Second operand has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:28,341 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 23 [2021-03-10 23:31:28,839 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 27 [2021-03-10 23:31:29,315 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 33 [2021-03-10 23:31:29,624 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:31:29,994 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 23 [2021-03-10 23:31:30,640 WARN L205 SmtUtils]: Spent 297.00 ms on a formula simplification. DAG size of input: 71 DAG size of output: 33 [2021-03-10 23:31:31,319 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 23:31:31,570 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-10 23:31:31,846 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-03-10 23:31:32,261 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 36 [2021-03-10 23:31:32,657 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 26 [2021-03-10 23:31:32,881 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 27 [2021-03-10 23:31:33,294 WARN L205 SmtUtils]: Spent 324.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 38 [2021-03-10 23:31:33,947 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 44 [2021-03-10 23:31:34,654 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 31 [2021-03-10 23:31:34,991 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 36 [2021-03-10 23:31:35,582 WARN L205 SmtUtils]: Spent 338.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 35 [2021-03-10 23:31:35,948 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 82 DAG size of output: 52 [2021-03-10 23:31:36,210 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-03-10 23:31:36,653 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 44 [2021-03-10 23:31:37,313 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 55 [2021-03-10 23:31:37,757 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2021-03-10 23:31:38,614 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 49 [2021-03-10 23:31:39,224 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-10 23:31:39,603 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 27 [2021-03-10 23:31:39,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:31:39,715 INFO L93 Difference]: Finished difference Result 6380 states and 15938 transitions. [2021-03-10 23:31:39,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:31:39,718 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:31:39,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:31:39,728 INFO L225 Difference]: With dead ends: 6380 [2021-03-10 23:31:39,728 INFO L226 Difference]: Without dead ends: 6332 [2021-03-10 23:31:39,728 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 14 SyntacticMatches, 4 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1361 ImplicationChecksByTransitivity, 11215.7ms TimeCoverageRelationStatistics Valid=664, Invalid=4028, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:31:39,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6332 states. [2021-03-10 23:31:39,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6332 to 5236. [2021-03-10 23:31:39,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5236 states, 5235 states have (on average 2.5476599808978033) internal successors, (13337), 5235 states have internal predecessors, (13337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:39,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5236 states to 5236 states and 13337 transitions. [2021-03-10 23:31:39,801 INFO L78 Accepts]: Start accepts. Automaton has 5236 states and 13337 transitions. Word has length 30 [2021-03-10 23:31:39,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:31:39,801 INFO L480 AbstractCegarLoop]: Abstraction has 5236 states and 13337 transitions. [2021-03-10 23:31:39,801 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 1.8928571428571428) internal successors, (53), 27 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:39,802 INFO L276 IsEmpty]: Start isEmpty. Operand 5236 states and 13337 transitions. [2021-03-10 23:31:39,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:31:39,806 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:31:39,806 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:31:40,006 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable734,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:31:40,006 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:31:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:31:40,007 INFO L82 PathProgramCache]: Analyzing trace with hash 153819951, now seen corresponding path program 88 times [2021-03-10 23:31:40,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:31:40,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795334427] [2021-03-10 23:31:40,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:31:40,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:31:40,608 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:31:41,117 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:41,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795334427] [2021-03-10 23:31:41,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779238289] [2021-03-10 23:31:41,118 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:31:41,136 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:31:41,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:31:41,137 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:31:41,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:31:42,034 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,039 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,042 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,046 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,047 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:42,049 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,052 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,055 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,058 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,059 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:42,062 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:42,063 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:42,065 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:42,066 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:31:42,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:31:42,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:42,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:31:42,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:31:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:42,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:31:42,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 23:31:42,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434986443] [2021-03-10 23:31:42,190 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:31:42,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:31:42,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:31:42,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:31:42,190 INFO L87 Difference]: Start difference. First operand 5236 states and 13337 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:42,918 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 28 [2021-03-10 23:31:43,529 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:31:43,743 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-03-10 23:31:44,176 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 29 [2021-03-10 23:31:44,608 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 30 [2021-03-10 23:31:44,976 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-03-10 23:31:45,213 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-10 23:31:45,531 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 29 [2021-03-10 23:31:45,766 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 26 [2021-03-10 23:31:46,073 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 23:31:46,601 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-03-10 23:31:47,101 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:31:47,396 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 32 [2021-03-10 23:31:47,644 WARN L205 SmtUtils]: Spent 125.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 28 [2021-03-10 23:31:47,873 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-10 23:31:48,188 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2021-03-10 23:31:48,513 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:31:49,139 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 23:31:49,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:31:49,281 INFO L93 Difference]: Finished difference Result 5603 states and 14123 transitions. [2021-03-10 23:31:49,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-03-10 23:31:49,284 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:31:49,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:31:49,292 INFO L225 Difference]: With dead ends: 5603 [2021-03-10 23:31:49,293 INFO L226 Difference]: Without dead ends: 5543 [2021-03-10 23:31:49,293 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 6434.0ms TimeCoverageRelationStatistics Valid=373, Invalid=2177, Unknown=0, NotChecked=0, Total=2550 [2021-03-10 23:31:49,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5543 states. [2021-03-10 23:31:49,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5543 to 5207. [2021-03-10 23:31:49,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5207 states, 5206 states have (on average 2.5399538993469073) internal successors, (13223), 5206 states have internal predecessors, (13223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:49,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5207 states to 5207 states and 13223 transitions. [2021-03-10 23:31:49,344 INFO L78 Accepts]: Start accepts. Automaton has 5207 states and 13223 transitions. Word has length 30 [2021-03-10 23:31:49,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:31:49,344 INFO L480 AbstractCegarLoop]: Abstraction has 5207 states and 13223 transitions. [2021-03-10 23:31:49,344 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:49,344 INFO L276 IsEmpty]: Start isEmpty. Operand 5207 states and 13223 transitions. [2021-03-10 23:31:49,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-03-10 23:31:49,349 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:31:49,349 INFO L519 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:31:49,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable827,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:31:49,549 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:31:49,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:31:49,549 INFO L82 PathProgramCache]: Analyzing trace with hash -134828685, now seen corresponding path program 89 times [2021-03-10 23:31:49,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:31:49,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254842249] [2021-03-10 23:31:49,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:31:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:31:50,032 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 30 [2021-03-10 23:31:50,307 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:31:50,466 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:31:50,702 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 1 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:50,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254842249] [2021-03-10 23:31:50,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673884450] [2021-03-10 23:31:50,703 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:31:50,722 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:31:50,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:31:50,723 WARN L261 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 35 conjunts are in the unsatisfiable core [2021-03-10 23:31:50,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:31:51,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,704 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,712 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,714 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:51,715 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:51,718 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:31:51,728 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:51,730 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:31:51,731 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 6 disjoint index pairs (out of 28 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 7 [2021-03-10 23:31:51,735 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:31:51,755 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:31:51,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:31:51,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:75, output treesize:7 [2021-03-10 23:31:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 32 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:31:51,858 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:31:51,858 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 12] total 23 [2021-03-10 23:31:51,858 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287801677] [2021-03-10 23:31:51,859 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:31:51,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:31:51,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:31:51,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=478, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:31:51,859 INFO L87 Difference]: Start difference. First operand 5207 states and 13223 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:31:52,569 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 24 [2021-03-10 23:31:53,167 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 31 [2021-03-10 23:31:53,373 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 26 [2021-03-10 23:31:53,791 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 36 [2021-03-10 23:31:54,236 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 23 [2021-03-10 23:31:54,833 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 39 [2021-03-10 23:31:55,385 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 42 [2021-03-10 23:31:55,951 WARN L205 SmtUtils]: Spent 270.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 37 [2021-03-10 23:31:56,535 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 32 [2021-03-10 23:31:56,878 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-03-10 23:31:57,226 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 46 [2021-03-10 23:31:58,255 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 44 [2021-03-10 23:31:58,560 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 32 [2021-03-10 23:31:59,005 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 38 [2021-03-10 23:31:59,243 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:31:59,588 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:32:00,051 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 23:32:00,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:00,178 INFO L93 Difference]: Finished difference Result 5675 states and 14287 transitions. [2021-03-10 23:32:00,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-03-10 23:32:00,182 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-03-10 23:32:00,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:00,191 INFO L225 Difference]: With dead ends: 5675 [2021-03-10 23:32:00,191 INFO L226 Difference]: Without dead ends: 5655 [2021-03-10 23:32:00,191 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 768 ImplicationChecksByTransitivity, 7715.6ms TimeCoverageRelationStatistics Valid=461, Invalid=2619, Unknown=0, NotChecked=0, Total=3080 [2021-03-10 23:32:00,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5655 states. [2021-03-10 23:32:00,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5655 to 5285. [2021-03-10 23:32:00,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5285 states, 5284 states have (on average 2.542013626040878) internal successors, (13432), 5284 states have internal predecessors, (13432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:00,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5285 states to 5285 states and 13432 transitions. [2021-03-10 23:32:00,248 INFO L78 Accepts]: Start accepts. Automaton has 5285 states and 13432 transitions. Word has length 30 [2021-03-10 23:32:00,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:00,248 INFO L480 AbstractCegarLoop]: Abstraction has 5285 states and 13432 transitions. [2021-03-10 23:32:00,248 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 23 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:00,248 INFO L276 IsEmpty]: Start isEmpty. Operand 5285 states and 13432 transitions. [2021-03-10 23:32:00,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:00,253 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:00,253 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:00,453 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:00,454 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:00,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:00,454 INFO L82 PathProgramCache]: Analyzing trace with hash -672367353, now seen corresponding path program 90 times [2021-03-10 23:32:00,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:00,454 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045146148] [2021-03-10 23:32:00,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:00,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:00,859 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:00,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045146148] [2021-03-10 23:32:00,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [607884251] [2021-03-10 23:32:00,859 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:00,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:32:00,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:00,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:00,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:02,005 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:02,006 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:02,006 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 23:32:02,006 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377729757] [2021-03-10 23:32:02,006 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:32:02,006 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:02,006 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:32:02,007 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:32:02,007 INFO L87 Difference]: Start difference. First operand 5285 states and 13432 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-03-10 23:32:06,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:06,520 INFO L93 Difference]: Finished difference Result 6329 states and 15636 transitions. [2021-03-10 23:32:06,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:32:06,523 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 32 [2021-03-10 23:32:06,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:06,549 INFO L225 Difference]: With dead ends: 6329 [2021-03-10 23:32:06,550 INFO L226 Difference]: Without dead ends: 6329 [2021-03-10 23:32:06,550 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1122 ImplicationChecksByTransitivity, 4199.8ms TimeCoverageRelationStatistics Valid=1225, Invalid=3467, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:32:06,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6329 states. [2021-03-10 23:32:06,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6329 to 5060. [2021-03-10 23:32:06,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5060 states, 5059 states have (on average 2.5408183435461553) internal successors, (12854), 5059 states have internal predecessors, (12854), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:06,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5060 states to 5060 states and 12854 transitions. [2021-03-10 23:32:06,600 INFO L78 Accepts]: Start accepts. Automaton has 5060 states and 12854 transitions. Word has length 32 [2021-03-10 23:32:06,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:06,600 INFO L480 AbstractCegarLoop]: Abstraction has 5060 states and 12854 transitions. [2021-03-10 23:32:06,600 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-03-10 23:32:06,600 INFO L276 IsEmpty]: Start isEmpty. Operand 5060 states and 12854 transitions. [2021-03-10 23:32:06,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:06,605 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:06,605 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:06,806 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable829 [2021-03-10 23:32:06,806 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:06,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:06,806 INFO L82 PathProgramCache]: Analyzing trace with hash 1632455975, now seen corresponding path program 91 times [2021-03-10 23:32:06,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:06,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [263520235] [2021-03-10 23:32:06,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:06,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:07,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:07,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [263520235] [2021-03-10 23:32:07,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624579441] [2021-03-10 23:32:07,136 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:07,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:07,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:07,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:08,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:08,119 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:08,119 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 23:32:08,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281326260] [2021-03-10 23:32:08,119 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:32:08,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:08,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:32:08,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=492, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:32:08,120 INFO L87 Difference]: Start difference. First operand 5060 states and 12854 transitions. Second operand has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:14,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:14,564 INFO L93 Difference]: Finished difference Result 8392 states and 20458 transitions. [2021-03-10 23:32:14,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-03-10 23:32:14,569 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 23:32:14,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:14,582 INFO L225 Difference]: With dead ends: 8392 [2021-03-10 23:32:14,582 INFO L226 Difference]: Without dead ends: 8288 [2021-03-10 23:32:14,583 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2357 ImplicationChecksByTransitivity, 6145.3ms TimeCoverageRelationStatistics Valid=1727, Invalid=5929, Unknown=0, NotChecked=0, Total=7656 [2021-03-10 23:32:14,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8288 states. [2021-03-10 23:32:14,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8288 to 5534. [2021-03-10 23:32:14,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5534 states, 5533 states have (on average 2.5555756370865716) internal successors, (14140), 5533 states have internal predecessors, (14140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5534 states to 5534 states and 14140 transitions. [2021-03-10 23:32:14,662 INFO L78 Accepts]: Start accepts. Automaton has 5534 states and 14140 transitions. Word has length 32 [2021-03-10 23:32:14,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:14,662 INFO L480 AbstractCegarLoop]: Abstraction has 5534 states and 14140 transitions. [2021-03-10 23:32:14,662 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 5534 states and 14140 transitions. [2021-03-10 23:32:14,667 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:14,667 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:14,667 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:14,867 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:14,867 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash 1308512999, now seen corresponding path program 92 times [2021-03-10 23:32:14,868 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:14,868 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074739585] [2021-03-10 23:32:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:15,135 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:15,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074739585] [2021-03-10 23:32:15,136 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795189709] [2021-03-10 23:32:15,136 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:15,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:32:15,162 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:15,163 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:15,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:16,111 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 25 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:16,112 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:16,112 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-03-10 23:32:16,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548641850] [2021-03-10 23:32:16,112 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:32:16,112 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:16,112 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:32:16,112 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:32:16,113 INFO L87 Difference]: Start difference. First operand 5534 states and 14140 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-03-10 23:32:21,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:21,751 INFO L93 Difference]: Finished difference Result 9933 states and 24855 transitions. [2021-03-10 23:32:21,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-03-10 23:32:21,755 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-03-10 23:32:21,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:21,771 INFO L225 Difference]: With dead ends: 9933 [2021-03-10 23:32:21,771 INFO L226 Difference]: Without dead ends: 9929 [2021-03-10 23:32:21,772 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1897 ImplicationChecksByTransitivity, 5133.8ms TimeCoverageRelationStatistics Valid=1604, Invalid=4248, Unknown=0, NotChecked=0, Total=5852 [2021-03-10 23:32:21,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9929 states. [2021-03-10 23:32:21,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9929 to 7205. [2021-03-10 23:32:21,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7205 states, 7204 states have (on average 2.56635202665186) internal successors, (18488), 7204 states have internal predecessors, (18488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7205 states to 7205 states and 18488 transitions. [2021-03-10 23:32:21,881 INFO L78 Accepts]: Start accepts. Automaton has 7205 states and 18488 transitions. Word has length 32 [2021-03-10 23:32:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:21,881 INFO L480 AbstractCegarLoop]: Abstraction has 7205 states and 18488 transitions. [2021-03-10 23:32:21,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-03-10 23:32:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 7205 states and 18488 transitions. [2021-03-10 23:32:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:21,887 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:21,887 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:22,087 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable831 [2021-03-10 23:32:22,088 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash 976834211, now seen corresponding path program 93 times [2021-03-10 23:32:22,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:22,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158294924] [2021-03-10 23:32:22,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:22,338 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:22,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158294924] [2021-03-10 23:32:22,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265537114] [2021-03-10 23:32:22,338 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:22,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 23:32:22,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:22,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:22,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:23,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:23,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-03-10 23:32:23,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918463776] [2021-03-10 23:32:23,354 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:32:23,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:23,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:32:23,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=319, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:32:23,355 INFO L87 Difference]: Start difference. First operand 7205 states and 18488 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-03-10 23:32:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:27,614 INFO L93 Difference]: Finished difference Result 7652 states and 19346 transitions. [2021-03-10 23:32:27,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:32:27,617 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-03-10 23:32:27,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:27,628 INFO L225 Difference]: With dead ends: 7652 [2021-03-10 23:32:27,628 INFO L226 Difference]: Without dead ends: 7648 [2021-03-10 23:32:27,629 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1296 ImplicationChecksByTransitivity, 4098.9ms TimeCoverageRelationStatistics Valid=1088, Invalid=3334, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:32:27,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7648 states. [2021-03-10 23:32:27,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7648 to 7144. [2021-03-10 23:32:27,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7144 states, 7143 states have (on average 2.5671286574268515) internal successors, (18337), 7143 states have internal predecessors, (18337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7144 states to 7144 states and 18337 transitions. [2021-03-10 23:32:27,705 INFO L78 Accepts]: Start accepts. Automaton has 7144 states and 18337 transitions. Word has length 32 [2021-03-10 23:32:27,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:27,705 INFO L480 AbstractCegarLoop]: Abstraction has 7144 states and 18337 transitions. [2021-03-10 23:32:27,705 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-03-10 23:32:27,705 INFO L276 IsEmpty]: Start isEmpty. Operand 7144 states and 18337 transitions. [2021-03-10 23:32:27,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:27,710 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:27,711 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:27,911 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable832,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:27,911 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:27,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:27,911 INFO L82 PathProgramCache]: Analyzing trace with hash 542563561, now seen corresponding path program 94 times [2021-03-10 23:32:27,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:27,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724123627] [2021-03-10 23:32:27,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:28,197 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 27 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:32:28,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724123627] [2021-03-10 23:32:28,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1759575346] [2021-03-10 23:32:28,198 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:28,216 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:32:28,216 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:28,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:28,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:29,080 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:29,080 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:29,080 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-03-10 23:32:29,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84307919] [2021-03-10 23:32:29,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:32:29,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:29,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:32:29,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:32:29,081 INFO L87 Difference]: Start difference. First operand 7144 states and 18337 transitions. Second operand has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:32,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:32,453 INFO L93 Difference]: Finished difference Result 9307 states and 23492 transitions. [2021-03-10 23:32:32,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:32:32,457 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-03-10 23:32:32,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:32,472 INFO L225 Difference]: With dead ends: 9307 [2021-03-10 23:32:32,472 INFO L226 Difference]: Without dead ends: 9295 [2021-03-10 23:32:32,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 813 ImplicationChecksByTransitivity, 3003.3ms TimeCoverageRelationStatistics Valid=721, Invalid=2249, Unknown=0, NotChecked=0, Total=2970 [2021-03-10 23:32:32,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9295 states. [2021-03-10 23:32:32,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9295 to 7390. [2021-03-10 23:32:32,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7390 states, 7389 states have (on average 2.5772093652727026) internal successors, (19043), 7389 states have internal predecessors, (19043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:32,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7390 states to 7390 states and 19043 transitions. [2021-03-10 23:32:32,591 INFO L78 Accepts]: Start accepts. Automaton has 7390 states and 19043 transitions. Word has length 32 [2021-03-10 23:32:32,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:32,591 INFO L480 AbstractCegarLoop]: Abstraction has 7390 states and 19043 transitions. [2021-03-10 23:32:32,591 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.619047619047619) internal successors, (55), 20 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:32,591 INFO L276 IsEmpty]: Start isEmpty. Operand 7390 states and 19043 transitions. [2021-03-10 23:32:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:32,596 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:32,596 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:32,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable833 [2021-03-10 23:32:32,799 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:32,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:32,800 INFO L82 PathProgramCache]: Analyzing trace with hash 987096583, now seen corresponding path program 95 times [2021-03-10 23:32:32,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:32,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827998974] [2021-03-10 23:32:32,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:33,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827998974] [2021-03-10 23:32:33,063 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311121903] [2021-03-10 23:32:33,063 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:33,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-03-10 23:32:33,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:33,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:33,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:34,010 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:34,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:34,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 23:32:34,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114395023] [2021-03-10 23:32:34,011 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:32:34,011 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:34,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:32:34,011 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:32:34,011 INFO L87 Difference]: Start difference. First operand 7390 states and 19043 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-03-10 23:32:38,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:38,485 INFO L93 Difference]: Finished difference Result 8545 states and 21523 transitions. [2021-03-10 23:32:38,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:32:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2021-03-10 23:32:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:38,501 INFO L225 Difference]: With dead ends: 8545 [2021-03-10 23:32:38,501 INFO L226 Difference]: Without dead ends: 8533 [2021-03-10 23:32:38,501 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1441 ImplicationChecksByTransitivity, 3955.2ms TimeCoverageRelationStatistics Valid=1130, Invalid=3562, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:32:38,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8533 states. [2021-03-10 23:32:38,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8533 to 7582. [2021-03-10 23:32:38,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7582 states, 7581 states have (on average 2.584619443345205) internal successors, (19594), 7581 states have internal predecessors, (19594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:38,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7582 states to 7582 states and 19594 transitions. [2021-03-10 23:32:38,584 INFO L78 Accepts]: Start accepts. Automaton has 7582 states and 19594 transitions. Word has length 32 [2021-03-10 23:32:38,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:38,584 INFO L480 AbstractCegarLoop]: Abstraction has 7582 states and 19594 transitions. [2021-03-10 23:32:38,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-03-10 23:32:38,584 INFO L276 IsEmpty]: Start isEmpty. Operand 7582 states and 19594 transitions. [2021-03-10 23:32:38,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:38,589 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:38,589 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:38,789 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable834 [2021-03-10 23:32:38,790 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:38,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1995895033, now seen corresponding path program 96 times [2021-03-10 23:32:38,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:38,790 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769960556] [2021-03-10 23:32:38,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:39,118 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:39,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769960556] [2021-03-10 23:32:39,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1851382988] [2021-03-10 23:32:39,119 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:39,144 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-03-10 23:32:39,145 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:39,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:39,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:40,090 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:40,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:40,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 23:32:40,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750478938] [2021-03-10 23:32:40,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:32:40,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:40,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:32:40,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:32:40,091 INFO L87 Difference]: Start difference. First operand 7582 states and 19594 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-03-10 23:32:44,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:44,575 INFO L93 Difference]: Finished difference Result 9120 states and 22905 transitions. [2021-03-10 23:32:44,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-03-10 23:32:44,579 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-03-10 23:32:44,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:44,593 INFO L225 Difference]: With dead ends: 9120 [2021-03-10 23:32:44,593 INFO L226 Difference]: Without dead ends: 9094 [2021-03-10 23:32:44,594 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1598 ImplicationChecksByTransitivity, 4168.6ms TimeCoverageRelationStatistics Valid=1183, Invalid=3787, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:32:44,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9094 states. [2021-03-10 23:32:44,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9094 to 7675. [2021-03-10 23:32:44,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7675 states, 7674 states have (on average 2.5901746155850924) internal successors, (19877), 7674 states have internal predecessors, (19877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:44,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7675 states to 7675 states and 19877 transitions. [2021-03-10 23:32:44,740 INFO L78 Accepts]: Start accepts. Automaton has 7675 states and 19877 transitions. Word has length 32 [2021-03-10 23:32:44,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:44,740 INFO L480 AbstractCegarLoop]: Abstraction has 7675 states and 19877 transitions. [2021-03-10 23:32:44,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-03-10 23:32:44,741 INFO L276 IsEmpty]: Start isEmpty. Operand 7675 states and 19877 transitions. [2021-03-10 23:32:44,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:44,747 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:44,747 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:44,948 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable835,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:44,948 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:44,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:44,949 INFO L82 PathProgramCache]: Analyzing trace with hash 387315719, now seen corresponding path program 97 times [2021-03-10 23:32:44,949 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:44,949 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972120457] [2021-03-10 23:32:44,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:44,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:45,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972120457] [2021-03-10 23:32:45,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689956578] [2021-03-10 23:32:45,308 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:45,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:45,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:45,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:46,533 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:46,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:46,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 23:32:46,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123886180] [2021-03-10 23:32:46,534 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:32:46,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:46,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:32:46,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:32:46,534 INFO L87 Difference]: Start difference. First operand 7675 states and 19877 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-03-10 23:32:51,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:51,600 INFO L93 Difference]: Finished difference Result 9477 states and 23788 transitions. [2021-03-10 23:32:51,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-03-10 23:32:51,604 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 32 [2021-03-10 23:32:51,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:51,619 INFO L225 Difference]: With dead ends: 9477 [2021-03-10 23:32:51,619 INFO L226 Difference]: Without dead ends: 9447 [2021-03-10 23:32:51,620 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1707 ImplicationChecksByTransitivity, 4978.0ms TimeCoverageRelationStatistics Valid=1246, Invalid=4010, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:32:51,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9447 states. [2021-03-10 23:32:51,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9447 to 7039. [2021-03-10 23:32:51,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7039 states, 7038 states have (on average 2.5869565217391304) internal successors, (18207), 7038 states have internal predecessors, (18207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:51,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7039 states to 7039 states and 18207 transitions. [2021-03-10 23:32:51,717 INFO L78 Accepts]: Start accepts. Automaton has 7039 states and 18207 transitions. Word has length 32 [2021-03-10 23:32:51,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:51,717 INFO L480 AbstractCegarLoop]: Abstraction has 7039 states and 18207 transitions. [2021-03-10 23:32:51,717 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-03-10 23:32:51,717 INFO L276 IsEmpty]: Start isEmpty. Operand 7039 states and 18207 transitions. [2021-03-10 23:32:51,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:51,723 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:51,723 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:51,923 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable836,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:51,923 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:51,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:51,923 INFO L82 PathProgramCache]: Analyzing trace with hash -1126651079, now seen corresponding path program 98 times [2021-03-10 23:32:51,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:51,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245227837] [2021-03-10 23:32:51,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:51,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:52,369 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:32:52,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245227837] [2021-03-10 23:32:52,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87876117] [2021-03-10 23:32:52,369 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:52,388 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:32:52,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:52,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:52,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:53,344 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:53,344 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:53,344 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 23:32:53,344 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646744367] [2021-03-10 23:32:53,345 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:32:53,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:53,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:32:53,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=491, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:32:53,345 INFO L87 Difference]: Start difference. First operand 7039 states and 18207 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-03-10 23:32:58,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:32:58,045 INFO L93 Difference]: Finished difference Result 8636 states and 21453 transitions. [2021-03-10 23:32:58,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:32:58,049 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 32 [2021-03-10 23:32:58,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:32:58,061 INFO L225 Difference]: With dead ends: 8636 [2021-03-10 23:32:58,061 INFO L226 Difference]: Without dead ends: 8636 [2021-03-10 23:32:58,062 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1328 ImplicationChecksByTransitivity, 4351.1ms TimeCoverageRelationStatistics Valid=1281, Invalid=3689, Unknown=0, NotChecked=0, Total=4970 [2021-03-10 23:32:58,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8636 states. [2021-03-10 23:32:58,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8636 to 6391. [2021-03-10 23:32:58,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6391 states, 6390 states have (on average 2.5741784037558686) internal successors, (16449), 6390 states have internal predecessors, (16449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:32:58,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6391 states to 6391 states and 16449 transitions. [2021-03-10 23:32:58,181 INFO L78 Accepts]: Start accepts. Automaton has 6391 states and 16449 transitions. Word has length 32 [2021-03-10 23:32:58,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:32:58,181 INFO L480 AbstractCegarLoop]: Abstraction has 6391 states and 16449 transitions. [2021-03-10 23:32:58,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-03-10 23:32:58,181 INFO L276 IsEmpty]: Start isEmpty. Operand 6391 states and 16449 transitions. [2021-03-10 23:32:58,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:32:58,185 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:32:58,185 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:32:58,385 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable837 [2021-03-10 23:32:58,385 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:32:58,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:32:58,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1001568577, now seen corresponding path program 99 times [2021-03-10 23:32:58,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:32:58,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659310330] [2021-03-10 23:32:58,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:32:58,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:32:58,713 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:32:58,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659310330] [2021-03-10 23:32:58,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [99076570] [2021-03-10 23:32:58,713 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:32:58,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-03-10 23:32:58,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:32:58,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:32:58,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:32:59,787 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:32:59,787 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:32:59,787 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 23:32:59,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911557471] [2021-03-10 23:32:59,787 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:32:59,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:32:59,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:32:59,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:32:59,788 INFO L87 Difference]: Start difference. First operand 6391 states and 16449 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-03-10 23:33:05,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:05,073 INFO L93 Difference]: Finished difference Result 7616 states and 18893 transitions. [2021-03-10 23:33:05,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-03-10 23:33:05,077 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 32 [2021-03-10 23:33:05,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:05,089 INFO L225 Difference]: With dead ends: 7616 [2021-03-10 23:33:05,089 INFO L226 Difference]: Without dead ends: 7550 [2021-03-10 23:33:05,089 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1720 ImplicationChecksByTransitivity, 4885.9ms TimeCoverageRelationStatistics Valid=1147, Invalid=4109, Unknown=0, NotChecked=0, Total=5256 [2021-03-10 23:33:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7550 states. [2021-03-10 23:33:05,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7550 to 6385. [2021-03-10 23:33:05,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6385 states, 6384 states have (on average 2.5731516290726817) internal successors, (16427), 6384 states have internal predecessors, (16427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:05,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6385 states to 6385 states and 16427 transitions. [2021-03-10 23:33:05,168 INFO L78 Accepts]: Start accepts. Automaton has 6385 states and 16427 transitions. Word has length 32 [2021-03-10 23:33:05,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:05,168 INFO L480 AbstractCegarLoop]: Abstraction has 6385 states and 16427 transitions. [2021-03-10 23:33:05,169 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-03-10 23:33:05,169 INFO L276 IsEmpty]: Start isEmpty. Operand 6385 states and 16427 transitions. [2021-03-10 23:33:05,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:05,173 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:05,173 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:05,374 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable838,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:05,374 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:05,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:05,374 INFO L82 PathProgramCache]: Analyzing trace with hash 2037690169, now seen corresponding path program 100 times [2021-03-10 23:33:05,374 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:05,374 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831300540] [2021-03-10 23:33:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:05,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:05,711 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:05,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831300540] [2021-03-10 23:33:05,712 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [506644047] [2021-03-10 23:33:05,712 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 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:05,730 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:33:05,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:05,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:05,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:06,667 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:06,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:06,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 23:33:06,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30186227] [2021-03-10 23:33:06,668 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:33:06,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:06,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:33:06,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=453, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:33:06,669 INFO L87 Difference]: Start difference. First operand 6385 states and 16427 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-03-10 23:33:11,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:11,459 INFO L93 Difference]: Finished difference Result 8396 states and 20751 transitions. [2021-03-10 23:33:11,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-03-10 23:33:11,462 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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 32 [2021-03-10 23:33:11,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:11,471 INFO L225 Difference]: With dead ends: 8396 [2021-03-10 23:33:11,471 INFO L226 Difference]: Without dead ends: 8396 [2021-03-10 23:33:11,472 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 4266.6ms TimeCoverageRelationStatistics Valid=1485, Invalid=4065, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 23:33:11,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8396 states. [2021-03-10 23:33:11,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8396 to 5791. [2021-03-10 23:33:11,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5791 states, 5790 states have (on average 2.550259067357513) internal successors, (14766), 5790 states have internal predecessors, (14766), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:11,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5791 states to 5791 states and 14766 transitions. [2021-03-10 23:33:11,577 INFO L78 Accepts]: Start accepts. Automaton has 5791 states and 14766 transitions. Word has length 32 [2021-03-10 23:33:11,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:11,577 INFO L480 AbstractCegarLoop]: Abstraction has 5791 states and 14766 transitions. [2021-03-10 23:33:11,577 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 23 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) [2021-03-10 23:33:11,577 INFO L276 IsEmpty]: Start isEmpty. Operand 5791 states and 14766 transitions. [2021-03-10 23:33:11,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:11,581 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:11,581 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:11,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable839,102 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:11,782 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:11,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:11,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1252561661, now seen corresponding path program 101 times [2021-03-10 23:33:11,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:11,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960542678] [2021-03-10 23:33:11,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:11,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 24 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:12,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960542678] [2021-03-10 23:33:12,037 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [975235338] [2021-03-10 23:33:12,037 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:12,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-03-10 23:33:12,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:12,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:12,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:12,956 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:12,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:12,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 23:33:12,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836300641] [2021-03-10 23:33:12,957 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:33:12,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:12,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:33:12,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:33:12,958 INFO L87 Difference]: Start difference. First operand 5791 states and 14766 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-03-10 23:33:17,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:17,487 INFO L93 Difference]: Finished difference Result 6671 states and 16517 transitions. [2021-03-10 23:33:17,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:33:17,490 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-03-10 23:33:17,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:17,498 INFO L225 Difference]: With dead ends: 6671 [2021-03-10 23:33:17,498 INFO L226 Difference]: Without dead ends: 6632 [2021-03-10 23:33:17,498 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1474 ImplicationChecksByTransitivity, 3899.5ms TimeCoverageRelationStatistics Valid=968, Invalid=3454, Unknown=0, NotChecked=0, Total=4422 [2021-03-10 23:33:17,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6632 states. [2021-03-10 23:33:17,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6632 to 5780. [2021-03-10 23:33:17,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5780 states, 5779 states have (on average 2.5478456480359926) internal successors, (14724), 5779 states have internal predecessors, (14724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:17,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5780 states to 5780 states and 14724 transitions. [2021-03-10 23:33:17,563 INFO L78 Accepts]: Start accepts. Automaton has 5780 states and 14724 transitions. Word has length 32 [2021-03-10 23:33:17,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:17,563 INFO L480 AbstractCegarLoop]: Abstraction has 5780 states and 14724 transitions. [2021-03-10 23:33:17,563 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-03-10 23:33:17,563 INFO L276 IsEmpty]: Start isEmpty. Operand 5780 states and 14724 transitions. [2021-03-10 23:33:17,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:17,567 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:17,567 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:17,768 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-03-10 23:33:17,768 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:17,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:17,768 INFO L82 PathProgramCache]: Analyzing trace with hash -180243655, now seen corresponding path program 102 times [2021-03-10 23:33:17,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:17,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298706170] [2021-03-10 23:33:17,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:17,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:18,033 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 27 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:18,033 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298706170] [2021-03-10 23:33:18,034 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815607687] [2021-03-10 23:33:18,034 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:18,052 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:33:18,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:18,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:18,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:18,884 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:18,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:18,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 23:33:18,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1572303217] [2021-03-10 23:33:18,885 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:33:18,885 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:18,885 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:33:18,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:33:18,886 INFO L87 Difference]: Start difference. First operand 5780 states and 14724 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-03-10 23:33:24,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:24,338 INFO L93 Difference]: Finished difference Result 8415 states and 20738 transitions. [2021-03-10 23:33:24,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-03-10 23:33:24,341 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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 32 [2021-03-10 23:33:24,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:24,351 INFO L225 Difference]: With dead ends: 8415 [2021-03-10 23:33:24,351 INFO L226 Difference]: Without dead ends: 8415 [2021-03-10 23:33:24,351 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2166 ImplicationChecksByTransitivity, 4809.9ms TimeCoverageRelationStatistics Valid=1768, Invalid=4552, Unknown=0, NotChecked=0, Total=6320 [2021-03-10 23:33:24,356 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8415 states. [2021-03-10 23:33:24,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8415 to 6427. [2021-03-10 23:33:24,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6427 states, 6426 states have (on average 2.5351696234049177) internal successors, (16291), 6426 states have internal predecessors, (16291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:24,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6427 states to 6427 states and 16291 transitions. [2021-03-10 23:33:24,427 INFO L78 Accepts]: Start accepts. Automaton has 6427 states and 16291 transitions. Word has length 32 [2021-03-10 23:33:24,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:24,427 INFO L480 AbstractCegarLoop]: Abstraction has 6427 states and 16291 transitions. [2021-03-10 23:33:24,427 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 22 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) [2021-03-10 23:33:24,427 INFO L276 IsEmpty]: Start isEmpty. Operand 6427 states and 16291 transitions. [2021-03-10 23:33:24,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:24,431 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:24,431 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:24,640 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable841 [2021-03-10 23:33:24,640 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:24,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:24,640 INFO L82 PathProgramCache]: Analyzing trace with hash 729918393, now seen corresponding path program 103 times [2021-03-10 23:33:24,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:24,640 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344298296] [2021-03-10 23:33:24,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:24,884 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 22 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:24,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344298296] [2021-03-10 23:33:24,884 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1195337037] [2021-03-10 23:33:24,884 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:24,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:24,902 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:24,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:25,737 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 16 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:25,737 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:25,737 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 23:33:25,737 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805699054] [2021-03-10 23:33:25,737 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:33:25,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:25,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:33:25,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:33:25,738 INFO L87 Difference]: Start difference. First operand 6427 states and 16291 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-03-10 23:33:29,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:29,659 INFO L93 Difference]: Finished difference Result 7248 states and 18012 transitions. [2021-03-10 23:33:29,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-03-10 23:33:29,662 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2021-03-10 23:33:29,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:29,671 INFO L225 Difference]: With dead ends: 7248 [2021-03-10 23:33:29,671 INFO L226 Difference]: Without dead ends: 7230 [2021-03-10 23:33:29,671 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 3351.2ms TimeCoverageRelationStatistics Valid=879, Invalid=3027, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:33:29,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7230 states. [2021-03-10 23:33:29,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7230 to 6476. [2021-03-10 23:33:29,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6476 states, 6475 states have (on average 2.532046332046332) internal successors, (16395), 6475 states have internal predecessors, (16395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:29,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6476 states to 6476 states and 16395 transitions. [2021-03-10 23:33:29,739 INFO L78 Accepts]: Start accepts. Automaton has 6476 states and 16395 transitions. Word has length 32 [2021-03-10 23:33:29,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:29,740 INFO L480 AbstractCegarLoop]: Abstraction has 6476 states and 16395 transitions. [2021-03-10 23:33:29,740 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-03-10 23:33:29,740 INFO L276 IsEmpty]: Start isEmpty. Operand 6476 states and 16395 transitions. [2021-03-10 23:33:29,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:29,744 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:29,744 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:29,944 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable842 [2021-03-10 23:33:29,944 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:29,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:29,945 INFO L82 PathProgramCache]: Analyzing trace with hash -853693707, now seen corresponding path program 104 times [2021-03-10 23:33:29,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:29,945 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66515887] [2021-03-10 23:33:29,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:30,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66515887] [2021-03-10 23:33:30,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213133077] [2021-03-10 23:33:30,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:30,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:33:30,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:30,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:31,069 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 29 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:31,069 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:31,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 23:33:31,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431852525] [2021-03-10 23:33:31,070 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:33:31,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:31,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:33:31,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:33:31,070 INFO L87 Difference]: Start difference. First operand 6476 states and 16395 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:36,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:36,536 INFO L93 Difference]: Finished difference Result 10979 states and 27716 transitions. [2021-03-10 23:33:36,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 23:33:36,539 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 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 32 [2021-03-10 23:33:36,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:36,552 INFO L225 Difference]: With dead ends: 10979 [2021-03-10 23:33:36,552 INFO L226 Difference]: Without dead ends: 10979 [2021-03-10 23:33:36,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2550 ImplicationChecksByTransitivity, 4917.8ms TimeCoverageRelationStatistics Valid=2010, Invalid=4962, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:33:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10979 states. [2021-03-10 23:33:36,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10979 to 9735. [2021-03-10 23:33:36,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9735 states, 9734 states have (on average 2.579206903636737) internal successors, (25106), 9734 states have internal predecessors, (25106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:36,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9735 states to 9735 states and 25106 transitions. [2021-03-10 23:33:36,698 INFO L78 Accepts]: Start accepts. Automaton has 9735 states and 25106 transitions. Word has length 32 [2021-03-10 23:33:36,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:36,699 INFO L480 AbstractCegarLoop]: Abstraction has 9735 states and 25106 transitions. [2021-03-10 23:33:36,699 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:36,699 INFO L276 IsEmpty]: Start isEmpty. Operand 9735 states and 25106 transitions. [2021-03-10 23:33:36,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:36,705 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:36,705 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:36,905 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable843 [2021-03-10 23:33:36,906 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:36,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:36,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1689192365, now seen corresponding path program 105 times [2021-03-10 23:33:36,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:36,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902555793] [2021-03-10 23:33:36,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:36,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:37,128 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 19 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:37,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902555793] [2021-03-10 23:33:37,128 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015322431] [2021-03-10 23:33:37,128 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:37,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:33:37,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:37,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:37,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:37,963 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 18 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:37,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:37,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 13] total 20 [2021-03-10 23:33:37,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168572234] [2021-03-10 23:33:37,964 INFO L460 AbstractCegarLoop]: Interpolant automaton has 21 states [2021-03-10 23:33:37,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:37,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-03-10 23:33:37,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-03-10 23:33:37,964 INFO L87 Difference]: Start difference. First operand 9735 states and 25106 transitions. Second operand has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-03-10 23:33:41,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:41,535 INFO L93 Difference]: Finished difference Result 10789 states and 27252 transitions. [2021-03-10 23:33:41,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:33:41,538 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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 32 [2021-03-10 23:33:41,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:41,552 INFO L225 Difference]: With dead ends: 10789 [2021-03-10 23:33:41,552 INFO L226 Difference]: Without dead ends: 10785 [2021-03-10 23:33:41,553 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1210 ImplicationChecksByTransitivity, 3213.7ms TimeCoverageRelationStatistics Valid=1087, Invalid=2819, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:33:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10785 states. [2021-03-10 23:33:41,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10785 to 9614. [2021-03-10 23:33:41,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9614 states, 9613 states have (on average 2.576719026318527) internal successors, (24770), 9613 states have internal predecessors, (24770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:41,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9614 states to 9614 states and 24770 transitions. [2021-03-10 23:33:41,666 INFO L78 Accepts]: Start accepts. Automaton has 9614 states and 24770 transitions. Word has length 32 [2021-03-10 23:33:41,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:41,666 INFO L480 AbstractCegarLoop]: Abstraction has 9614 states and 24770 transitions. [2021-03-10 23:33:41,666 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 21 states, 21 states have (on average 2.5714285714285716) internal successors, (54), 20 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) [2021-03-10 23:33:41,666 INFO L276 IsEmpty]: Start isEmpty. Operand 9614 states and 24770 transitions. [2021-03-10 23:33:41,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:41,673 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:41,673 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:41,873 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable844,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:41,874 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:41,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:41,874 INFO L82 PathProgramCache]: Analyzing trace with hash 1182846099, now seen corresponding path program 106 times [2021-03-10 23:33:41,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:41,874 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933708161] [2021-03-10 23:33:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:41,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:42,142 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 17 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:42,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933708161] [2021-03-10 23:33:42,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [516278895] [2021-03-10 23:33:42,143 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:42,160 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:33:42,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:42,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:42,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:43,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:43,033 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 13] total 21 [2021-03-10 23:33:43,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613123262] [2021-03-10 23:33:43,034 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-03-10 23:33:43,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:43,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-03-10 23:33:43,034 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2021-03-10 23:33:43,034 INFO L87 Difference]: Start difference. First operand 9614 states and 24770 transitions. Second operand has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-03-10 23:33:46,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:46,707 INFO L93 Difference]: Finished difference Result 11191 states and 28291 transitions. [2021-03-10 23:33:46,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:33:46,711 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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 32 [2021-03-10 23:33:46,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:46,730 INFO L225 Difference]: With dead ends: 11191 [2021-03-10 23:33:46,730 INFO L226 Difference]: Without dead ends: 11179 [2021-03-10 23:33:46,731 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1201 ImplicationChecksByTransitivity, 3283.6ms TimeCoverageRelationStatistics Valid=1011, Invalid=2895, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:33:46,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11179 states. [2021-03-10 23:33:46,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11179 to 9785. [2021-03-10 23:33:46,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9785 states, 9784 states have (on average 2.581152902698283) internal successors, (25254), 9784 states have internal predecessors, (25254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:46,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9785 states to 9785 states and 25254 transitions. [2021-03-10 23:33:46,877 INFO L78 Accepts]: Start accepts. Automaton has 9785 states and 25254 transitions. Word has length 32 [2021-03-10 23:33:46,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:46,877 INFO L480 AbstractCegarLoop]: Abstraction has 9785 states and 25254 transitions. [2021-03-10 23:33:46,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.4545454545454546) internal successors, (54), 21 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) [2021-03-10 23:33:46,878 INFO L276 IsEmpty]: Start isEmpty. Operand 9785 states and 25254 transitions. [2021-03-10 23:33:46,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:46,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:46,937 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:47,138 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable845,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:47,138 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:47,138 INFO L82 PathProgramCache]: Analyzing trace with hash 955624719, now seen corresponding path program 107 times [2021-03-10 23:33:47,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:47,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684988557] [2021-03-10 23:33:47,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:47,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:47,426 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 26 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:47,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684988557] [2021-03-10 23:33:47,427 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142935485] [2021-03-10 23:33:47,427 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:47,446 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:33:47,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:47,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:47,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:48,337 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 13 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:48,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:48,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 22 [2021-03-10 23:33:48,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041531448] [2021-03-10 23:33:48,338 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-03-10 23:33:48,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:48,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-03-10 23:33:48,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=413, Unknown=0, NotChecked=0, Total=506 [2021-03-10 23:33:48,338 INFO L87 Difference]: Start difference. First operand 9785 states and 25254 transitions. Second operand has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-03-10 23:33:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:52,500 INFO L93 Difference]: Finished difference Result 12038 states and 30432 transitions. [2021-03-10 23:33:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:33:52,503 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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 32 [2021-03-10 23:33:52,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:52,517 INFO L225 Difference]: With dead ends: 12038 [2021-03-10 23:33:52,517 INFO L226 Difference]: Without dead ends: 12018 [2021-03-10 23:33:52,518 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 3635.2ms TimeCoverageRelationStatistics Valid=1025, Invalid=3135, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:33:52,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12018 states. [2021-03-10 23:33:52,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12018 to 10809. [2021-03-10 23:33:52,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10809 states, 10808 states have (on average 2.588823094004441) internal successors, (27980), 10808 states have internal predecessors, (27980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:52,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10809 states to 10809 states and 27980 transitions. [2021-03-10 23:33:52,661 INFO L78 Accepts]: Start accepts. Automaton has 10809 states and 27980 transitions. Word has length 32 [2021-03-10 23:33:52,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:52,661 INFO L480 AbstractCegarLoop]: Abstraction has 10809 states and 27980 transitions. [2021-03-10 23:33:52,661 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.347826086956522) internal successors, (54), 22 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) [2021-03-10 23:33:52,661 INFO L276 IsEmpty]: Start isEmpty. Operand 10809 states and 27980 transitions. [2021-03-10 23:33:52,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:52,669 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:52,669 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:52,869 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:52,869 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:52,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:52,869 INFO L82 PathProgramCache]: Analyzing trace with hash 1639210635, now seen corresponding path program 108 times [2021-03-10 23:33:52,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:52,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64497989] [2021-03-10 23:33:52,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:52,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:53,226 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 25 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:33:53,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64497989] [2021-03-10 23:33:53,226 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3571044] [2021-03-10 23:33:53,226 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:53,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:33:53,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:33:53,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:53,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:33:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 15 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:54,307 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:33:54,307 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-03-10 23:33:54,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498576941] [2021-03-10 23:33:54,307 INFO L460 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-03-10 23:33:54,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:33:54,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-03-10 23:33:54,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2021-03-10 23:33:54,307 INFO L87 Difference]: Start difference. First operand 10809 states and 27980 transitions. Second operand has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-03-10 23:33:58,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:33:58,730 INFO L93 Difference]: Finished difference Result 13469 states and 34114 transitions. [2021-03-10 23:33:58,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:33:58,734 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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 32 [2021-03-10 23:33:58,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:33:58,751 INFO L225 Difference]: With dead ends: 13469 [2021-03-10 23:33:58,751 INFO L226 Difference]: Without dead ends: 13441 [2021-03-10 23:33:58,752 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1459 ImplicationChecksByTransitivity, 4358.8ms TimeCoverageRelationStatistics Valid=1128, Invalid=3564, Unknown=0, NotChecked=0, Total=4692 [2021-03-10 23:33:58,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13441 states. [2021-03-10 23:33:58,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13441 to 12135. [2021-03-10 23:33:58,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12135 states, 12134 states have (on average 2.5943629470908194) internal successors, (31480), 12134 states have internal predecessors, (31480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:33:58,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12135 states to 12135 states and 31480 transitions. [2021-03-10 23:33:58,953 INFO L78 Accepts]: Start accepts. Automaton has 12135 states and 31480 transitions. Word has length 32 [2021-03-10 23:33:58,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:33:58,953 INFO L480 AbstractCegarLoop]: Abstraction has 12135 states and 31480 transitions. [2021-03-10 23:33:58,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.25) internal successors, (54), 23 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) [2021-03-10 23:33:58,953 INFO L276 IsEmpty]: Start isEmpty. Operand 12135 states and 31480 transitions. [2021-03-10 23:33:58,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-03-10 23:33:58,962 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:33:58,963 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:33:59,164 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable847 [2021-03-10 23:33:59,165 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:33:59,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:33:59,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1435279623, now seen corresponding path program 109 times [2021-03-10 23:33:59,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:33:59,165 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927782200] [2021-03-10 23:33:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:33:59,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:59,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:33:59,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927782200] [2021-03-10 23:33:59,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323076332] [2021-03-10 23:33:59,580 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:33:59,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:33:59,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 13 conjunts are in the unsatisfiable core [2021-03-10 23:33:59,600 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:34:00,801 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 21 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:00,802 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:34:00,802 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-03-10 23:34:00,802 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980584310] [2021-03-10 23:34:00,802 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:34:00,802 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:34:00,802 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:34:00,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=483, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:34:00,802 INFO L87 Difference]: Start difference. First operand 12135 states and 31480 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-03-10 23:34:06,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:34:06,207 INFO L93 Difference]: Finished difference Result 13714 states and 34911 transitions. [2021-03-10 23:34:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-03-10 23:34:06,211 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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 32 [2021-03-10 23:34:06,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:34:06,232 INFO L225 Difference]: With dead ends: 13714 [2021-03-10 23:34:06,232 INFO L226 Difference]: Without dead ends: 13678 [2021-03-10 23:34:06,233 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1785 ImplicationChecksByTransitivity, 5329.4ms TimeCoverageRelationStatistics Valid=1318, Invalid=4232, Unknown=0, NotChecked=0, Total=5550 [2021-03-10 23:34:06,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13678 states. [2021-03-10 23:34:06,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13678 to 12498. [2021-03-10 23:34:06,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12498 states, 12497 states have (on average 2.5989437464991596) internal successors, (32479), 12497 states have internal predecessors, (32479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12498 states to 12498 states and 32479 transitions. [2021-03-10 23:34:06,483 INFO L78 Accepts]: Start accepts. Automaton has 12498 states and 32479 transitions. Word has length 32 [2021-03-10 23:34:06,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:34:06,483 INFO L480 AbstractCegarLoop]: Abstraction has 12498 states and 32479 transitions. [2021-03-10 23:34:06,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 24 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) [2021-03-10 23:34:06,483 INFO L276 IsEmpty]: Start isEmpty. Operand 12498 states and 32479 transitions. [2021-03-10 23:34:06,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:34:06,494 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:34:06,494 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:34:06,694 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable848,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:06,694 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:34:06,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:34:06,695 INFO L82 PathProgramCache]: Analyzing trace with hash 1812733093, now seen corresponding path program 110 times [2021-03-10 23:34:06,695 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:34:06,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694553753] [2021-03-10 23:34:06,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:34:06,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:34:07,398 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:34:07,892 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:34:08,351 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:08,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694553753] [2021-03-10 23:34:08,352 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620388848] [2021-03-10 23:34:08,352 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:08,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:34:08,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:34:08,373 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:34:08,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:34:10,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,210 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,213 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,217 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,220 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,224 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,227 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,229 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:10,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,233 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:10,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,239 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,241 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:10,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,249 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,250 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:10,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:10,256 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:10,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:34:10,262 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:34:10,285 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:10,290 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:34:10,290 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:34:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:10,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:34:10,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-03-10 23:34:10,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018639717] [2021-03-10 23:34:10,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:34:10,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:34:10,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:34:10,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:34:10,398 INFO L87 Difference]: Start difference. First operand 12498 states and 32479 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:11,214 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:34:11,485 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:34:11,924 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-10 23:34:12,480 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:34:12,760 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:34:13,105 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-03-10 23:34:13,578 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2021-03-10 23:34:14,142 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-03-10 23:34:14,767 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 50 [2021-03-10 23:34:15,450 WARN L205 SmtUtils]: Spent 256.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 54 [2021-03-10 23:34:15,784 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:34:16,330 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:34:16,904 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 48 [2021-03-10 23:34:17,285 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 51 [2021-03-10 23:34:17,858 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 38 [2021-03-10 23:34:18,202 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:34:19,231 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 51 [2021-03-10 23:34:19,870 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-03-10 23:34:20,280 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:34:20,508 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:34:21,195 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-10 23:34:21,537 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:34:22,236 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:34:22,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:34:22,874 INFO L93 Difference]: Finished difference Result 15578 states and 39720 transitions. [2021-03-10 23:34:22,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:34:22,879 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:34:22,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:34:22,900 INFO L225 Difference]: With dead ends: 15578 [2021-03-10 23:34:22,900 INFO L226 Difference]: Without dead ends: 15571 [2021-03-10 23:34:22,900 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 998 ImplicationChecksByTransitivity, 11196.7ms TimeCoverageRelationStatistics Valid=616, Invalid=3674, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:34:22,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15571 states. [2021-03-10 23:34:23,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15571 to 12680. [2021-03-10 23:34:23,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12680 states, 12679 states have (on average 2.598785393169808) internal successors, (32950), 12679 states have internal predecessors, (32950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:23,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12680 states to 12680 states and 32950 transitions. [2021-03-10 23:34:23,071 INFO L78 Accepts]: Start accepts. Automaton has 12680 states and 32950 transitions. Word has length 34 [2021-03-10 23:34:23,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:34:23,071 INFO L480 AbstractCegarLoop]: Abstraction has 12680 states and 32950 transitions. [2021-03-10 23:34:23,071 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:23,071 INFO L276 IsEmpty]: Start isEmpty. Operand 12680 states and 32950 transitions. [2021-03-10 23:34:23,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:34:23,081 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:34:23,081 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:34:23,282 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable849,112 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:23,282 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:34:23,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:34:23,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1087321293, now seen corresponding path program 111 times [2021-03-10 23:34:23,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:34:23,283 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153053307] [2021-03-10 23:34:23,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:34:23,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:34:23,839 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:34:24,006 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:34:24,175 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:34:24,977 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:24,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153053307] [2021-03-10 23:34:24,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047274365] [2021-03-10 23:34:24,978 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:24,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:34:24,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:34:24,999 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:34:24,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:34:28,172 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:28,253 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:28,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:28,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:28,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:28,285 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:28,296 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:28,306 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:28,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:28,324 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:28,324 INFO L244 Elim1Store]: Index analysis took 155 ms [2021-03-10 23:34:28,712 WARN L205 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 77 [2021-03-10 23:34:28,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:28,713 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 27 case distinctions, treesize of input 85 treesize of output 171 [2021-03-10 23:34:30,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 5 xjuncts. [2021-03-10 23:34:31,563 WARN L205 SmtUtils]: Spent 956.00 ms on a formula simplification. DAG size of input: 185 DAG size of output: 24 [2021-03-10 23:34:31,565 INFO L628 ElimStorePlain]: treesize reduction 2048, result has 1.7 percent of original size [2021-03-10 23:34:31,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:34:31,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:107, output treesize:22 [2021-03-10 23:34:31,879 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:31,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:34:31,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-03-10 23:34:31,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756720391] [2021-03-10 23:34:31,879 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:34:31,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:34:31,880 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:34:31,880 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:34:31,880 INFO L87 Difference]: Start difference. First operand 12680 states and 32950 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:32,284 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:34:33,439 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 25 [2021-03-10 23:34:34,322 WARN L205 SmtUtils]: Spent 241.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 44 [2021-03-10 23:34:34,773 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 15 [2021-03-10 23:34:35,114 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 36 [2021-03-10 23:34:35,668 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 46 [2021-03-10 23:34:36,192 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-03-10 23:34:36,821 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2021-03-10 23:34:37,878 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:34:38,280 WARN L205 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:34:38,512 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:34:38,818 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 35 [2021-03-10 23:34:39,130 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:34:39,789 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 66 DAG size of output: 53 [2021-03-10 23:34:40,078 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:34:40,562 WARN L205 SmtUtils]: Spent 273.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 59 [2021-03-10 23:34:41,365 WARN L205 SmtUtils]: Spent 522.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 57 [2021-03-10 23:34:42,655 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 53 [2021-03-10 23:34:43,345 WARN L205 SmtUtils]: Spent 225.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 49 [2021-03-10 23:34:44,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:34:44,197 INFO L93 Difference]: Finished difference Result 15454 states and 39465 transitions. [2021-03-10 23:34:44,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:34:44,202 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:34:44,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:34:44,224 INFO L225 Difference]: With dead ends: 15454 [2021-03-10 23:34:44,224 INFO L226 Difference]: Without dead ends: 15384 [2021-03-10 23:34:44,224 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 11396.1ms TimeCoverageRelationStatistics Valid=525, Invalid=3257, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:34:44,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15384 states. [2021-03-10 23:34:44,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15384 to 12675. [2021-03-10 23:34:44,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12675 states, 12674 states have (on average 2.5986271106201673) internal successors, (32935), 12674 states have internal predecessors, (32935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:44,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12675 states to 12675 states and 32935 transitions. [2021-03-10 23:34:44,408 INFO L78 Accepts]: Start accepts. Automaton has 12675 states and 32935 transitions. Word has length 34 [2021-03-10 23:34:44,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:34:44,408 INFO L480 AbstractCegarLoop]: Abstraction has 12675 states and 32935 transitions. [2021-03-10 23:34:44,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:44,408 INFO L276 IsEmpty]: Start isEmpty. Operand 12675 states and 32935 transitions. [2021-03-10 23:34:44,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:34:44,419 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:34:44,419 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:34:44,619 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-03-10 23:34:44,619 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:34:44,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:34:44,620 INFO L82 PathProgramCache]: Analyzing trace with hash -44039697, now seen corresponding path program 112 times [2021-03-10 23:34:44,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:34:44,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251870773] [2021-03-10 23:34:44,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:34:44,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:34:45,413 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:34:45,603 WARN L205 SmtUtils]: Spent 128.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:34:45,812 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 23:34:46,041 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 26 [2021-03-10 23:34:46,233 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:34:46,415 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:34:46,722 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:46,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251870773] [2021-03-10 23:34:46,723 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706587262] [2021-03-10 23:34:46,723 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:34:46,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:34:46,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:34:46,744 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:34:46,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:34:48,644 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,650 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,658 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,659 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:48,663 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,666 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,669 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,674 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:48,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,681 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,682 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:48,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,687 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:48,690 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:34:48,692 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:34:48,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:34:48,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:34:48,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:34:48,726 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:34:48,726 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:34:48,856 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:34:48,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:34:48,856 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-03-10 23:34:48,856 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007271400] [2021-03-10 23:34:48,856 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:34:48,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:34:48,857 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:34:48,857 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=712, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:34:48,857 INFO L87 Difference]: Start difference. First operand 12675 states and 32935 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:34:49,458 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:34:49,820 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:34:50,158 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 22 [2021-03-10 23:34:50,666 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-03-10 23:34:51,279 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 29 [2021-03-10 23:34:51,689 WARN L205 SmtUtils]: Spent 231.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:34:52,071 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-10 23:34:52,655 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 33 [2021-03-10 23:34:53,390 WARN L205 SmtUtils]: Spent 292.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-03-10 23:34:53,719 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:34:54,026 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-10 23:34:54,420 WARN L205 SmtUtils]: Spent 191.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:34:54,940 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:34:55,361 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 27 [2021-03-10 23:34:55,592 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:34:56,099 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-03-10 23:34:56,496 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:34:56,809 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-03-10 23:34:57,103 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 30 [2021-03-10 23:34:57,458 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 23:34:57,828 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-10 23:34:58,472 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 41 [2021-03-10 23:34:58,946 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 45 [2021-03-10 23:34:59,361 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:34:59,785 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-10 23:35:00,134 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-03-10 23:35:00,858 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:35:01,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:35:01,480 INFO L93 Difference]: Finished difference Result 15621 states and 39863 transitions. [2021-03-10 23:35:01,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:35:01,484 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:35:01,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:35:01,506 INFO L225 Difference]: With dead ends: 15621 [2021-03-10 23:35:01,506 INFO L226 Difference]: Without dead ends: 15570 [2021-03-10 23:35:01,506 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 877 ImplicationChecksByTransitivity, 11599.2ms TimeCoverageRelationStatistics Valid=549, Invalid=3233, Unknown=0, NotChecked=0, Total=3782 [2021-03-10 23:35:01,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15570 states. [2021-03-10 23:35:01,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15570 to 12775. [2021-03-10 23:35:01,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12775 states, 12774 states have (on average 2.5945670894003445) internal successors, (33143), 12774 states have internal predecessors, (33143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:01,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12775 states to 12775 states and 33143 transitions. [2021-03-10 23:35:01,690 INFO L78 Accepts]: Start accepts. Automaton has 12775 states and 33143 transitions. Word has length 34 [2021-03-10 23:35:01,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:35:01,690 INFO L480 AbstractCegarLoop]: Abstraction has 12775 states and 33143 transitions. [2021-03-10 23:35:01,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:01,691 INFO L276 IsEmpty]: Start isEmpty. Operand 12775 states and 33143 transitions. [2021-03-10 23:35:01,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:35:01,702 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:35:01,702 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:35:01,902 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1149 [2021-03-10 23:35:01,902 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:35:01,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:35:01,903 INFO L82 PathProgramCache]: Analyzing trace with hash 1445312427, now seen corresponding path program 113 times [2021-03-10 23:35:01,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:35:01,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309290170] [2021-03-10 23:35:01,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:35:01,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:35:02,702 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:35:02,904 WARN L205 SmtUtils]: Spent 133.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:35:03,131 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 23:35:03,496 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:35:03,701 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:35:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:04,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309290170] [2021-03-10 23:35:04,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1457056225] [2021-03-10 23:35:04,081 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:35:04,108 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:35:04,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:35:04,109 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:35:04,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:35:06,270 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,286 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,290 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,294 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,298 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,300 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:06,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,312 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,316 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,321 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:06,325 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,330 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,334 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,337 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,339 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:06,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:06,345 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:06,347 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:06,349 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:35:06,355 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:35:06,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:06,390 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:35:06,391 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:35:06,518 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:06,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:35:06,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14] total 28 [2021-03-10 23:35:06,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924211023] [2021-03-10 23:35:06,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:35:06,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:35:06,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:35:06,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=711, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:35:06,519 INFO L87 Difference]: Start difference. First operand 12775 states and 33143 transitions. Second operand has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:07,106 WARN L205 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:35:07,449 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:35:07,876 WARN L205 SmtUtils]: Spent 189.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-10 23:35:08,204 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:35:08,698 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-03-10 23:35:09,233 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-03-10 23:35:09,676 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-10 23:35:10,291 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 30 [2021-03-10 23:35:10,654 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:35:11,084 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 30 [2021-03-10 23:35:11,489 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:35:11,872 WARN L205 SmtUtils]: Spent 172.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-10 23:35:12,344 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:35:12,741 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:35:13,172 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 27 [2021-03-10 23:35:13,468 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-03-10 23:35:14,025 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-03-10 23:35:14,451 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:35:14,789 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-10 23:35:15,092 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:35:15,480 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 23:35:15,770 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:35:16,204 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-10 23:35:16,687 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-03-10 23:35:17,208 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 23:35:17,642 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:35:18,088 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 43 [2021-03-10 23:35:18,536 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 47 [2021-03-10 23:35:19,273 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:35:19,672 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 47 [2021-03-10 23:35:20,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:35:20,413 INFO L93 Difference]: Finished difference Result 16093 states and 40937 transitions. [2021-03-10 23:35:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-03-10 23:35:20,418 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:35:20,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:35:20,440 INFO L225 Difference]: With dead ends: 16093 [2021-03-10 23:35:20,440 INFO L226 Difference]: Without dead ends: 16045 [2021-03-10 23:35:20,441 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 12784.9ms TimeCoverageRelationStatistics Valid=552, Invalid=3354, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:35:20,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16045 states. [2021-03-10 23:35:20,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16045 to 12969. [2021-03-10 23:35:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12969 states, 12968 states have (on average 2.5905305367057374) internal successors, (33594), 12968 states have internal predecessors, (33594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:20,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12969 states to 12969 states and 33594 transitions. [2021-03-10 23:35:20,620 INFO L78 Accepts]: Start accepts. Automaton has 12969 states and 33594 transitions. Word has length 34 [2021-03-10 23:35:20,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:35:20,620 INFO L480 AbstractCegarLoop]: Abstraction has 12969 states and 33594 transitions. [2021-03-10 23:35:20,620 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.103448275862069) internal successors, (61), 28 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:20,620 INFO L276 IsEmpty]: Start isEmpty. Operand 12969 states and 33594 transitions. [2021-03-10 23:35:20,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:35:20,631 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:35:20,631 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:35:20,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1150,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:35:20,831 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:35:20,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:35:20,832 INFO L82 PathProgramCache]: Analyzing trace with hash -1347182557, now seen corresponding path program 114 times [2021-03-10 23:35:20,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:35:20,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388329484] [2021-03-10 23:35:20,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:35:20,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:35:21,604 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:35:21,808 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:35:21,990 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:35:22,348 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:35:22,823 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:22,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388329484] [2021-03-10 23:35:22,823 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409373256] [2021-03-10 23:35:22,823 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 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:35:22,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-03-10 23:35:22,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:35:22,846 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:35:22,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:35:25,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,632 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,645 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:25,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,661 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,665 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:25,702 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:25,705 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:25,722 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:25,722 INFO L244 Elim1Store]: Index analysis took 101 ms [2021-03-10 23:35:25,953 WARN L205 SmtUtils]: Spent 228.00 ms on a formula simplification that was a NOOP. DAG size: 52 [2021-03-10 23:35:25,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:25,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 6 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 17 case distinctions, treesize of input 81 treesize of output 95 [2021-03-10 23:35:26,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 3 xjuncts. [2021-03-10 23:35:26,245 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 27 [2021-03-10 23:35:26,246 INFO L628 ElimStorePlain]: treesize reduction 180, result has 17.4 percent of original size [2021-03-10 23:35:26,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:35:26,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:106, output treesize:50 [2021-03-10 23:35:26,656 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-10 23:35:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:27,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:35:27,057 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 19] total 33 [2021-03-10 23:35:27,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561094138] [2021-03-10 23:35:27,057 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-03-10 23:35:27,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:35:27,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-03-10 23:35:27,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-03-10 23:35:27,057 INFO L87 Difference]: Start difference. First operand 12969 states and 33594 transitions. Second operand has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:27,481 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 14 [2021-03-10 23:35:27,830 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2021-03-10 23:35:28,177 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2021-03-10 23:35:28,528 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:35:28,904 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2021-03-10 23:35:29,626 WARN L205 SmtUtils]: Spent 349.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:35:29,952 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2021-03-10 23:35:30,320 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-03-10 23:35:30,799 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:35:31,687 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-03-10 23:35:32,592 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:35:33,235 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 29 [2021-03-10 23:35:33,650 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 23:35:34,312 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-03-10 23:35:34,795 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 23:35:35,240 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 23:35:35,555 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 23:35:35,944 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 76 DAG size of output: 33 [2021-03-10 23:35:36,456 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2021-03-10 23:35:36,929 WARN L205 SmtUtils]: Spent 364.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:35:37,193 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-03-10 23:35:37,594 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 31 [2021-03-10 23:35:38,132 WARN L205 SmtUtils]: Spent 305.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-03-10 23:35:38,596 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:35:38,904 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 38 [2021-03-10 23:35:39,312 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 23:35:39,771 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 36 [2021-03-10 23:35:40,339 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-03-10 23:35:40,617 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:35:41,162 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 46 [2021-03-10 23:35:41,441 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-10 23:35:41,842 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 72 DAG size of output: 35 [2021-03-10 23:35:42,260 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 33 [2021-03-10 23:35:42,612 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 23 [2021-03-10 23:35:42,973 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 23:35:43,473 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 28 [2021-03-10 23:35:43,978 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 30 [2021-03-10 23:35:44,297 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:35:44,682 WARN L205 SmtUtils]: Spent 243.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 29 [2021-03-10 23:35:45,066 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 70 DAG size of output: 37 [2021-03-10 23:35:45,635 WARN L205 SmtUtils]: Spent 455.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:35:45,954 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-10 23:35:46,280 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2021-03-10 23:35:46,966 WARN L205 SmtUtils]: Spent 160.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 38 [2021-03-10 23:35:47,229 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:35:47,748 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:35:48,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:35:48,301 INFO L93 Difference]: Finished difference Result 17247 states and 43500 transitions. [2021-03-10 23:35:48,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-03-10 23:35:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:35:48,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:35:48,332 INFO L225 Difference]: With dead ends: 17247 [2021-03-10 23:35:48,332 INFO L226 Difference]: Without dead ends: 17229 [2021-03-10 23:35:48,333 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2067 ImplicationChecksByTransitivity, 20189.3ms TimeCoverageRelationStatistics Valid=1094, Invalid=5878, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:35:48,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17229 states. [2021-03-10 23:35:48,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17229 to 13164. [2021-03-10 23:35:48,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13164 states, 13163 states have (on average 2.5889994682063358) internal successors, (34079), 13163 states have internal predecessors, (34079), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:48,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13164 states to 13164 states and 34079 transitions. [2021-03-10 23:35:48,528 INFO L78 Accepts]: Start accepts. Automaton has 13164 states and 34079 transitions. Word has length 34 [2021-03-10 23:35:48,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:35:48,529 INFO L480 AbstractCegarLoop]: Abstraction has 13164 states and 34079 transitions. [2021-03-10 23:35:48,529 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 33 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:48,529 INFO L276 IsEmpty]: Start isEmpty. Operand 13164 states and 34079 transitions. [2021-03-10 23:35:48,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:35:48,544 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:35:48,544 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:35:48,755 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1151,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:35:48,755 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:35:48,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:35:48,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1730933317, now seen corresponding path program 115 times [2021-03-10 23:35:48,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:35:48,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474502993] [2021-03-10 23:35:48,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:35:48,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:35:49,573 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 32 [2021-03-10 23:35:49,783 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 29 [2021-03-10 23:35:49,994 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:35:50,415 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:35:50,729 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 4 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:50,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474502993] [2021-03-10 23:35:50,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96994784] [2021-03-10 23:35:50,730 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:35:50,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:35:50,751 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:35:50,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:35:53,111 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,116 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,120 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,124 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,130 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,138 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:53,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,146 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,150 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,160 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,162 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:53,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:53,173 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,178 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,183 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,188 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:35:53,190 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:53,192 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:35:53,194 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:35:53,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:35:53,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:35:53,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:35:53,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:35:53,405 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:35:53,405 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:35:53,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 14] total 27 [2021-03-10 23:35:53,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725225755] [2021-03-10 23:35:53,405 INFO L460 AbstractCegarLoop]: Interpolant automaton has 28 states [2021-03-10 23:35:53,406 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:35:53,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-03-10 23:35:53,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=673, Unknown=0, NotChecked=0, Total=756 [2021-03-10 23:35:53,406 INFO L87 Difference]: Start difference. First operand 13164 states and 34079 transitions. Second operand has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:35:53,897 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 23:35:54,252 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:35:54,534 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:35:54,936 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:35:55,340 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-03-10 23:35:55,862 WARN L205 SmtUtils]: Spent 362.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 23:35:56,242 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:35:56,744 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-03-10 23:35:57,407 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-03-10 23:35:58,045 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 30 [2021-03-10 23:35:58,832 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 33 [2021-03-10 23:35:59,197 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:35:59,636 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 33 [2021-03-10 23:36:00,013 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:36:00,373 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 28 [2021-03-10 23:36:00,804 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:36:01,121 WARN L205 SmtUtils]: Spent 220.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:36:01,474 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 34 [2021-03-10 23:36:01,960 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-03-10 23:36:02,251 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:36:02,698 WARN L205 SmtUtils]: Spent 226.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 26 [2021-03-10 23:36:03,204 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 31 [2021-03-10 23:36:03,564 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-10 23:36:03,881 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 30 [2021-03-10 23:36:04,468 WARN L205 SmtUtils]: Spent 337.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 50 [2021-03-10 23:36:04,713 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:36:05,105 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-10 23:36:05,527 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:36:06,123 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 23:36:06,516 WARN L205 SmtUtils]: Spent 186.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:36:07,183 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:36:07,619 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:36:08,322 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:36:09,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:09,053 INFO L93 Difference]: Finished difference Result 13713 states and 35208 transitions. [2021-03-10 23:36:09,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:36:09,058 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 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 34 [2021-03-10 23:36:09,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:09,078 INFO L225 Difference]: With dead ends: 13713 [2021-03-10 23:36:09,078 INFO L226 Difference]: Without dead ends: 13702 [2021-03-10 23:36:09,078 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 21 SyntacticMatches, 3 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1009 ImplicationChecksByTransitivity, 13511.9ms TimeCoverageRelationStatistics Valid=473, Invalid=3559, Unknown=0, NotChecked=0, Total=4032 [2021-03-10 23:36:09,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13702 states. [2021-03-10 23:36:09,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13702 to 13248. [2021-03-10 23:36:09,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13248 states, 13247 states have (on average 2.587529251906092) internal successors, (34277), 13247 states have internal predecessors, (34277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:36:09,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13248 states to 13248 states and 34277 transitions. [2021-03-10 23:36:09,249 INFO L78 Accepts]: Start accepts. Automaton has 13248 states and 34277 transitions. Word has length 34 [2021-03-10 23:36:09,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:09,249 INFO L480 AbstractCegarLoop]: Abstraction has 13248 states and 34277 transitions. [2021-03-10 23:36:09,249 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 28 states, 28 states have (on average 2.107142857142857) internal successors, (59), 27 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:36:09,249 INFO L276 IsEmpty]: Start isEmpty. Operand 13248 states and 34277 transitions. [2021-03-10 23:36:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:36:09,260 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:09,261 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:09,461 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1164,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:09,461 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:09,462 INFO L82 PathProgramCache]: Analyzing trace with hash -1270909581, now seen corresponding path program 116 times [2021-03-10 23:36:09,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:09,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1404386265] [2021-03-10 23:36:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:09,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:10,773 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:36:11,237 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:36:11,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1404386265] [2021-03-10 23:36:11,238 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852057794] [2021-03-10 23:36:11,238 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:11,259 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:36:11,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:11,260 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:36:11,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:13,448 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,452 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,455 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,459 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,463 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,469 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,474 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,481 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:13,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,492 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,496 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:13,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,512 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,516 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,518 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:13,522 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:13,524 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:13,526 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:13,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:36:13,534 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:36:13,565 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:13,571 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:13,571 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:36:13,703 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:13,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:13,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 25 [2021-03-10 23:36:13,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703813720] [2021-03-10 23:36:13,704 INFO L460 AbstractCegarLoop]: Interpolant automaton has 26 states [2021-03-10 23:36:13,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:13,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-03-10 23:36:13,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=568, Unknown=0, NotChecked=0, Total=650 [2021-03-10 23:36:13,704 INFO L87 Difference]: Start difference. First operand 13248 states and 34277 transitions. Second operand has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-03-10 23:36:14,293 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:36:14,663 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:36:15,215 WARN L205 SmtUtils]: Spent 343.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 23:36:15,549 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:36:16,011 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-03-10 23:36:16,566 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-03-10 23:36:17,419 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:36:17,784 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:36:18,288 WARN L205 SmtUtils]: Spent 326.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 35 [2021-03-10 23:36:18,522 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:36:18,871 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-03-10 23:36:19,151 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:36:19,331 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:36:19,889 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 39 [2021-03-10 23:36:20,204 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-03-10 23:36:20,562 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:36:21,218 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:36:21,554 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:36:21,809 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:36:22,167 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:36:22,696 WARN L205 SmtUtils]: Spent 279.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 30 [2021-03-10 23:36:23,294 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 34 [2021-03-10 23:36:23,611 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:36:24,033 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 24 [2021-03-10 23:36:24,309 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:36:24,886 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:36:25,243 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 23:36:25,629 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:36:26,365 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 15 [2021-03-10 23:36:26,857 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:36:27,335 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 23:36:27,687 WARN L205 SmtUtils]: Spent 201.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 49 [2021-03-10 23:36:28,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:36:28,378 INFO L93 Difference]: Finished difference Result 17175 states and 43386 transitions. [2021-03-10 23:36:28,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-03-10 23:36:28,384 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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 34 [2021-03-10 23:36:28,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:36:28,407 INFO L225 Difference]: With dead ends: 17175 [2021-03-10 23:36:28,407 INFO L226 Difference]: Without dead ends: 17142 [2021-03-10 23:36:28,408 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 954 ImplicationChecksByTransitivity, 12698.4ms TimeCoverageRelationStatistics Valid=524, Invalid=3136, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:36:28,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17142 states. [2021-03-10 23:36:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17142 to 13366. [2021-03-10 23:36:28,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13366 states, 13365 states have (on average 2.5841376730265617) internal successors, (34537), 13365 states have internal predecessors, (34537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:36:28,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13366 states to 13366 states and 34537 transitions. [2021-03-10 23:36:28,587 INFO L78 Accepts]: Start accepts. Automaton has 13366 states and 34537 transitions. Word has length 34 [2021-03-10 23:36:28,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:36:28,587 INFO L480 AbstractCegarLoop]: Abstraction has 13366 states and 34537 transitions. [2021-03-10 23:36:28,588 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 26 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 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) [2021-03-10 23:36:28,588 INFO L276 IsEmpty]: Start isEmpty. Operand 13366 states and 34537 transitions. [2021-03-10 23:36:28,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:36:28,598 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:36:28,598 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:36:28,798 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1165 [2021-03-10 23:36:28,798 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:36:28,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:36:28,798 INFO L82 PathProgramCache]: Analyzing trace with hash 954034479, now seen corresponding path program 117 times [2021-03-10 23:36:28,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:36:28,799 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321369249] [2021-03-10 23:36:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:36:28,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:36:29,906 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:36:30,375 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:36:30,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321369249] [2021-03-10 23:36:30,375 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808209878] [2021-03-10 23:36:30,375 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:36:30,396 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-03-10 23:36:30,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:36:30,397 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:36:30,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:36:33,721 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:33,742 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:33,744 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:33,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:33,797 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:33,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:33,806 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:36:33,814 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:33,823 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:36:33,840 INFO L244 Elim1Store]: Index analysis took 159 ms [2021-03-10 23:36:34,306 WARN L205 SmtUtils]: Spent 463.00 ms on a formula simplification that was a NOOP. DAG size: 81 [2021-03-10 23:36:34,308 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:36:34,308 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 5 disjoint index pairs (out of 45 index pairs), introduced 7 new quantified variables, introduced 28 case distinctions, treesize of input 85 treesize of output 181 [2021-03-10 23:36:36,780 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 4 xjuncts. [2021-03-10 23:36:38,088 WARN L205 SmtUtils]: Spent 1.31 s on a formula simplification. DAG size of input: 269 DAG size of output: 27 [2021-03-10 23:36:38,089 INFO L628 ElimStorePlain]: treesize reduction 2857, result has 1.3 percent of original size [2021-03-10 23:36:38,110 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:36:38,110 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:110, output treesize:50 [2021-03-10 23:36:38,531 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 21 [2021-03-10 23:36:38,901 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:36:38,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:36:38,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 19] total 30 [2021-03-10 23:36:38,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475069741] [2021-03-10 23:36:38,902 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-03-10 23:36:38,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:36:38,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-03-10 23:36:38,902 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=820, Unknown=0, NotChecked=0, Total=930 [2021-03-10 23:36:38,902 INFO L87 Difference]: Start difference. First operand 13366 states and 34537 transitions. Second operand has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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) [2021-03-10 23:36:39,400 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:36:39,837 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 19 [2021-03-10 23:36:40,195 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 37 [2021-03-10 23:36:40,712 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:36:41,173 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 26 [2021-03-10 23:36:41,955 WARN L205 SmtUtils]: Spent 379.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 56 [2021-03-10 23:36:42,271 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 26 [2021-03-10 23:36:42,696 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 15 [2021-03-10 23:36:43,222 WARN L205 SmtUtils]: Spent 321.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 21 [2021-03-10 23:36:43,767 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 32 [2021-03-10 23:36:44,141 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:36:44,754 WARN L205 SmtUtils]: Spent 459.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 28 [2021-03-10 23:36:46,279 WARN L205 SmtUtils]: Spent 234.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 40 [2021-03-10 23:36:46,968 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:36:47,902 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2021-03-10 23:36:48,350 WARN L205 SmtUtils]: Spent 286.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 54 [2021-03-10 23:36:48,606 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 17 [2021-03-10 23:36:48,906 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 27 [2021-03-10 23:36:49,362 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 67 DAG size of output: 33 [2021-03-10 23:36:49,737 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 24 [2021-03-10 23:36:50,056 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 17 [2021-03-10 23:36:50,708 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 36 [2021-03-10 23:36:51,302 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 27 [2021-03-10 23:36:52,124 WARN L205 SmtUtils]: Spent 249.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 46 [2021-03-10 23:36:52,580 WARN L205 SmtUtils]: Spent 288.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 26 [2021-03-10 23:36:53,198 WARN L205 SmtUtils]: Spent 410.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:36:53,843 WARN L205 SmtUtils]: Spent 423.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 53 [2021-03-10 23:36:54,157 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 36 [2021-03-10 23:36:54,796 WARN L205 SmtUtils]: Spent 162.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 16 [2021-03-10 23:36:55,174 WARN L205 SmtUtils]: Spent 222.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 21 [2021-03-10 23:36:55,867 WARN L205 SmtUtils]: Spent 567.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 51 [2021-03-10 23:36:56,613 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 37 [2021-03-10 23:36:59,878 WARN L205 SmtUtils]: Spent 282.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:37:00,287 WARN L205 SmtUtils]: Spent 277.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 22 [2021-03-10 23:37:00,785 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-10 23:37:01,258 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 27 [2021-03-10 23:37:01,993 WARN L205 SmtUtils]: Spent 594.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 49 [2021-03-10 23:37:02,499 WARN L205 SmtUtils]: Spent 339.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 23:37:02,865 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2021-03-10 23:37:03,593 WARN L205 SmtUtils]: Spent 478.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 44 [2021-03-10 23:37:03,866 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:37:04,912 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 43 [2021-03-10 23:37:05,528 WARN L205 SmtUtils]: Spent 465.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 38 [2021-03-10 23:37:06,174 WARN L205 SmtUtils]: Spent 416.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 52 [2021-03-10 23:37:06,985 WARN L205 SmtUtils]: Spent 425.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 43 [2021-03-10 23:37:07,590 WARN L205 SmtUtils]: Spent 422.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2021-03-10 23:37:08,039 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 37 [2021-03-10 23:37:08,943 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 65 DAG size of output: 40 [2021-03-10 23:37:09,607 WARN L205 SmtUtils]: Spent 436.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 50 [2021-03-10 23:37:10,472 WARN L205 SmtUtils]: Spent 367.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 32 [2021-03-10 23:37:11,217 WARN L205 SmtUtils]: Spent 564.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 32 [2021-03-10 23:37:11,566 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:37:12,834 WARN L205 SmtUtils]: Spent 198.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 35 [2021-03-10 23:37:13,418 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 42 [2021-03-10 23:37:14,252 WARN L205 SmtUtils]: Spent 352.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 37 [2021-03-10 23:37:15,224 WARN L205 SmtUtils]: Spent 533.00 ms on a formula simplification. DAG size of input: 68 DAG size of output: 46 [2021-03-10 23:37:15,711 WARN L205 SmtUtils]: Spent 309.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 36 [2021-03-10 23:37:16,441 WARN L205 SmtUtils]: Spent 576.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 49 [2021-03-10 23:37:16,902 WARN L205 SmtUtils]: Spent 268.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 25 [2021-03-10 23:37:17,524 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 46 [2021-03-10 23:37:18,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:18,360 INFO L93 Difference]: Finished difference Result 17601 states and 44286 transitions. [2021-03-10 23:37:18,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-03-10 23:37:18,365 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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 34 [2021-03-10 23:37:18,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:18,390 INFO L225 Difference]: With dead ends: 17601 [2021-03-10 23:37:18,390 INFO L226 Difference]: Without dead ends: 17577 [2021-03-10 23:37:18,391 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 17 SyntacticMatches, 5 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2748 ImplicationChecksByTransitivity, 30064.4ms TimeCoverageRelationStatistics Valid=1235, Invalid=7507, Unknown=0, NotChecked=0, Total=8742 [2021-03-10 23:37:18,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17577 states. [2021-03-10 23:37:18,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17577 to 13371. [2021-03-10 23:37:18,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13371 states, 13370 states have (on average 2.5842931937172775) internal successors, (34552), 13370 states have internal predecessors, (34552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:18,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13371 states to 13371 states and 34552 transitions. [2021-03-10 23:37:18,584 INFO L78 Accepts]: Start accepts. Automaton has 13371 states and 34552 transitions. Word has length 34 [2021-03-10 23:37:18,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:18,584 INFO L480 AbstractCegarLoop]: Abstraction has 13371 states and 34552 transitions. [2021-03-10 23:37:18,584 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.8709677419354838) internal successors, (58), 30 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) [2021-03-10 23:37:18,584 INFO L276 IsEmpty]: Start isEmpty. Operand 13371 states and 34552 transitions. [2021-03-10 23:37:18,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:37:18,594 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:18,594 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:18,795 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-03-10 23:37:18,795 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:18,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:18,795 INFO L82 PathProgramCache]: Analyzing trace with hash -262816943, now seen corresponding path program 118 times [2021-03-10 23:37:18,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:18,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984013577] [2021-03-10 23:37:18,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:18,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:19,914 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:37:20,232 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 46 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-03-10 23:37:20,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984013577] [2021-03-10 23:37:20,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123662529] [2021-03-10 23:37:20,232 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:20,252 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:37:20,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:20,253 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:37:20,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:22,526 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,540 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,546 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,559 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:22,568 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,574 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,581 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,587 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,590 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:22,599 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,605 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,611 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,624 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,627 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:22,630 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:22,639 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,646 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:22,650 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:22,650 INFO L244 Elim1Store]: Index analysis took 129 ms [2021-03-10 23:37:22,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:37:22,663 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:22,712 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:22,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:22,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:37:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:22,949 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:22,949 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-03-10 23:37:22,949 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028717863] [2021-03-10 23:37:22,950 INFO L460 AbstractCegarLoop]: Interpolant automaton has 25 states [2021-03-10 23:37:22,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:22,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-03-10 23:37:22,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=534, Unknown=0, NotChecked=0, Total=600 [2021-03-10 23:37:22,950 INFO L87 Difference]: Start difference. First operand 13371 states and 34552 transitions. Second operand has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-03-10 23:37:23,360 WARN L205 SmtUtils]: Spent 115.00 ms on a formula simplification. DAG size of input: 15 DAG size of output: 14 [2021-03-10 23:37:23,767 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:37:24,086 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:37:24,511 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:37:24,932 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification. DAG size of input: 20 DAG size of output: 14 [2021-03-10 23:37:25,484 WARN L205 SmtUtils]: Spent 391.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 23:37:25,839 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:37:26,320 WARN L205 SmtUtils]: Spent 206.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-03-10 23:37:27,050 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 29 [2021-03-10 23:37:27,382 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-10 23:37:27,874 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2021-03-10 23:37:28,506 WARN L205 SmtUtils]: Spent 232.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:37:28,902 WARN L205 SmtUtils]: Spent 164.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:37:29,466 WARN L205 SmtUtils]: Spent 360.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 38 [2021-03-10 23:37:29,719 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:37:30,108 WARN L205 SmtUtils]: Spent 194.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 25 [2021-03-10 23:37:30,424 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:37:30,726 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:37:31,115 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 24 [2021-03-10 23:37:31,444 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 27 [2021-03-10 23:37:31,827 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:37:32,313 WARN L205 SmtUtils]: Spent 261.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 33 [2021-03-10 23:37:32,781 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:37:33,104 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:37:33,602 WARN L205 SmtUtils]: Spent 188.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 21 [2021-03-10 23:37:34,232 WARN L205 SmtUtils]: Spent 431.00 ms on a formula simplification. DAG size of input: 58 DAG size of output: 38 [2021-03-10 23:37:34,518 WARN L205 SmtUtils]: Spent 136.00 ms on a formula simplification that was a NOOP. DAG size: 34 [2021-03-10 23:37:34,898 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 24 [2021-03-10 23:37:35,363 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 31 [2021-03-10 23:37:35,614 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:37:35,995 WARN L205 SmtUtils]: Spent 126.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:37:36,579 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:37:37,002 WARN L205 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 23:37:37,378 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:37:38,170 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:37:38,620 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:37:39,505 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:37:40,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:40,206 INFO L93 Difference]: Finished difference Result 14361 states and 36649 transitions. [2021-03-10 23:37:40,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:37:40,213 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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 34 [2021-03-10 23:37:40,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:40,236 INFO L225 Difference]: With dead ends: 14361 [2021-03-10 23:37:40,236 INFO L226 Difference]: Without dead ends: 14343 [2021-03-10 23:37:40,237 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 5 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 14108.9ms TimeCoverageRelationStatistics Valid=452, Invalid=3454, Unknown=0, NotChecked=0, Total=3906 [2021-03-10 23:37:40,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14343 states. [2021-03-10 23:37:40,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14343 to 13364. [2021-03-10 23:37:40,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13364 states, 13363 states have (on average 2.5842250991543816) internal successors, (34533), 13363 states have internal predecessors, (34533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:40,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13364 states to 13364 states and 34533 transitions. [2021-03-10 23:37:40,446 INFO L78 Accepts]: Start accepts. Automaton has 13364 states and 34533 transitions. Word has length 34 [2021-03-10 23:37:40,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:40,446 INFO L480 AbstractCegarLoop]: Abstraction has 13364 states and 34533 transitions. [2021-03-10 23:37:40,446 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 25 states, 25 states have (on average 2.24) internal successors, (56), 24 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) [2021-03-10 23:37:40,446 INFO L276 IsEmpty]: Start isEmpty. Operand 13364 states and 34533 transitions. [2021-03-10 23:37:40,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:37:40,457 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:40,457 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:40,657 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1520 [2021-03-10 23:37:40,657 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:40,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash -766181841, now seen corresponding path program 119 times [2021-03-10 23:37:40,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:40,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620910441] [2021-03-10 23:37:40,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:40,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:41,658 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 26 [2021-03-10 23:37:42,049 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 23 [2021-03-10 23:37:42,265 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:37:42,594 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:37:42,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620910441] [2021-03-10 23:37:42,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714415444] [2021-03-10 23:37:42,594 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:42,615 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-03-10 23:37:42,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:42,616 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:37:42,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:37:44,832 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,836 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,840 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,844 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,848 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,859 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:44,865 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,869 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,875 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:44,879 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,883 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,889 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,891 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:44,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:37:44,897 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:44,899 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:37:44,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:37:44,908 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:37:44,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:37:44,947 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:37:44,947 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:37:45,090 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:37:45,091 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:37:45,091 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-03-10 23:37:45,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891231826] [2021-03-10 23:37:45,091 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:37:45,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:37:45,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:37:45,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=616, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:37:45,091 INFO L87 Difference]: Start difference. First operand 13364 states and 34533 transitions. Second operand has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:45,707 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:37:46,091 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 18 [2021-03-10 23:37:46,535 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 23 [2021-03-10 23:37:46,889 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:37:47,342 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 25 [2021-03-10 23:37:47,819 WARN L205 SmtUtils]: Spent 157.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 29 [2021-03-10 23:37:48,215 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 29 [2021-03-10 23:37:48,764 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-10 23:37:49,094 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:37:49,564 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 24 [2021-03-10 23:37:49,814 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:37:50,247 WARN L205 SmtUtils]: Spent 212.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 25 [2021-03-10 23:37:50,660 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:37:51,055 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 24 [2021-03-10 23:37:51,386 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 25 [2021-03-10 23:37:51,768 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 25 [2021-03-10 23:37:52,041 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:37:52,366 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 20 [2021-03-10 23:37:52,757 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:37:53,062 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:37:53,340 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 37 [2021-03-10 23:37:53,843 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 55 DAG size of output: 37 [2021-03-10 23:37:54,222 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:37:54,705 WARN L205 SmtUtils]: Spent 202.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 23:37:54,940 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:37:55,279 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 38 [2021-03-10 23:37:55,698 WARN L205 SmtUtils]: Spent 151.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 42 [2021-03-10 23:37:56,169 WARN L205 SmtUtils]: Spent 179.00 ms on a formula simplification. DAG size of input: 61 DAG size of output: 46 [2021-03-10 23:37:56,852 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:37:57,229 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 48 [2021-03-10 23:37:57,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:37:57,903 INFO L93 Difference]: Finished difference Result 16726 states and 42395 transitions. [2021-03-10 23:37:57,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-03-10 23:37:57,908 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:37:57,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:37:57,929 INFO L225 Difference]: With dead ends: 16726 [2021-03-10 23:37:57,929 INFO L226 Difference]: Without dead ends: 16678 [2021-03-10 23:37:57,930 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 865 ImplicationChecksByTransitivity, 11939.0ms TimeCoverageRelationStatistics Valid=517, Invalid=3023, Unknown=0, NotChecked=0, Total=3540 [2021-03-10 23:37:57,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16678 states. [2021-03-10 23:37:58,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16678 to 13376. [2021-03-10 23:37:58,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13376 states, 13375 states have (on average 2.582056074766355) internal successors, (34535), 13375 states have internal predecessors, (34535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:58,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13376 states to 13376 states and 34535 transitions. [2021-03-10 23:37:58,143 INFO L78 Accepts]: Start accepts. Automaton has 13376 states and 34535 transitions. Word has length 34 [2021-03-10 23:37:58,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:37:58,143 INFO L480 AbstractCegarLoop]: Abstraction has 13376 states and 34535 transitions. [2021-03-10 23:37:58,143 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:37:58,143 INFO L276 IsEmpty]: Start isEmpty. Operand 13376 states and 34535 transitions. [2021-03-10 23:37:58,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:37:58,153 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:37:58,153 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:37:58,353 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1521,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:58,353 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:37:58,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:37:58,354 INFO L82 PathProgramCache]: Analyzing trace with hash -480560951, now seen corresponding path program 120 times [2021-03-10 23:37:58,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:37:58,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087014043] [2021-03-10 23:37:58,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:37:58,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:37:59,137 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 26 [2021-03-10 23:37:59,538 WARN L205 SmtUtils]: Spent 187.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:37:59,854 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 48 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-03-10 23:37:59,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087014043] [2021-03-10 23:37:59,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096953375] [2021-03-10 23:37:59,855 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:37:59,875 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-03-10 23:37:59,875 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:37:59,876 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 45 conjunts are in the unsatisfiable core [2021-03-10 23:37:59,876 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:02,697 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,701 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,710 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,715 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,719 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,727 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,773 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,777 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,779 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:02,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,791 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,798 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:02,802 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,807 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:02,809 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:02,811 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:02,811 INFO L244 Elim1Store]: Index analysis took 123 ms [2021-03-10 23:38:02,948 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:38:02,950 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:02,950 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 6 new quantified variables, introduced 9 case distinctions, treesize of input 81 treesize of output 57 [2021-03-10 23:38:02,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-03-10 23:38:03,093 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:03,113 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:38:03,113 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:103, output treesize:24 [2021-03-10 23:38:03,521 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:03,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:03,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 17] total 28 [2021-03-10 23:38:03,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528927315] [2021-03-10 23:38:03,521 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-03-10 23:38:03,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:03,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-03-10 23:38:03,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=729, Unknown=0, NotChecked=0, Total=812 [2021-03-10 23:38:03,522 INFO L87 Difference]: Start difference. First operand 13376 states and 34535 transitions. Second operand has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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) [2021-03-10 23:38:04,230 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:38:04,480 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-10 23:38:04,877 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 18 [2021-03-10 23:38:05,804 WARN L205 SmtUtils]: Spent 370.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 37 [2021-03-10 23:38:06,169 WARN L205 SmtUtils]: Spent 227.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 24 [2021-03-10 23:38:06,649 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 25 [2021-03-10 23:38:07,284 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 29 [2021-03-10 23:38:07,921 WARN L205 SmtUtils]: Spent 153.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 29 [2021-03-10 23:38:08,725 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-10 23:38:09,078 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 20 [2021-03-10 23:38:09,734 WARN L205 SmtUtils]: Spent 336.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-03-10 23:38:09,995 WARN L205 SmtUtils]: Spent 150.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:38:10,416 WARN L205 SmtUtils]: Spent 209.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 25 [2021-03-10 23:38:10,889 WARN L205 SmtUtils]: Spent 237.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 28 [2021-03-10 23:38:11,228 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 27 [2021-03-10 23:38:11,577 WARN L205 SmtUtils]: Spent 174.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 24 [2021-03-10 23:38:11,899 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 34 DAG size of output: 25 [2021-03-10 23:38:12,313 WARN L205 SmtUtils]: Spent 207.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 26 [2021-03-10 23:38:12,529 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:38:12,840 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2021-03-10 23:38:13,216 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2021-03-10 23:38:13,521 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:38:13,974 WARN L205 SmtUtils]: Spent 294.00 ms on a formula simplification. DAG size of input: 62 DAG size of output: 53 [2021-03-10 23:38:14,485 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 40 [2021-03-10 23:38:15,360 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 46 [2021-03-10 23:38:15,596 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:38:15,947 WARN L205 SmtUtils]: Spent 196.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 41 [2021-03-10 23:38:16,900 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 23:38:17,531 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 45 [2021-03-10 23:38:18,066 WARN L205 SmtUtils]: Spent 108.00 ms on a formula simplification. DAG size of input: 18 DAG size of output: 14 [2021-03-10 23:38:18,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:18,599 INFO L93 Difference]: Finished difference Result 14154 states and 36163 transitions. [2021-03-10 23:38:18,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-03-10 23:38:18,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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 34 [2021-03-10 23:38:18,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:18,622 INFO L225 Difference]: With dead ends: 14154 [2021-03-10 23:38:18,622 INFO L226 Difference]: Without dead ends: 14127 [2021-03-10 23:38:18,622 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 13215.5ms TimeCoverageRelationStatistics Valid=494, Invalid=3796, Unknown=0, NotChecked=0, Total=4290 [2021-03-10 23:38:18,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14127 states. [2021-03-10 23:38:18,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14127 to 13385. [2021-03-10 23:38:18,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13385 states, 13384 states have (on average 2.5813658099222954) internal successors, (34549), 13384 states have internal predecessors, (34549), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:18,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13385 states to 13385 states and 34549 transitions. [2021-03-10 23:38:18,775 INFO L78 Accepts]: Start accepts. Automaton has 13385 states and 34549 transitions. Word has length 34 [2021-03-10 23:38:18,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:18,775 INFO L480 AbstractCegarLoop]: Abstraction has 13385 states and 34549 transitions. [2021-03-10 23:38:18,775 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0689655172413794) internal successors, (60), 28 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) [2021-03-10 23:38:18,775 INFO L276 IsEmpty]: Start isEmpty. Operand 13385 states and 34549 transitions. [2021-03-10 23:38:18,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:38:18,784 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:18,784 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:18,985 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1522 [2021-03-10 23:38:18,985 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:18,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:18,985 INFO L82 PathProgramCache]: Analyzing trace with hash -915560657, now seen corresponding path program 121 times [2021-03-10 23:38:18,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:18,985 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882163229] [2021-03-10 23:38:18,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:18,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:19,737 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-10 23:38:20,000 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:38:20,228 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:38:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:38:20,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882163229] [2021-03-10 23:38:20,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634328555] [2021-03-10 23:38:20,640 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:20,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:20,659 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:38:20,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:22,741 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,745 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,749 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,751 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:22,755 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,759 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,763 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,765 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:22,770 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,774 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,783 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,787 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,789 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:22,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,799 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:22,801 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:22,803 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:22,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:38:22,811 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:22,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:22,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:38:22,991 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:22,991 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:22,991 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-03-10 23:38:22,991 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799403254] [2021-03-10 23:38:22,991 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:38:22,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:22,992 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:38:22,992 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=607, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:38:22,992 INFO L87 Difference]: Start difference. First operand 13385 states and 34549 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-03-10 23:38:23,537 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 16 [2021-03-10 23:38:23,876 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 32 DAG size of output: 25 [2021-03-10 23:38:24,361 WARN L205 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 35 [2021-03-10 23:38:24,659 WARN L205 SmtUtils]: Spent 197.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:38:25,214 WARN L205 SmtUtils]: Spent 299.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 33 [2021-03-10 23:38:25,790 WARN L205 SmtUtils]: Spent 269.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 42 [2021-03-10 23:38:26,351 WARN L205 SmtUtils]: Spent 312.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 40 [2021-03-10 23:38:26,907 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 40 [2021-03-10 23:38:27,414 WARN L205 SmtUtils]: Spent 161.00 ms on a formula simplification that was a NOOP. DAG size: 38 [2021-03-10 23:38:27,796 WARN L205 SmtUtils]: Spent 229.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 31 [2021-03-10 23:38:28,050 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 35 [2021-03-10 23:38:28,753 WARN L205 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 35 [2021-03-10 23:38:29,051 WARN L205 SmtUtils]: Spent 166.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:38:29,222 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:38:29,480 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-10 23:38:29,994 WARN L205 SmtUtils]: Spent 146.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 23:38:30,203 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:38:30,580 WARN L205 SmtUtils]: Spent 104.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:38:30,935 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:38:31,298 WARN L205 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 43 [2021-03-10 23:38:31,657 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:38:31,886 WARN L205 SmtUtils]: Spent 142.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:38:32,524 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 14 [2021-03-10 23:38:32,747 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-10 23:38:33,129 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:38:33,745 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 26 [2021-03-10 23:38:34,047 WARN L205 SmtUtils]: Spent 200.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 25 [2021-03-10 23:38:34,501 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 37 [2021-03-10 23:38:34,977 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 23:38:35,384 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:38:35,691 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification. DAG size of input: 51 DAG size of output: 48 [2021-03-10 23:38:36,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:38:36,418 INFO L93 Difference]: Finished difference Result 17444 states and 44052 transitions. [2021-03-10 23:38:36,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-03-10 23:38:36,423 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 34 [2021-03-10 23:38:36,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:38:36,445 INFO L225 Difference]: With dead ends: 17444 [2021-03-10 23:38:36,445 INFO L226 Difference]: Without dead ends: 17411 [2021-03-10 23:38:36,446 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1199 ImplicationChecksByTransitivity, 12129.3ms TimeCoverageRelationStatistics Valid=641, Invalid=3519, Unknown=0, NotChecked=0, Total=4160 [2021-03-10 23:38:36,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17411 states. [2021-03-10 23:38:36,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17411 to 13409. [2021-03-10 23:38:36,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13409 states, 13408 states have (on average 2.5803251789976134) internal successors, (34597), 13408 states have internal predecessors, (34597), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:38:36,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13409 states to 13409 states and 34597 transitions. [2021-03-10 23:38:36,669 INFO L78 Accepts]: Start accepts. Automaton has 13409 states and 34597 transitions. Word has length 34 [2021-03-10 23:38:36,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:38:36,670 INFO L480 AbstractCegarLoop]: Abstraction has 13409 states and 34597 transitions. [2021-03-10 23:38:36,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-03-10 23:38:36,670 INFO L276 IsEmpty]: Start isEmpty. Operand 13409 states and 34597 transitions. [2021-03-10 23:38:36,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:38:36,680 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:38:36,680 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:38:36,881 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1526,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:36,881 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:38:36,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:38:36,881 INFO L82 PathProgramCache]: Analyzing trace with hash 1309383403, now seen corresponding path program 122 times [2021-03-10 23:38:36,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:38:36,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389188365] [2021-03-10 23:38:36,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:38:36,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:38:37,642 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-10 23:38:37,906 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:38:38,138 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:38:38,563 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 1 proven. 47 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-03-10 23:38:38,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389188365] [2021-03-10 23:38:38,563 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [53981189] [2021-03-10 23:38:38,563 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:38:38,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-03-10 23:38:38,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:38:38,583 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:38:38,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:38:40,582 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,586 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,590 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,598 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,613 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,615 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:40,619 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,622 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,630 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,635 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,643 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:40,647 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,651 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,654 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,660 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,662 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:40,664 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:40,668 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:38:40,670 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:38:40,672 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:38:40,678 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:38:40,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:38:40,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:38:40,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:38:40,881 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:38:40,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:38:40,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-03-10 23:38:40,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818860207] [2021-03-10 23:38:40,882 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:38:40,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:38:40,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:38:40,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=611, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:38:40,882 INFO L87 Difference]: Start difference. First operand 13409 states and 34597 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-03-10 23:38:41,493 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 24 [2021-03-10 23:38:41,824 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 29 DAG size of output: 23 [2021-03-10 23:38:42,216 WARN L205 SmtUtils]: Spent 238.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 25 [2021-03-10 23:38:42,929 WARN L205 SmtUtils]: Spent 250.00 ms on a formula simplification. DAG size of input: 40 DAG size of output: 30 [2021-03-10 23:38:43,334 WARN L205 SmtUtils]: Spent 287.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 29 [2021-03-10 23:38:43,607 WARN L205 SmtUtils]: Spent 120.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:38:44,066 WARN L205 SmtUtils]: Spent 346.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2021-03-10 23:38:44,653 WARN L205 SmtUtils]: Spent 224.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 23:38:45,084 WARN L205 SmtUtils]: Spent 315.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 36 [2021-03-10 23:38:46,140 WARN L205 SmtUtils]: Spent 332.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 44 [2021-03-10 23:38:46,814 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:38:47,242 WARN L205 SmtUtils]: Spent 313.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 41 [2021-03-10 23:38:47,722 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:38:47,923 WARN L205 SmtUtils]: Spent 118.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:38:48,201 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification that was a NOOP. DAG size: 42 [2021-03-10 23:38:48,584 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 23 [2021-03-10 23:38:48,790 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:38:49,053 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 21 DAG size of output: 13 [2021-03-10 23:38:49,319 WARN L205 SmtUtils]: Spent 158.00 ms on a formula simplification that was a NOOP. DAG size: 39 [2021-03-10 23:38:49,701 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 32 [2021-03-10 23:38:50,182 WARN L205 SmtUtils]: Spent 357.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2021-03-10 23:38:50,683 WARN L205 SmtUtils]: Spent 355.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 37 [2021-03-10 23:38:50,965 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification that was a NOOP. DAG size: 37 [2021-03-10 23:38:51,231 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 36 [2021-03-10 23:38:51,553 WARN L205 SmtUtils]: Spent 216.00 ms on a formula simplification. DAG size of input: 28 DAG size of output: 22 [2021-03-10 23:38:51,947 WARN L205 SmtUtils]: Spent 285.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 28 [2021-03-10 23:38:52,592 WARN L205 SmtUtils]: Spent 119.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 18 [2021-03-10 23:38:52,850 WARN L205 SmtUtils]: Spent 130.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:38:53,110 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:38:53,471 WARN L205 SmtUtils]: Spent 213.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 26 [2021-03-10 23:38:53,811 WARN L205 SmtUtils]: Spent 240.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 27 [2021-03-10 23:38:54,203 WARN L205 SmtUtils]: Spent 278.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 31 [2021-03-10 23:38:54,619 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 33 [2021-03-10 23:38:54,884 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:38:55,655 WARN L205 SmtUtils]: Spent 116.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 14 [2021-03-10 23:38:56,064 WARN L205 SmtUtils]: Spent 223.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 24 [2021-03-10 23:38:56,379 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:38:56,680 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:38:56,999 WARN L205 SmtUtils]: Spent 168.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:38:57,262 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 36 [2021-03-10 23:38:57,599 WARN L205 SmtUtils]: Spent 214.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 43 [2021-03-10 23:38:58,185 WARN L205 SmtUtils]: Spent 253.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 23:38:58,659 WARN L205 SmtUtils]: Spent 331.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 49 [2021-03-10 23:38:59,248 WARN L205 SmtUtils]: Spent 159.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 38 [2021-03-10 23:38:59,673 WARN L205 SmtUtils]: Spent 252.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 46 [2021-03-10 23:39:00,336 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:39:00,769 WARN L205 SmtUtils]: Spent 233.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 44 [2021-03-10 23:39:01,459 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 21 [2021-03-10 23:39:02,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:02,113 INFO L93 Difference]: Finished difference Result 17595 states and 44323 transitions. [2021-03-10 23:39:02,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-03-10 23:39:02,120 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 34 [2021-03-10 23:39:02,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:02,142 INFO L225 Difference]: With dead ends: 17595 [2021-03-10 23:39:02,142 INFO L226 Difference]: Without dead ends: 17576 [2021-03-10 23:39:02,143 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2085 ImplicationChecksByTransitivity, 18530.4ms TimeCoverageRelationStatistics Valid=928, Invalid=6044, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:39:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17576 states. [2021-03-10 23:39:02,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17576 to 13413. [2021-03-10 23:39:02,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 2.580748583358187) internal successors, (34613), 13412 states have internal predecessors, (34613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:02,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 34613 transitions. [2021-03-10 23:39:02,328 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 34613 transitions. Word has length 34 [2021-03-10 23:39:02,328 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:02,328 INFO L480 AbstractCegarLoop]: Abstraction has 13413 states and 34613 transitions. [2021-03-10 23:39:02,328 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-03-10 23:39:02,328 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 34613 transitions. [2021-03-10 23:39:02,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:39:02,339 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:02,340 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:02,541 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1527,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:02,541 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:02,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:02,541 INFO L82 PathProgramCache]: Analyzing trace with hash -2032929557, now seen corresponding path program 123 times [2021-03-10 23:39:02,542 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:02,542 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403660623] [2021-03-10 23:39:02,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:03,355 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:39:03,718 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:39:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:04,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403660623] [2021-03-10 23:39:04,116 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930906952] [2021-03-10 23:39:04,116 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:04,138 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-03-10 23:39:04,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:04,139 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:39:04,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:39:08,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,269 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,271 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:08,274 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,293 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,319 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:39:08,348 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:39:08,358 INFO L244 Elim1Store]: Index analysis took 170 ms [2021-03-10 23:39:08,980 WARN L205 SmtUtils]: Spent 619.00 ms on a formula simplification that was a NOOP. DAG size: 91 [2021-03-10 23:39:08,982 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:39:08,982 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 30 case distinctions, treesize of input 89 treesize of output 209 [2021-03-10 23:39:19,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 6 xjuncts. [2021-03-10 23:39:20,532 WARN L205 SmtUtils]: Spent 1.15 s on a formula simplification. DAG size of input: 383 DAG size of output: 23 [2021-03-10 23:39:20,534 INFO L628 ElimStorePlain]: treesize reduction 4411, result has 0.8 percent of original size [2021-03-10 23:39:20,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 3 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-03-10 23:39:20,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 4 variables, input treesize:111, output treesize:16 [2021-03-10 23:39:20,928 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:20,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:39:20,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 19] total 31 [2021-03-10 23:39:20,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151015927] [2021-03-10 23:39:20,929 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-03-10 23:39:20,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:39:20,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-03-10 23:39:20,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=867, Unknown=0, NotChecked=0, Total=992 [2021-03-10 23:39:20,930 INFO L87 Difference]: Start difference. First operand 13413 states and 34613 transitions. Second operand has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:21,485 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 14 [2021-03-10 23:39:21,942 WARN L205 SmtUtils]: Spent 185.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 46 [2021-03-10 23:39:22,947 WARN L205 SmtUtils]: Spent 329.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 36 [2021-03-10 23:39:23,654 WARN L205 SmtUtils]: Spent 217.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 33 [2021-03-10 23:39:25,417 WARN L205 SmtUtils]: Spent 450.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 43 [2021-03-10 23:39:25,935 WARN L205 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 19 DAG size of output: 16 [2021-03-10 23:39:28,484 WARN L205 SmtUtils]: Spent 114.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 15 [2021-03-10 23:39:29,266 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2021-03-10 23:39:29,795 WARN L205 SmtUtils]: Spent 266.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 44 [2021-03-10 23:39:32,327 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:39:33,725 WARN L205 SmtUtils]: Spent 239.00 ms on a formula simplification that was a NOOP. DAG size: 59 [2021-03-10 23:39:34,262 WARN L205 SmtUtils]: Spent 180.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 34 [2021-03-10 23:39:35,345 WARN L205 SmtUtils]: Spent 184.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 35 [2021-03-10 23:39:35,692 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 51 [2021-03-10 23:39:36,411 WARN L205 SmtUtils]: Spent 348.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 23:39:36,809 WARN L205 SmtUtils]: Spent 163.00 ms on a formula simplification that was a NOOP. DAG size: 54 [2021-03-10 23:39:37,120 WARN L205 SmtUtils]: Spent 141.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:39:37,389 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-10 23:39:38,027 WARN L205 SmtUtils]: Spent 107.00 ms on a formula simplification. DAG size of input: 39 DAG size of output: 30 [2021-03-10 23:39:38,640 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:39:39,674 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 46 DAG size of output: 37 [2021-03-10 23:39:40,077 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:39:40,380 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 15 [2021-03-10 23:39:40,806 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 35 [2021-03-10 23:39:41,214 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:39:42,726 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:39:43,534 WARN L205 SmtUtils]: Spent 218.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 36 [2021-03-10 23:39:43,960 WARN L205 SmtUtils]: Spent 155.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:39:45,171 WARN L205 SmtUtils]: Spent 251.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2021-03-10 23:39:45,462 WARN L205 SmtUtils]: Spent 124.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:39:45,714 WARN L205 SmtUtils]: Spent 132.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:39:46,296 WARN L205 SmtUtils]: Spent 111.00 ms on a formula simplification that was a NOOP. DAG size: 19 [2021-03-10 23:39:46,803 WARN L205 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:39:47,190 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 28 [2021-03-10 23:39:47,827 WARN L205 SmtUtils]: Spent 327.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 51 [2021-03-10 23:39:48,165 WARN L205 SmtUtils]: Spent 149.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:39:48,889 WARN L205 SmtUtils]: Spent 221.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 45 [2021-03-10 23:39:49,876 WARN L205 SmtUtils]: Spent 476.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2021-03-10 23:39:50,218 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:39:50,562 WARN L205 SmtUtils]: Spent 178.00 ms on a formula simplification that was a NOOP. DAG size: 31 [2021-03-10 23:39:52,291 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 23 [2021-03-10 23:39:52,790 WARN L205 SmtUtils]: Spent 271.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-03-10 23:39:53,424 WARN L205 SmtUtils]: Spent 205.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:39:54,583 WARN L205 SmtUtils]: Spent 386.00 ms on a formula simplification. DAG size of input: 49 DAG size of output: 40 [2021-03-10 23:39:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:39:55,536 INFO L93 Difference]: Finished difference Result 16708 states and 42036 transitions. [2021-03-10 23:39:55,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-03-10 23:39:55,543 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-03-10 23:39:55,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:39:55,566 INFO L225 Difference]: With dead ends: 16708 [2021-03-10 23:39:55,567 INFO L226 Difference]: Without dead ends: 16676 [2021-03-10 23:39:55,567 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2130 ImplicationChecksByTransitivity, 23935.0ms TimeCoverageRelationStatistics Valid=911, Invalid=6061, Unknown=0, NotChecked=0, Total=6972 [2021-03-10 23:39:55,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16676 states. [2021-03-10 23:39:55,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16676 to 13413. [2021-03-10 23:39:55,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13413 states, 13412 states have (on average 2.5778407396361467) internal successors, (34574), 13412 states have internal predecessors, (34574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:55,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13413 states to 13413 states and 34574 transitions. [2021-03-10 23:39:55,791 INFO L78 Accepts]: Start accepts. Automaton has 13413 states and 34574 transitions. Word has length 34 [2021-03-10 23:39:55,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:39:55,791 INFO L480 AbstractCegarLoop]: Abstraction has 13413 states and 34574 transitions. [2021-03-10 23:39:55,791 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.90625) internal successors, (61), 31 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:39:55,791 INFO L276 IsEmpty]: Start isEmpty. Operand 13413 states and 34574 transitions. [2021-03-10 23:39:55,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:39:55,802 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:39:55,802 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:39:56,007 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1528,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:56,007 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:39:56,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:39:56,008 INFO L82 PathProgramCache]: Analyzing trace with hash -750371481, now seen corresponding path program 124 times [2021-03-10 23:39:56,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:39:56,008 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506383557] [2021-03-10 23:39:56,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:39:56,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:39:56,971 WARN L205 SmtUtils]: Spent 181.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:39:57,365 WARN L205 SmtUtils]: Spent 195.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:39:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:39:57,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506383557] [2021-03-10 23:39:57,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276911228] [2021-03-10 23:39:57,831 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:39:57,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-03-10 23:39:57,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:39:57,852 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:39:57,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:00,179 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,182 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:00,187 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,192 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,197 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,208 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,217 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:00,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,228 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,230 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:00,236 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,252 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,255 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:00,259 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:00,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:00,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:40:00,278 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:00,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:00,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:00,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:40:00,489 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:00,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:00,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-03-10 23:40:00,489 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335053736] [2021-03-10 23:40:00,490 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:40:00,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:00,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:40:00,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=608, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:40:00,490 INFO L87 Difference]: Start difference. First operand 13413 states and 34574 transitions. Second operand has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-03-10 23:40:00,904 WARN L205 SmtUtils]: Spent 134.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:40:01,306 WARN L205 SmtUtils]: Spent 272.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 23 [2021-03-10 23:40:01,656 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-10 23:40:02,251 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:40:02,602 WARN L205 SmtUtils]: Spent 177.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:40:02,964 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:40:03,497 WARN L205 SmtUtils]: Spent 307.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 33 [2021-03-10 23:40:04,306 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:40:04,582 WARN L205 SmtUtils]: Spent 102.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-10 23:40:04,796 WARN L205 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2021-03-10 23:40:05,165 WARN L205 SmtUtils]: Spent 236.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-10 23:40:05,911 WARN L205 SmtUtils]: Spent 148.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:40:06,151 WARN L205 SmtUtils]: Spent 139.00 ms on a formula simplification that was a NOOP. DAG size: 20 [2021-03-10 23:40:06,632 WARN L205 SmtUtils]: Spent 215.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2021-03-10 23:40:07,501 WARN L205 SmtUtils]: Spent 320.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 28 [2021-03-10 23:40:07,824 WARN L205 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:40:08,119 WARN L205 SmtUtils]: Spent 210.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 21 [2021-03-10 23:40:08,725 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 23:40:09,098 WARN L205 SmtUtils]: Spent 143.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:40:09,790 WARN L205 SmtUtils]: Spent 165.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 32 [2021-03-10 23:40:10,319 WARN L205 SmtUtils]: Spent 298.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 38 [2021-03-10 23:40:11,006 WARN L205 SmtUtils]: Spent 169.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 34 [2021-03-10 23:40:11,453 WARN L205 SmtUtils]: Spent 293.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 41 [2021-03-10 23:40:11,986 WARN L205 SmtUtils]: Spent 211.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:40:12,737 WARN L205 SmtUtils]: Spent 325.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 45 [2021-03-10 23:40:13,214 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 45 DAG size of output: 42 [2021-03-10 23:40:13,750 WARN L205 SmtUtils]: Spent 190.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:40:14,470 WARN L205 SmtUtils]: Spent 192.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:40:14,959 WARN L205 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 20 [2021-03-10 23:40:15,186 WARN L205 SmtUtils]: Spent 100.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:40:15,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:15,548 INFO L93 Difference]: Finished difference Result 15587 states and 39936 transitions. [2021-03-10 23:40:15,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-03-10 23:40:15,556 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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 34 [2021-03-10 23:40:15,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:15,580 INFO L225 Difference]: With dead ends: 15587 [2021-03-10 23:40:15,580 INFO L226 Difference]: Without dead ends: 15556 [2021-03-10 23:40:15,581 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 11809.0ms TimeCoverageRelationStatistics Valid=494, Invalid=2812, Unknown=0, NotChecked=0, Total=3306 [2021-03-10 23:40:15,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15556 states. [2021-03-10 23:40:15,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15556 to 13663. [2021-03-10 23:40:15,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13663 states, 13662 states have (on average 2.5630215195432586) internal successors, (35016), 13662 states have internal predecessors, (35016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:15,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13663 states to 13663 states and 35016 transitions. [2021-03-10 23:40:15,814 INFO L78 Accepts]: Start accepts. Automaton has 13663 states and 35016 transitions. Word has length 34 [2021-03-10 23:40:15,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:15,814 INFO L480 AbstractCegarLoop]: Abstraction has 13663 states and 35016 transitions. [2021-03-10 23:40:15,814 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 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) [2021-03-10 23:40:15,814 INFO L276 IsEmpty]: Start isEmpty. Operand 13663 states and 35016 transitions. [2021-03-10 23:40:15,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:40:15,825 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:15,825 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:16,031 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable2927 [2021-03-10 23:40:16,031 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:16,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:16,032 INFO L82 PathProgramCache]: Analyzing trace with hash 192014503, now seen corresponding path program 125 times [2021-03-10 23:40:16,032 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:16,032 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532434296] [2021-03-10 23:40:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:16,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:17,046 WARN L205 SmtUtils]: Spent 176.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 16 [2021-03-10 23:40:17,416 WARN L205 SmtUtils]: Spent 182.00 ms on a formula simplification. DAG size of input: 25 DAG size of output: 20 [2021-03-10 23:40:17,693 WARN L205 SmtUtils]: Spent 203.00 ms on a formula simplification. DAG size of input: 31 DAG size of output: 20 [2021-03-10 23:40:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 13 proven. 37 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:18,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532434296] [2021-03-10 23:40:18,048 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292023556] [2021-03-10 23:40:18,048 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:18,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-03-10 23:40:18,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:18,078 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 43 conjunts are in the unsatisfiable core [2021-03-10 23:40:18,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:20,216 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,221 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,230 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,234 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,237 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:20,241 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,246 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,255 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,261 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,265 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,267 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:20,272 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,278 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:20,283 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,289 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:20,291 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:20,293 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:20,296 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 10 disjoint index pairs (out of 45 index pairs), introduced 5 new quantified variables, introduced 0 case distinctions, treesize of input 85 treesize of output 7 [2021-03-10 23:40:20,304 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-03-10 23:40:20,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:20,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-03-10 23:40:20,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:91, output treesize:7 [2021-03-10 23:40:20,533 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:20,533 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-03-10 23:40:20,533 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 14] total 26 [2021-03-10 23:40:20,533 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300880570] [2021-03-10 23:40:20,533 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-03-10 23:40:20,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-03-10 23:40:20,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-03-10 23:40:20,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=615, Unknown=0, NotChecked=0, Total=702 [2021-03-10 23:40:20,534 INFO L87 Difference]: Start difference. First operand 13663 states and 35016 transitions. Second operand has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:20,880 WARN L205 SmtUtils]: Spent 109.00 ms on a formula simplification. DAG size of input: 17 DAG size of output: 16 [2021-03-10 23:40:21,221 WARN L205 SmtUtils]: Spent 144.00 ms on a formula simplification. DAG size of input: 23 DAG size of output: 17 [2021-03-10 23:40:21,685 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 24 [2021-03-10 23:40:22,043 WARN L205 SmtUtils]: Spent 183.00 ms on a formula simplification that was a NOOP. DAG size: 26 [2021-03-10 23:40:22,377 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 35 DAG size of output: 27 [2021-03-10 23:40:22,853 WARN L205 SmtUtils]: Spent 246.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:40:23,240 WARN L205 SmtUtils]: Spent 244.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:40:23,650 WARN L205 SmtUtils]: Spent 263.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 34 [2021-03-10 23:40:24,110 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification that was a NOOP. DAG size: 21 [2021-03-10 23:40:24,697 WARN L205 SmtUtils]: Spent 127.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 26 [2021-03-10 23:40:25,096 WARN L205 SmtUtils]: Spent 147.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:40:25,562 WARN L205 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 34 [2021-03-10 23:40:25,959 WARN L205 SmtUtils]: Spent 145.00 ms on a formula simplification that was a NOOP. DAG size: 24 [2021-03-10 23:40:26,719 WARN L205 SmtUtils]: Spent 219.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:40:27,007 WARN L205 SmtUtils]: Spent 199.00 ms on a formula simplification that was a NOOP. DAG size: 30 [2021-03-10 23:40:27,223 WARN L205 SmtUtils]: Spent 122.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2021-03-10 23:40:27,424 WARN L205 SmtUtils]: Spent 117.00 ms on a formula simplification that was a NOOP. DAG size: 27 [2021-03-10 23:40:27,901 WARN L205 SmtUtils]: Spent 173.00 ms on a formula simplification. DAG size of input: 41 DAG size of output: 22 [2021-03-10 23:40:28,708 WARN L205 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 48 DAG size of output: 30 [2021-03-10 23:40:28,992 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 29 [2021-03-10 23:40:29,267 WARN L205 SmtUtils]: Spent 167.00 ms on a formula simplification. DAG size of input: 27 DAG size of output: 21 [2021-03-10 23:40:29,874 WARN L205 SmtUtils]: Spent 137.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 33 [2021-03-10 23:40:30,140 WARN L205 SmtUtils]: Spent 121.00 ms on a formula simplification that was a NOOP. DAG size: 32 [2021-03-10 23:40:30,641 WARN L205 SmtUtils]: Spent 265.00 ms on a formula simplification. DAG size of input: 44 DAG size of output: 40 [2021-03-10 23:40:31,337 WARN L205 SmtUtils]: Spent 156.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 33 [2021-03-10 23:40:31,968 WARN L205 SmtUtils]: Spent 152.00 ms on a formula simplification. DAG size of input: 47 DAG size of output: 34 [2021-03-10 23:40:32,396 WARN L205 SmtUtils]: Spent 275.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 41 [2021-03-10 23:40:32,844 WARN L205 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 53 DAG size of output: 43 [2021-03-10 23:40:33,260 WARN L205 SmtUtils]: Spent 175.00 ms on a formula simplification. DAG size of input: 42 DAG size of output: 39 [2021-03-10 23:40:34,315 WARN L205 SmtUtils]: Spent 204.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 39 [2021-03-10 23:40:34,837 WARN L205 SmtUtils]: Spent 333.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 45 [2021-03-10 23:40:35,359 WARN L205 SmtUtils]: Spent 356.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 48 [2021-03-10 23:40:36,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-03-10 23:40:36,649 INFO L93 Difference]: Finished difference Result 16521 states and 42023 transitions. [2021-03-10 23:40:36,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-03-10 23:40:36,656 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 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 34 [2021-03-10 23:40:36,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-03-10 23:40:36,676 INFO L225 Difference]: With dead ends: 16521 [2021-03-10 23:40:36,676 INFO L226 Difference]: Without dead ends: 16495 [2021-03-10 23:40:36,677 INFO L775 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 13150.3ms TimeCoverageRelationStatistics Valid=532, Invalid=3128, Unknown=0, NotChecked=0, Total=3660 [2021-03-10 23:40:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16495 states. [2021-03-10 23:40:36,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16495 to 13801. [2021-03-10 23:40:36,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13801 states, 13800 states have (on average 2.5693478260869567) internal successors, (35457), 13800 states have internal predecessors, (35457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:36,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13801 states to 13801 states and 35457 transitions. [2021-03-10 23:40:36,927 INFO L78 Accepts]: Start accepts. Automaton has 13801 states and 35457 transitions. Word has length 34 [2021-03-10 23:40:36,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-03-10 23:40:36,927 INFO L480 AbstractCegarLoop]: Abstraction has 13801 states and 35457 transitions. [2021-03-10 23:40:36,927 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-03-10 23:40:36,927 INFO L276 IsEmpty]: Start isEmpty. Operand 13801 states and 35457 transitions. [2021-03-10 23:40:36,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-03-10 23:40:36,937 INFO L511 BasicCegarLoop]: Found error trace [2021-03-10 23:40:36,937 INFO L519 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-03-10 23:40:37,137 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2928,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:37,138 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-03-10 23:40:37,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-03-10 23:40:37,138 INFO L82 PathProgramCache]: Analyzing trace with hash 857721255, now seen corresponding path program 126 times [2021-03-10 23:40:37,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-03-10 23:40:37,138 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125501273] [2021-03-10 23:40:37,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-03-10 23:40:37,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-03-10 23:40:38,019 WARN L205 SmtUtils]: Spent 170.00 ms on a formula simplification. DAG size of input: 24 DAG size of output: 16 [2021-03-10 23:40:38,526 WARN L205 SmtUtils]: Spent 171.00 ms on a formula simplification. DAG size of input: 26 DAG size of output: 24 [2021-03-10 23:40:38,909 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 16 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-03-10 23:40:38,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125501273] [2021-03-10 23:40:38,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1786989810] [2021-03-10 23:40:38,909 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:38,931 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-03-10 23:40:38,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-03-10 23:40:38,932 WARN L261 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 47 conjunts are in the unsatisfiable core [2021-03-10 23:40:38,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-03-10 23:40:47,537 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,554 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,562 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:47,573 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,621 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,626 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,670 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,685 INFO L173 IndexEqualityManager]: detected equality via solver [2021-03-10 23:40:47,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-03-10 23:40:47,708 INFO L244 Elim1Store]: Index analysis took 196 ms [2021-03-10 23:40:48,470 WARN L205 SmtUtils]: Spent 759.00 ms on a formula simplification that was a NOOP. DAG size: 103 [2021-03-10 23:40:48,472 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-03-10 23:40:48,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 7 disjoint index pairs (out of 45 index pairs), introduced 8 new quantified variables, introduced 33 case distinctions, treesize of input 89 treesize of output 241 [2021-03-10 23:40:53,762 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 1405 DAG size of output: 1316 [2021-03-10 23:40:53,908 WARN L205 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 1405 DAG size of output: 1316 [2021-03-10 23:40:54,028 WARN L205 SmtUtils]: Spent 112.00 ms on a formula simplification. DAG size of input: 1411 DAG size of output: 1322 [2021-03-10 23:40:54,282 WARN L205 SmtUtils]: Spent 242.00 ms on a formula simplification. DAG size of input: 1324 DAG size of output: 1875 Received shutdown request... [2021-03-10 23:40:58,549 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2929,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-03-10 23:40:58,549 WARN L545 AbstractCegarLoop]: Verification canceled [2021-03-10 23:40:58,553 WARN L224 ceAbstractionStarter]: Timeout [2021-03-10 23:40:58,553 INFO L202 PluginConnector]: Adding new model counter-queue.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 10.03 11:40:58 BasicIcfg [2021-03-10 23:40:58,553 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-03-10 23:40:58,554 INFO L168 Benchmark]: Toolchain (without parser) took 829515.57 ms. Allocated memory was 255.9 MB in the beginning and 755.0 MB in the end (delta: 499.1 MB). Free memory was 236.7 MB in the beginning and 180.9 MB in the end (delta: 55.8 MB). Peak memory consumption was 641.2 MB. Max. memory is 16.0 GB. [2021-03-10 23:40:58,554 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 171.6 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-03-10 23:40:58,554 INFO L168 Benchmark]: Boogie Procedure Inliner took 18.94 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:40:58,554 INFO L168 Benchmark]: Boogie Preprocessor took 14.22 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 835.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-03-10 23:40:58,554 INFO L168 Benchmark]: RCFGBuilder took 292.38 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.0 GB. [2021-03-10 23:40:58,554 INFO L168 Benchmark]: TraceAbstraction took 829180.51 ms. Allocated memory was 255.9 MB in the beginning and 755.0 MB in the end (delta: 499.1 MB). Free memory was 236.0 MB in the beginning and 180.9 MB in the end (delta: 55.1 MB). Peak memory consumption was 639.5 MB. Max. memory is 16.0 GB. [2021-03-10 23:40:58,554 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory was 237.8 MB in the beginning and 237.6 MB in the end (delta: 171.6 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 18.94 ms. Allocated memory is still 255.9 MB. Free memory was 236.2 MB in the beginning and 234.7 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 14.22 ms. Allocated memory is still 255.9 MB. Free memory was 234.7 MB in the beginning and 233.8 MB in the end (delta: 835.5 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 292.38 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.0 MB in the end (delta: -2.3 MB). Peak memory consumption was 16.4 MB. Max. memory is 16.0 GB. * TraceAbstraction took 829180.51 ms. Allocated memory was 255.9 MB in the beginning and 755.0 MB in the end (delta: 499.1 MB). Free memory was 236.0 MB in the beginning and 180.9 MB in the end (delta: 55.1 MB). Peak memory consumption was 639.5 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 50]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 50). Cancelled while BasicCegarLoop was analyzing trace of length 35 with TraceHistMax 5,while TraceCheckSpWp was constructing forward predicates,while PartialQuantifierElimination was eliminating quantifiers from formula with 0 quantifier alternations,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 21 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 829043.5ms, OverallIterations: 131, TraceHistogramMax: 5, EmptinessCheckTime: 547.1ms, AutomataDifference: 584827.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 22.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 3642 SDtfs, 25662 SDslu, 35887 SDs, 0 SdLazy, 79886 SolverSat, 7630 SolverUnsat, 4 SolverUnknown, 0 SolverNotchecked, 114104.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 9069 GetRequests, 2382 SyntacticMatches, 224 SemanticMatches, 6463 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109710 ImplicationChecksByTransitivity, 496012.2ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=13801occurred in iteration=130, InterpolantAutomatonStates: 5067, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 7946.8ms AutomataMinimizationTime, 130 MinimizatonAttempts, 123734 StatesRemovedByMinimization, 130 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 377.9ms SsaConstructionTime, 1480.0ms SatisfiabilityAnalysisTime, 184124.5ms InterpolantComputationTime, 7226 NumberOfCodeBlocks, 7226 NumberOfCodeBlocksAsserted, 553 NumberOfCheckSat, 6970 ConstructedInterpolants, 333 QuantifiedInterpolants, 125313 SizeOfPredicates, 436 NumberOfNonLiveVariables, 8073 ConjunctsInSsa, 3011 ConjunctsInUnsatCore, 256 InterpolantComputations, 4 PerfectInterpolantSequences, 1421/7181 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown