/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-a865e3bea3ade1065a4c95009cfa501fe03c5538-a865e3b [2021-02-19 18:24:37,352 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-02-19 18:24:37,354 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-02-19 18:24:37,392 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-02-19 18:24:37,449 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 [2021-02-19 18:24:37,485 INFO L113 SettingsManager]: Loading preferences was successful [2021-02-19 18:24:37,485 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-02-19 18:24:37,485 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-02-19 18:24:37,485 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-02-19 18:24:37,488 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-02-19 18:24:37,488 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-02-19 18:24:37,488 INFO L138 SettingsManager]: * Use SBE=true [2021-02-19 18:24:37,489 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-02-19 18:24:37,489 INFO L138 SettingsManager]: * sizeof long=4 [2021-02-19 18:24:37,489 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-02-19 18:24:37,490 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-02-19 18:24:37,490 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-02-19 18:24:37,490 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-02-19 18:24:37,490 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-02-19 18:24:37,490 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-02-19 18:24:37,491 INFO L138 SettingsManager]: * sizeof long double=12 [2021-02-19 18:24:37,491 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-02-19 18:24:37,491 INFO L138 SettingsManager]: * Use constant arrays=true [2021-02-19 18:24:37,491 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-02-19 18:24:37,491 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-02-19 18:24:37,491 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-02-19 18:24:37,491 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-02-19 18:24:37,492 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-02-19 18:24:37,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-02-19 18:24:37,492 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-02-19 18:24:37,492 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-02-19 18:24:37,492 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-02-19 18:24:37,492 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-02-19 18:24:37,492 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-02-19 18:24:37,492 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-02-19 18:24:37,493 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-02-19 18:24:37,493 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-02-19 18:24:37,780 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-02-19 18:24:37,808 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-02-19 18:24:37,810 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-02-19 18:24:37,811 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-02-19 18:24:37,811 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-02-19 18:24:37,812 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl [2021-02-19 18:24:37,812 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/queue-add-2.wvr.bpl' [2021-02-19 18:24:37,835 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-02-19 18:24:37,838 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-02-19 18:24:37,840 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-02-19 18:24:37,840 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-02-19 18:24:37,840 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-02-19 18:24:37,850 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,857 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,864 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-02-19 18:24:37,865 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-02-19 18:24:37,865 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-02-19 18:24:37,866 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-02-19 18:24:37,871 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,875 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,877 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,877 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/1) ... [2021-02-19 18:24:37,878 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-02-19 18:24:37,879 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-02-19 18:24:37,879 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-02-19 18:24:37,879 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-02-19 18:24:37,881 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (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 [2021-02-19 18:24:37,926 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-02-19 18:24:37,926 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-02-19 18:24:37,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-02-19 18:24:37,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-02-19 18:24:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-02-19 18:24:37,927 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-02-19 18:24:37,927 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-02-19 18:24:37,927 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-02-19 18:24:37,927 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-02-19 18:24:37,928 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-02-19 18:24:38,185 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-02-19 18:24:38,185 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-02-19 18:24:38,186 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:24:38 BoogieIcfgContainer [2021-02-19 18:24:38,186 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-02-19 18:24:38,188 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-02-19 18:24:38,188 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-02-19 18:24:38,190 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-02-19 18:24:38,190 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 19.02 06:24:37" (1/2) ... [2021-02-19 18:24:38,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3f71ae00 and model type queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.02 06:24:38, skipping insertion in model container [2021-02-19 18:24:38,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.02 06:24:38" (2/2) ... [2021-02-19 18:24:38,191 INFO L111 eAbstractionObserver]: Analyzing ICFG queue-add-2.wvr.bpl [2021-02-19 18:24:38,195 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-02-19 18:24:38,195 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-02-19 18:24:38,214 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2021-02-19 18:24:38,215 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-02-19 18:24:38,268 INFO L149 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-02-19 18:24:38,281 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-02-19 18:24:38,307 INFO L376 AbstractCegarLoop]: Interprodecural is true [2021-02-19 18:24:38,307 INFO L377 AbstractCegarLoop]: Hoare is true [2021-02-19 18:24:38,307 INFO L378 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-02-19 18:24:38,308 INFO L379 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-02-19 18:24:38,308 INFO L380 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-02-19 18:24:38,308 INFO L381 AbstractCegarLoop]: Difference is false [2021-02-19 18:24:38,308 INFO L382 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-02-19 18:24:38,308 INFO L386 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-02-19 18:24:38,319 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 31 places, 26 transitions, 68 flow [2021-02-19 18:24:38,335 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:38,337 INFO L276 IsEmpty]: Start isEmpty. Operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:38,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-02-19 18:24:38,344 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:38,345 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:38,345 INFO L428 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:38,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:38,351 INFO L82 PathProgramCache]: Analyzing trace with hash -298257361, now seen corresponding path program 1 times [2021-02-19 18:24:38,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:38,358 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790222428] [2021-02-19 18:24:38,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:38,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:38,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:38,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790222428] [2021-02-19 18:24:38,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:24:38,487 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-02-19 18:24:38,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732695113] [2021-02-19 18:24:38,491 INFO L460 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-02-19 18:24:38,491 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:38,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-02-19 18:24:38,502 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:24:38,503 INFO L87 Difference]: Start difference. First operand has 78 states, 76 states have (on average 1.9605263157894737) internal successors, (149), 77 states have internal predecessors, (149), 0 states have call successors, (0), 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 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:38,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:38,539 INFO L93 Difference]: Finished difference Result 84 states and 163 transitions. [2021-02-19 18:24:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-02-19 18:24:38,540 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-02-19 18:24:38,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:38,551 INFO L225 Difference]: With dead ends: 84 [2021-02-19 18:24:38,551 INFO L226 Difference]: Without dead ends: 84 [2021-02-19 18:24:38,552 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-02-19 18:24:38,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-02-19 18:24:38,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-02-19 18:24:38,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.963855421686747) internal successors, (163), 83 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:38,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 163 transitions. [2021-02-19 18:24:38,595 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 163 transitions. Word has length 15 [2021-02-19 18:24:38,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:38,596 INFO L480 AbstractCegarLoop]: Abstraction has 84 states and 163 transitions. [2021-02-19 18:24:38,596 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:38,596 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 163 transitions. [2021-02-19 18:24:38,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:24:38,598 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:38,598 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:38,599 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-02-19 18:24:38,599 INFO L428 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:38,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:38,602 INFO L82 PathProgramCache]: Analyzing trace with hash 800493516, now seen corresponding path program 1 times [2021-02-19 18:24:38,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:38,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506587358] [2021-02-19 18:24:38,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:38,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506587358] [2021-02-19 18:24:38,850 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562839487] [2021-02-19 18:24:38,850 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 [2021-02-19 18:24:38,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:38,888 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 18:24:38,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:39,137 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:39,137 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 15 [2021-02-19 18:24:39,138 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225456503] [2021-02-19 18:24:39,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-02-19 18:24:39,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:39,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-02-19 18:24:39,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-02-19 18:24:39,140 INFO L87 Difference]: Start difference. First operand 84 states and 163 transitions. Second operand has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:39,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:39,380 INFO L93 Difference]: Finished difference Result 167 states and 303 transitions. [2021-02-19 18:24:39,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-02-19 18:24:39,381 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:24:39,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:39,385 INFO L225 Difference]: With dead ends: 167 [2021-02-19 18:24:39,385 INFO L226 Difference]: Without dead ends: 132 [2021-02-19 18:24:39,386 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=127, Invalid=379, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:39,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-02-19 18:24:39,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 92. [2021-02-19 18:24:39,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.956043956043956) internal successors, (178), 91 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:39,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 178 transitions. [2021-02-19 18:24:39,405 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 178 transitions. Word has length 19 [2021-02-19 18:24:39,405 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:39,405 INFO L480 AbstractCegarLoop]: Abstraction has 92 states and 178 transitions. [2021-02-19 18:24:39,405 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.3125) internal successors, (37), 15 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:39,405 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 178 transitions. [2021-02-19 18:24:39,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:24:39,406 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:39,406 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:39,628 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-02-19 18:24:39,628 INFO L428 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:39,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:39,629 INFO L82 PathProgramCache]: Analyzing trace with hash -420413942, now seen corresponding path program 2 times [2021-02-19 18:24:39,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:39,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224330565] [2021-02-19 18:24:39,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:39,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:39,768 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:39,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224330565] [2021-02-19 18:24:39,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077570426] [2021-02-19 18:24:39,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:39,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:39,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:39,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 18:24:39,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:40,003 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:40,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:40,004 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-02-19 18:24:40,004 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027086063] [2021-02-19 18:24:40,005 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:24:40,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:40,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:24:40,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:24:40,011 INFO L87 Difference]: Start difference. First operand 92 states and 178 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:40,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:40,245 INFO L93 Difference]: Finished difference Result 167 states and 305 transitions. [2021-02-19 18:24:40,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:24:40,246 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:24:40,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:40,249 INFO L225 Difference]: With dead ends: 167 [2021-02-19 18:24:40,254 INFO L226 Difference]: Without dead ends: 139 [2021-02-19 18:24:40,256 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2021-02-19 18:24:40,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-02-19 18:24:40,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 95. [2021-02-19 18:24:40,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.946808510638298) internal successors, (183), 94 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:40,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 183 transitions. [2021-02-19 18:24:40,265 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 183 transitions. Word has length 19 [2021-02-19 18:24:40,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:40,265 INFO L480 AbstractCegarLoop]: Abstraction has 95 states and 183 transitions. [2021-02-19 18:24:40,265 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:40,265 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 183 transitions. [2021-02-19 18:24:40,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-02-19 18:24:40,266 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:40,266 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:40,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:40,467 INFO L428 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:40,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:40,467 INFO L82 PathProgramCache]: Analyzing trace with hash 1822304704, now seen corresponding path program 3 times [2021-02-19 18:24:40,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:40,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103222999] [2021-02-19 18:24:40,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:40,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:40,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103222999] [2021-02-19 18:24:40,584 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224744749] [2021-02-19 18:24:40,584 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:40,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:24:40,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:40,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 18:24:40,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:40,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:40,768 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:40,768 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 14 [2021-02-19 18:24:40,768 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112532564] [2021-02-19 18:24:40,768 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:24:40,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:40,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:24:40,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:24:40,769 INFO L87 Difference]: Start difference. First operand 95 states and 183 transitions. Second operand has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:41,045 INFO L93 Difference]: Finished difference Result 141 states and 262 transitions. [2021-02-19 18:24:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-02-19 18:24:41,047 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-02-19 18:24:41,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:41,048 INFO L225 Difference]: With dead ends: 141 [2021-02-19 18:24:41,049 INFO L226 Difference]: Without dead ends: 113 [2021-02-19 18:24:41,049 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2021-02-19 18:24:41,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-02-19 18:24:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 89. [2021-02-19 18:24:41,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.9318181818181819) internal successors, (170), 88 states have internal predecessors, (170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:41,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 170 transitions. [2021-02-19 18:24:41,059 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 170 transitions. Word has length 19 [2021-02-19 18:24:41,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:41,060 INFO L480 AbstractCegarLoop]: Abstraction has 89 states and 170 transitions. [2021-02-19 18:24:41,060 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 2.466666666666667) internal successors, (37), 14 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:41,060 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 170 transitions. [2021-02-19 18:24:41,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-02-19 18:24:41,064 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:41,065 INFO L506 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:41,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:41,287 INFO L428 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:41,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:41,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1142032855, now seen corresponding path program 1 times [2021-02-19 18:24:41,287 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:41,287 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516059993] [2021-02-19 18:24:41,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:41,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:41,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:41,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516059993] [2021-02-19 18:24:41,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326391765] [2021-02-19 18:24:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:41,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:41,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 48 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:24:41,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:41,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:41,440 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:41,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:41,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:41,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:11, output treesize:3 [2021-02-19 18:24:41,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:41,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:41,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-02-19 18:24:41,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678480124] [2021-02-19 18:24:41,461 INFO L460 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-02-19 18:24:41,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:41,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-02-19 18:24:41,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-02-19 18:24:41,462 INFO L87 Difference]: Start difference. First operand 89 states and 170 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2021-02-19 18:24:41,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:41,527 INFO L93 Difference]: Finished difference Result 124 states and 240 transitions. [2021-02-19 18:24:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-02-19 18:24:41,528 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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 [2021-02-19 18:24:41,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:41,529 INFO L225 Difference]: With dead ends: 124 [2021-02-19 18:24:41,529 INFO L226 Difference]: Without dead ends: 124 [2021-02-19 18:24:41,530 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:24:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-02-19 18:24:41,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 117. [2021-02-19 18:24:41,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.9482758620689655) internal successors, (226), 116 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:41,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 226 transitions. [2021-02-19 18:24:41,534 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 226 transitions. Word has length 22 [2021-02-19 18:24:41,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:41,535 INFO L480 AbstractCegarLoop]: Abstraction has 117 states and 226 transitions. [2021-02-19 18:24:41,535 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 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) [2021-02-19 18:24:41,535 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 226 transitions. [2021-02-19 18:24:41,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:41,536 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:41,536 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:41,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:41,750 INFO L428 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:41,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:41,750 INFO L82 PathProgramCache]: Analyzing trace with hash 574394740, now seen corresponding path program 2 times [2021-02-19 18:24:41,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:41,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915101776] [2021-02-19 18:24:41,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:41,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:41,940 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915101776] [2021-02-19 18:24:41,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650738334] [2021-02-19 18:24:41,940 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:24:41,961 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:41,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:41,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:41,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:42,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:42,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:42,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:42,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:42,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 18:24:42,165 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:42,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:42,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 18 [2021-02-19 18:24:42,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342410278] [2021-02-19 18:24:42,166 INFO L460 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-02-19 18:24:42,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:42,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-02-19 18:24:42,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-02-19 18:24:42,167 INFO L87 Difference]: Start difference. First operand 117 states and 226 transitions. Second operand has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-02-19 18:24:42,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:42,690 INFO L93 Difference]: Finished difference Result 213 states and 403 transitions. [2021-02-19 18:24:42,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:24:42,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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 26 [2021-02-19 18:24:42,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:42,691 INFO L225 Difference]: With dead ends: 213 [2021-02-19 18:24:42,692 INFO L226 Difference]: Without dead ends: 204 [2021-02-19 18:24:42,692 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:24:42,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-02-19 18:24:42,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 148. [2021-02-19 18:24:42,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.9251700680272108) internal successors, (283), 147 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:42,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 283 transitions. [2021-02-19 18:24:42,697 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 283 transitions. Word has length 26 [2021-02-19 18:24:42,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:42,697 INFO L480 AbstractCegarLoop]: Abstraction has 148 states and 283 transitions. [2021-02-19 18:24:42,698 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.1052631578947367) internal successors, (40), 18 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) [2021-02-19 18:24:42,698 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 283 transitions. [2021-02-19 18:24:42,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:42,698 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:42,698 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:42,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-02-19 18:24:42,914 INFO L428 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:42,914 INFO L82 PathProgramCache]: Analyzing trace with hash -1107709774, now seen corresponding path program 3 times [2021-02-19 18:24:42,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:42,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160467862] [2021-02-19 18:24:42,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:42,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:43,082 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:43,082 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160467862] [2021-02-19 18:24:43,083 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036407165] [2021-02-19 18:24:43,083 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:43,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:24:43,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:43,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:43,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:43,240 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:43,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:43,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:43,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:43,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 18:24:43,353 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:43,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:43,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:24:43,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105979014] [2021-02-19 18:24:43,355 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:24:43,355 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:43,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:24:43,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:24:43,356 INFO L87 Difference]: Start difference. First operand 148 states and 283 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-02-19 18:24:43,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:43,945 INFO L93 Difference]: Finished difference Result 249 states and 472 transitions. [2021-02-19 18:24:43,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:24:43,946 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 26 [2021-02-19 18:24:43,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:43,948 INFO L225 Difference]: With dead ends: 249 [2021-02-19 18:24:43,948 INFO L226 Difference]: Without dead ends: 240 [2021-02-19 18:24:43,948 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:24:43,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-02-19 18:24:43,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 154. [2021-02-19 18:24:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.9477124183006536) internal successors, (298), 153 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 298 transitions. [2021-02-19 18:24:43,957 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 298 transitions. Word has length 26 [2021-02-19 18:24:43,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:43,959 INFO L480 AbstractCegarLoop]: Abstraction has 154 states and 298 transitions. [2021-02-19 18:24:43,959 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-02-19 18:24:43,959 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 298 transitions. [2021-02-19 18:24:43,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:43,960 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:43,960 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:44,181 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:44,182 INFO L428 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:44,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:44,182 INFO L82 PathProgramCache]: Analyzing trace with hash 1200262004, now seen corresponding path program 4 times [2021-02-19 18:24:44,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:44,182 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566713493] [2021-02-19 18:24:44,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:44,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:44,361 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566713493] [2021-02-19 18:24:44,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1270763906] [2021-02-19 18:24:44,362 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:44,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:24:44,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:44,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:44,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:44,489 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:44,491 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:44,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:44,496 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:44,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 18:24:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:44,643 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:44,644 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:24:44,644 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608244014] [2021-02-19 18:24:44,644 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:24:44,644 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:44,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:24:44,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=399, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:24:44,647 INFO L87 Difference]: Start difference. First operand 154 states and 298 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-02-19 18:24:45,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:45,237 INFO L93 Difference]: Finished difference Result 283 states and 535 transitions. [2021-02-19 18:24:45,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:24:45,237 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 26 [2021-02-19 18:24:45,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:45,239 INFO L225 Difference]: With dead ends: 283 [2021-02-19 18:24:45,239 INFO L226 Difference]: Without dead ends: 274 [2021-02-19 18:24:45,239 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:24:45,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 274 states. [2021-02-19 18:24:45,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 274 to 155. [2021-02-19 18:24:45,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.9545454545454546) internal successors, (301), 154 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:45,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 301 transitions. [2021-02-19 18:24:45,244 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 301 transitions. Word has length 26 [2021-02-19 18:24:45,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:45,244 INFO L480 AbstractCegarLoop]: Abstraction has 155 states and 301 transitions. [2021-02-19 18:24:45,244 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-02-19 18:24:45,244 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 301 transitions. [2021-02-19 18:24:45,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:45,245 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:45,245 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:45,466 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:45,466 INFO L428 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:45,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:45,466 INFO L82 PathProgramCache]: Analyzing trace with hash -1668462926, now seen corresponding path program 5 times [2021-02-19 18:24:45,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:45,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499060413] [2021-02-19 18:24:45,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:45,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:45,644 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499060413] [2021-02-19 18:24:45,645 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706056096] [2021-02-19 18:24:45,645 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:45,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:45,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:45,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:45,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:45,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 18:24:45,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:45,767 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:45,767 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:45,768 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-02-19 18:24:45,895 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:45,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:45,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 21 [2021-02-19 18:24:45,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27686180] [2021-02-19 18:24:45,898 INFO L460 AbstractCegarLoop]: Interpolant automaton has 22 states [2021-02-19 18:24:45,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:45,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-02-19 18:24:45,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2021-02-19 18:24:45,899 INFO L87 Difference]: Start difference. First operand 155 states and 301 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-02-19 18:24:46,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:46,683 INFO L93 Difference]: Finished difference Result 312 states and 596 transitions. [2021-02-19 18:24:46,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-02-19 18:24:46,684 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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 26 [2021-02-19 18:24:46,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:46,685 INFO L225 Difference]: With dead ends: 312 [2021-02-19 18:24:46,685 INFO L226 Difference]: Without dead ends: 303 [2021-02-19 18:24:46,686 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=191, Invalid=1369, Unknown=0, NotChecked=0, Total=1560 [2021-02-19 18:24:46,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-19 18:24:46,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 160. [2021-02-19 18:24:46,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.9811320754716981) internal successors, (315), 159 states have internal predecessors, (315), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:46,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 315 transitions. [2021-02-19 18:24:46,691 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 315 transitions. Word has length 26 [2021-02-19 18:24:46,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:46,691 INFO L480 AbstractCegarLoop]: Abstraction has 160 states and 315 transitions. [2021-02-19 18:24:46,691 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 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) [2021-02-19 18:24:46,692 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 315 transitions. [2021-02-19 18:24:46,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:46,692 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:46,692 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:46,906 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-02-19 18:24:46,906 INFO L428 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:46,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:46,906 INFO L82 PathProgramCache]: Analyzing trace with hash 1641410482, now seen corresponding path program 6 times [2021-02-19 18:24:46,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:46,907 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897018987] [2021-02-19 18:24:46,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:46,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:46,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:46,933 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897018987] [2021-02-19 18:24:46,933 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-02-19 18:24:46,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-02-19 18:24:46,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496010356] [2021-02-19 18:24:46,934 INFO L460 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-02-19 18:24:46,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:46,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-02-19 18:24:46,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:24:46,935 INFO L87 Difference]: Start difference. First operand 160 states and 315 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-02-19 18:24:46,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:46,946 INFO L93 Difference]: Finished difference Result 319 states and 616 transitions. [2021-02-19 18:24:46,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-02-19 18:24:46,947 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 26 [2021-02-19 18:24:46,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:46,949 INFO L225 Difference]: With dead ends: 319 [2021-02-19 18:24:46,949 INFO L226 Difference]: Without dead ends: 291 [2021-02-19 18:24:46,950 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-02-19 18:24:46,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-02-19 18:24:46,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 257. [2021-02-19 18:24:46,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 2.015625) internal successors, (516), 256 states have internal predecessors, (516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:46,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 516 transitions. [2021-02-19 18:24:46,957 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 516 transitions. Word has length 26 [2021-02-19 18:24:46,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:46,957 INFO L480 AbstractCegarLoop]: Abstraction has 257 states and 516 transitions. [2021-02-19 18:24:46,957 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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) [2021-02-19 18:24:46,957 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 516 transitions. [2021-02-19 18:24:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:46,958 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:46,958 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:46,958 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-02-19 18:24:46,958 INFO L428 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:46,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:46,958 INFO L82 PathProgramCache]: Analyzing trace with hash -1817617144, now seen corresponding path program 7 times [2021-02-19 18:24:46,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:46,959 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674251463] [2021-02-19 18:24:46,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:46,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:47,134 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:47,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674251463] [2021-02-19 18:24:47,134 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720340252] [2021-02-19 18:24:47,134 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 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 [2021-02-19 18:24:47,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:47,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:47,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:47,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:47,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:47,252 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:47,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:47,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 18:24:47,401 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:47,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:47,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:47,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058044778] [2021-02-19 18:24:47,402 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:47,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:47,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:47,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:47,403 INFO L87 Difference]: Start difference. First operand 257 states and 516 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:47,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:47,896 INFO L93 Difference]: Finished difference Result 321 states and 632 transitions. [2021-02-19 18:24:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:24:47,896 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 26 [2021-02-19 18:24:47,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:47,898 INFO L225 Difference]: With dead ends: 321 [2021-02-19 18:24:47,898 INFO L226 Difference]: Without dead ends: 293 [2021-02-19 18:24:47,898 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:24:47,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-02-19 18:24:47,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 260. [2021-02-19 18:24:47,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 2.011583011583012) internal successors, (521), 259 states have internal predecessors, (521), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:47,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 521 transitions. [2021-02-19 18:24:47,905 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 521 transitions. Word has length 26 [2021-02-19 18:24:47,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:47,905 INFO L480 AbstractCegarLoop]: Abstraction has 260 states and 521 transitions. [2021-02-19 18:24:47,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:47,905 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 521 transitions. [2021-02-19 18:24:47,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:47,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:47,906 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:48,121 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:48,122 INFO L428 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:48,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:48,122 INFO L82 PathProgramCache]: Analyzing trace with hash -2050681226, now seen corresponding path program 8 times [2021-02-19 18:24:48,122 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:48,122 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367267034] [2021-02-19 18:24:48,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:48,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:48,270 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:48,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367267034] [2021-02-19 18:24:48,270 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191594609] [2021-02-19 18:24:48,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:48,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:48,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:48,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:48,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:48,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 18:24:48,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:48,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:48,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:48,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:24, output treesize:13 [2021-02-19 18:24:48,531 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:48,532 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:48,532 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:48,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683804583] [2021-02-19 18:24:48,532 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:48,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:48,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:48,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:48,533 INFO L87 Difference]: Start difference. First operand 260 states and 521 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:49,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:49,023 INFO L93 Difference]: Finished difference Result 349 states and 677 transitions. [2021-02-19 18:24:49,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:24:49,024 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 26 [2021-02-19 18:24:49,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:49,025 INFO L225 Difference]: With dead ends: 349 [2021-02-19 18:24:49,025 INFO L226 Difference]: Without dead ends: 317 [2021-02-19 18:24:49,026 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:49,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2021-02-19 18:24:49,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 269. [2021-02-19 18:24:49,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 2.0186567164179103) internal successors, (541), 268 states have internal predecessors, (541), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:49,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 541 transitions. [2021-02-19 18:24:49,032 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 541 transitions. Word has length 26 [2021-02-19 18:24:49,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:49,032 INFO L480 AbstractCegarLoop]: Abstraction has 269 states and 541 transitions. [2021-02-19 18:24:49,032 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:49,032 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 541 transitions. [2021-02-19 18:24:49,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:49,033 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:49,033 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:49,246 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:49,246 INFO L428 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:49,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:49,246 INFO L82 PathProgramCache]: Analyzing trace with hash 257290552, now seen corresponding path program 9 times [2021-02-19 18:24:49,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:49,247 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234980514] [2021-02-19 18:24:49,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:49,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:49,406 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:49,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234980514] [2021-02-19 18:24:49,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074441857] [2021-02-19 18:24:49,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:49,427 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:24:49,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:49,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:49,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:49,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:49,525 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:49,530 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:49,530 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:49,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 18:24:49,647 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:49,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:49,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:49,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672575577] [2021-02-19 18:24:49,648 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:49,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:49,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:49,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:49,648 INFO L87 Difference]: Start difference. First operand 269 states and 541 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:50,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:50,198 INFO L93 Difference]: Finished difference Result 386 states and 744 transitions. [2021-02-19 18:24:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:24:50,198 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 26 [2021-02-19 18:24:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:50,200 INFO L225 Difference]: With dead ends: 386 [2021-02-19 18:24:50,200 INFO L226 Difference]: Without dead ends: 354 [2021-02-19 18:24:50,200 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 354 states. [2021-02-19 18:24:50,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 354 to 270. [2021-02-19 18:24:50,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 2.0185873605947955) internal successors, (543), 269 states have internal predecessors, (543), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:50,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 543 transitions. [2021-02-19 18:24:50,207 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 543 transitions. Word has length 26 [2021-02-19 18:24:50,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:50,207 INFO L480 AbstractCegarLoop]: Abstraction has 270 states and 543 transitions. [2021-02-19 18:24:50,208 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:50,208 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 543 transitions. [2021-02-19 18:24:50,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:50,208 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:50,208 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:50,409 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-02-19 18:24:50,409 INFO L428 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:50,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:50,410 INFO L82 PathProgramCache]: Analyzing trace with hash 1683532918, now seen corresponding path program 10 times [2021-02-19 18:24:50,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:50,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119824467] [2021-02-19 18:24:50,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:50,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:50,560 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:50,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119824467] [2021-02-19 18:24:50,561 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704650089] [2021-02-19 18:24:50,561 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 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 [2021-02-19 18:24:50,582 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:24:50,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:50,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:50,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:50,676 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:50,677 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:50,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:50,682 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:50,682 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 18:24:50,792 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:50,792 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:50,792 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:50,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722791378] [2021-02-19 18:24:50,792 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:50,792 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:50,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:50,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:50,793 INFO L87 Difference]: Start difference. First operand 270 states and 543 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:51,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:51,484 INFO L93 Difference]: Finished difference Result 429 states and 828 transitions. [2021-02-19 18:24:51,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:24:51,485 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 26 [2021-02-19 18:24:51,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:51,486 INFO L225 Difference]: With dead ends: 429 [2021-02-19 18:24:51,486 INFO L226 Difference]: Without dead ends: 397 [2021-02-19 18:24:51,487 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:24:51,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 397 states. [2021-02-19 18:24:51,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 397 to 267. [2021-02-19 18:24:51,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 266 states have (on average 2.007518796992481) internal successors, (534), 266 states have internal predecessors, (534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 534 transitions. [2021-02-19 18:24:51,494 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 534 transitions. Word has length 26 [2021-02-19 18:24:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:51,494 INFO L480 AbstractCegarLoop]: Abstraction has 267 states and 534 transitions. [2021-02-19 18:24:51,495 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 534 transitions. [2021-02-19 18:24:51,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:51,495 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:51,495 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:51,710 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-02-19 18:24:51,710 INFO L428 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:51,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:51,710 INFO L82 PathProgramCache]: Analyzing trace with hash 663083408, now seen corresponding path program 11 times [2021-02-19 18:24:51,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:51,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915621389] [2021-02-19 18:24:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:51,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:51,858 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:51,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915621389] [2021-02-19 18:24:51,859 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483648065] [2021-02-19 18:24:51,859 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 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 [2021-02-19 18:24:51,876 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:51,876 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:51,876 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:51,877 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:51,945 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 18:24:51,946 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:51,954 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:51,955 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:51,955 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-02-19 18:24:52,116 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:52,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:52,117 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:52,117 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787535518] [2021-02-19 18:24:52,117 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:52,117 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:52,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:52,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:52,118 INFO L87 Difference]: Start difference. First operand 267 states and 534 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:52,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:52,600 INFO L93 Difference]: Finished difference Result 331 states and 650 transitions. [2021-02-19 18:24:52,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:24:52,601 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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 26 [2021-02-19 18:24:52,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:52,602 INFO L225 Difference]: With dead ends: 331 [2021-02-19 18:24:52,602 INFO L226 Difference]: Without dead ends: 303 [2021-02-19 18:24:52,603 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:24:52,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2021-02-19 18:24:52,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 263. [2021-02-19 18:24:52,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.0076335877862594) internal successors, (526), 262 states have internal predecessors, (526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 526 transitions. [2021-02-19 18:24:52,609 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 526 transitions. Word has length 26 [2021-02-19 18:24:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:52,609 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 526 transitions. [2021-02-19 18:24:52,609 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 22 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) [2021-02-19 18:24:52,609 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 526 transitions. [2021-02-19 18:24:52,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:52,610 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:52,610 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:52,831 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-02-19 18:24:52,831 INFO L428 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:52,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:52,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1606122988, now seen corresponding path program 12 times [2021-02-19 18:24:52,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:52,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585177008] [2021-02-19 18:24:52,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:52,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:52,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585177008] [2021-02-19 18:24:52,993 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480837773] [2021-02-19 18:24:52,993 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 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 [2021-02-19 18:24:53,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:24:53,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:53,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:53,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:53,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:53,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:53,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:53,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:53,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 18:24:53,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:53,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:53,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:53,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102577910] [2021-02-19 18:24:53,256 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:53,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:53,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:53,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:53,257 INFO L87 Difference]: Start difference. First operand 263 states and 526 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:53,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:53,731 INFO L93 Difference]: Finished difference Result 355 states and 687 transitions. [2021-02-19 18:24:53,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:24:53,731 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-02-19 18:24:53,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:53,732 INFO L225 Difference]: With dead ends: 355 [2021-02-19 18:24:53,732 INFO L226 Difference]: Without dead ends: 323 [2021-02-19 18:24:53,733 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:53,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-02-19 18:24:53,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 275. [2021-02-19 18:24:53,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 2.010948905109489) internal successors, (551), 274 states have internal predecessors, (551), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:53,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 551 transitions. [2021-02-19 18:24:53,739 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 551 transitions. Word has length 26 [2021-02-19 18:24:53,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:53,739 INFO L480 AbstractCegarLoop]: Abstraction has 275 states and 551 transitions. [2021-02-19 18:24:53,739 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:53,739 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 551 transitions. [2021-02-19 18:24:53,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:53,740 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:53,740 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:53,960 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:53,961 INFO L428 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:53,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:53,961 INFO L82 PathProgramCache]: Analyzing trace with hash -380872530, now seen corresponding path program 13 times [2021-02-19 18:24:53,961 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:53,961 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564115411] [2021-02-19 18:24:53,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:53,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:54,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564115411] [2021-02-19 18:24:54,099 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515237707] [2021-02-19 18:24:54,099 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 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 [2021-02-19 18:24:54,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:54,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:54,216 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:54,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:54,222 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:54,223 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:54,223 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 18:24:54,346 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:54,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:54,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:54,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959326627] [2021-02-19 18:24:54,347 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:54,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:54,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:54,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:54,347 INFO L87 Difference]: Start difference. First operand 275 states and 551 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:54,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:54,888 INFO L93 Difference]: Finished difference Result 392 states and 754 transitions. [2021-02-19 18:24:54,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-02-19 18:24:54,888 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-02-19 18:24:54,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:54,889 INFO L225 Difference]: With dead ends: 392 [2021-02-19 18:24:54,890 INFO L226 Difference]: Without dead ends: 360 [2021-02-19 18:24:54,890 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1032, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:24:54,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2021-02-19 18:24:54,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 276. [2021-02-19 18:24:54,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 2.0109090909090908) internal successors, (553), 275 states have internal predecessors, (553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:54,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 553 transitions. [2021-02-19 18:24:54,897 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 553 transitions. Word has length 26 [2021-02-19 18:24:54,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:54,897 INFO L480 AbstractCegarLoop]: Abstraction has 276 states and 553 transitions. [2021-02-19 18:24:54,897 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:54,897 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 553 transitions. [2021-02-19 18:24:54,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:54,898 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:54,898 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:55,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-02-19 18:24:55,110 INFO L428 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:55,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:55,111 INFO L82 PathProgramCache]: Analyzing trace with hash 1045369836, now seen corresponding path program 14 times [2021-02-19 18:24:55,111 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:55,111 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570405887] [2021-02-19 18:24:55,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:55,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:55,247 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:55,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570405887] [2021-02-19 18:24:55,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999990132] [2021-02-19 18:24:55,247 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:55,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:55,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:55,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:55,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:55,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:55,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:55,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:55,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:55,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:20, output treesize:13 [2021-02-19 18:24:55,485 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:55,486 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:55,486 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:55,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887856506] [2021-02-19 18:24:55,486 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:55,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:55,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:55,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:55,487 INFO L87 Difference]: Start difference. First operand 276 states and 553 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:56,172 INFO L93 Difference]: Finished difference Result 435 states and 838 transitions. [2021-02-19 18:24:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:24:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-02-19 18:24:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:56,174 INFO L225 Difference]: With dead ends: 435 [2021-02-19 18:24:56,174 INFO L226 Difference]: Without dead ends: 403 [2021-02-19 18:24:56,174 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=1297, Unknown=0, NotChecked=0, Total=1482 [2021-02-19 18:24:56,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2021-02-19 18:24:56,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 273. [2021-02-19 18:24:56,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 2.0) internal successors, (544), 272 states have internal predecessors, (544), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:56,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 544 transitions. [2021-02-19 18:24:56,180 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 544 transitions. Word has length 26 [2021-02-19 18:24:56,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:56,181 INFO L480 AbstractCegarLoop]: Abstraction has 273 states and 544 transitions. [2021-02-19 18:24:56,181 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:56,181 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 544 transitions. [2021-02-19 18:24:56,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:56,181 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:56,181 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:56,398 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-02-19 18:24:56,398 INFO L428 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:56,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:56,398 INFO L82 PathProgramCache]: Analyzing trace with hash 24920326, now seen corresponding path program 15 times [2021-02-19 18:24:56,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:56,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219540155] [2021-02-19 18:24:56,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:56,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:56,554 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:56,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219540155] [2021-02-19 18:24:56,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525760138] [2021-02-19 18:24:56,555 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 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 [2021-02-19 18:24:56,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-02-19 18:24:56,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:56,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:56,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:24:56,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:56,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:56,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:56,674 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:56,674 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 18:24:56,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:56,804 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:56,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:56,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510362799] [2021-02-19 18:24:56,804 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:56,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:56,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:56,805 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:56,805 INFO L87 Difference]: Start difference. First operand 273 states and 544 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:57,282 INFO L93 Difference]: Finished difference Result 337 states and 660 transitions. [2021-02-19 18:24:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-02-19 18:24:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-02-19 18:24:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:57,284 INFO L225 Difference]: With dead ends: 337 [2021-02-19 18:24:57,284 INFO L226 Difference]: Without dead ends: 309 [2021-02-19 18:24:57,284 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1094, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:24:57,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 309 states. [2021-02-19 18:24:57,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 309 to 266. [2021-02-19 18:24:57,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 2.0037735849056606) internal successors, (531), 265 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:57,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 531 transitions. [2021-02-19 18:24:57,290 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 531 transitions. Word has length 26 [2021-02-19 18:24:57,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:57,290 INFO L480 AbstractCegarLoop]: Abstraction has 266 states and 531 transitions. [2021-02-19 18:24:57,291 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:57,291 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 531 transitions. [2021-02-19 18:24:57,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:57,291 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:57,291 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:57,512 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:57,512 INFO L428 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:57,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:57,512 INFO L82 PathProgramCache]: Analyzing trace with hash 973986166, now seen corresponding path program 16 times [2021-02-19 18:24:57,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:57,512 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963255745] [2021-02-19 18:24:57,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:57,661 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:57,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963255745] [2021-02-19 18:24:57,662 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142943504] [2021-02-19 18:24:57,662 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:24:57,688 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:24:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:57,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:24:57,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:57,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-02-19 18:24:57,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:57,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:57,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:57,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:27, output treesize:16 [2021-02-19 18:24:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:57,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:57,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:57,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357644067] [2021-02-19 18:24:57,947 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:57,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:57,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:57,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:57,948 INFO L87 Difference]: Start difference. First operand 266 states and 531 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:58,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:58,530 INFO L93 Difference]: Finished difference Result 343 states and 661 transitions. [2021-02-19 18:24:58,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:24:58,531 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-02-19 18:24:58,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:58,532 INFO L225 Difference]: With dead ends: 343 [2021-02-19 18:24:58,532 INFO L226 Difference]: Without dead ends: 311 [2021-02-19 18:24:58,532 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:24:58,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-02-19 18:24:58,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 263. [2021-02-19 18:24:58,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 2.00381679389313) internal successors, (525), 262 states have internal predecessors, (525), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:58,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 525 transitions. [2021-02-19 18:24:58,538 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 525 transitions. Word has length 26 [2021-02-19 18:24:58,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:58,538 INFO L480 AbstractCegarLoop]: Abstraction has 263 states and 525 transitions. [2021-02-19 18:24:58,538 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:58,538 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 525 transitions. [2021-02-19 18:24:58,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:58,539 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:58,539 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:58,760 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:58,760 INFO L428 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:58,761 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:58,761 INFO L82 PathProgramCache]: Analyzing trace with hash -1013009352, now seen corresponding path program 17 times [2021-02-19 18:24:58,761 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:58,761 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879433690] [2021-02-19 18:24:58,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:58,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:24:58,908 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:58,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879433690] [2021-02-19 18:24:58,908 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476939972] [2021-02-19 18:24:58,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:24:58,944 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:24:58,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:24:58,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 20 conjunts are in the unsatisfiable core [2021-02-19 18:24:58,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:59,040 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:24:59,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:24:59,047 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:24:59,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:24:59,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 18:24:59,193 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:24:59,193 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:24:59,193 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:24:59,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527892113] [2021-02-19 18:24:59,194 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:24:59,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:24:59,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:24:59,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=435, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:24:59,194 INFO L87 Difference]: Start difference. First operand 263 states and 525 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:59,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:24:59,722 INFO L93 Difference]: Finished difference Result 378 states and 724 transitions. [2021-02-19 18:24:59,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-02-19 18:24:59,722 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-02-19 18:24:59,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:24:59,723 INFO L225 Difference]: With dead ends: 378 [2021-02-19 18:24:59,723 INFO L226 Difference]: Without dead ends: 346 [2021-02-19 18:24:59,724 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:24:59,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-02-19 18:24:59,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 264. [2021-02-19 18:24:59,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 2.0038022813688214) internal successors, (527), 263 states have internal predecessors, (527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:24:59,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 527 transitions. [2021-02-19 18:24:59,729 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 527 transitions. Word has length 26 [2021-02-19 18:24:59,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:24:59,729 INFO L480 AbstractCegarLoop]: Abstraction has 264 states and 527 transitions. [2021-02-19 18:24:59,729 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:24:59,730 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 527 transitions. [2021-02-19 18:24:59,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:24:59,730 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:24:59,730 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:24:59,946 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:24:59,946 INFO L428 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:24:59,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:24:59,946 INFO L82 PathProgramCache]: Analyzing trace with hash 413233014, now seen corresponding path program 18 times [2021-02-19 18:24:59,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:24:59,946 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469589576] [2021-02-19 18:24:59,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:24:59,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:00,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469589576] [2021-02-19 18:25:00,085 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400275944] [2021-02-19 18:25:00,085 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:00,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-02-19 18:25:00,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:00,105 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:25:00,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:00,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:25:00,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:00,203 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:00,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:00,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 18:25:00,332 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:00,333 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:00,333 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:25:00,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618922022] [2021-02-19 18:25:00,333 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:25:00,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:00,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:25:00,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:25:00,334 INFO L87 Difference]: Start difference. First operand 264 states and 527 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:25:01,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:01,055 INFO L93 Difference]: Finished difference Result 410 states and 786 transitions. [2021-02-19 18:25:01,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:25:01,055 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-02-19 18:25:01,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:01,056 INFO L225 Difference]: With dead ends: 410 [2021-02-19 18:25:01,056 INFO L226 Difference]: Without dead ends: 378 [2021-02-19 18:25:01,057 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:25:01,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 378 states. [2021-02-19 18:25:01,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 378 to 255. [2021-02-19 18:25:01,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.9921259842519685) internal successors, (506), 254 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:01,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 506 transitions. [2021-02-19 18:25:01,063 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 506 transitions. Word has length 26 [2021-02-19 18:25:01,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:01,063 INFO L480 AbstractCegarLoop]: Abstraction has 255 states and 506 transitions. [2021-02-19 18:25:01,063 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:25:01,063 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 506 transitions. [2021-02-19 18:25:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-02-19 18:25:01,063 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:01,064 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:01,283 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-02-19 18:25:01,283 INFO L428 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:01,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:01,283 INFO L82 PathProgramCache]: Analyzing trace with hash -607216496, now seen corresponding path program 19 times [2021-02-19 18:25:01,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:01,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660713301] [2021-02-19 18:25:01,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:01,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:01,443 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:01,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660713301] [2021-02-19 18:25:01,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102738427] [2021-02-19 18:25:01,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:25:01,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:01,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 22 conjunts are in the unsatisfiable core [2021-02-19 18:25:01,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:01,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-02-19 18:25:01,551 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:01,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:01,558 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:01,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:23, output treesize:16 [2021-02-19 18:25:01,722 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:01,722 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:01,722 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-02-19 18:25:01,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677804406] [2021-02-19 18:25:01,723 INFO L460 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-02-19 18:25:01,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:01,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-02-19 18:25:01,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:25:01,724 INFO L87 Difference]: Start difference. First operand 255 states and 506 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:25:02,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:02,263 INFO L93 Difference]: Finished difference Result 307 states and 598 transitions. [2021-02-19 18:25:02,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-02-19 18:25:02,263 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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 26 [2021-02-19 18:25:02,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:02,264 INFO L225 Difference]: With dead ends: 307 [2021-02-19 18:25:02,264 INFO L226 Difference]: Without dead ends: 279 [2021-02-19 18:25:02,265 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=1031, Unknown=0, NotChecked=0, Total=1190 [2021-02-19 18:25:02,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-02-19 18:25:02,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 233. [2021-02-19 18:25:02,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.0) internal successors, (464), 232 states have internal predecessors, (464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:02,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 464 transitions. [2021-02-19 18:25:02,269 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 464 transitions. Word has length 26 [2021-02-19 18:25:02,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:02,270 INFO L480 AbstractCegarLoop]: Abstraction has 233 states and 464 transitions. [2021-02-19 18:25:02,270 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 22 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) [2021-02-19 18:25:02,270 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 464 transitions. [2021-02-19 18:25:02,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-02-19 18:25:02,270 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:02,270 INFO L506 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:02,478 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-02-19 18:25:02,478 INFO L428 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:02,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:02,478 INFO L82 PathProgramCache]: Analyzing trace with hash 1174048203, now seen corresponding path program 20 times [2021-02-19 18:25:02,478 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:02,478 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316631632] [2021-02-19 18:25:02,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:02,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:02,540 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:02,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316631632] [2021-02-19 18:25:02,541 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54917876] [2021-02-19 18:25:02,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:02,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:25:02,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:02,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjunts are in the unsatisfiable core [2021-02-19 18:25:02,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:02,706 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:02,707 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 11 treesize of output 7 [2021-02-19 18:25:02,709 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:02,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:02,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:02,714 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:17, output treesize:3 [2021-02-19 18:25:02,738 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:02,738 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:02,738 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-02-19 18:25:02,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [172879227] [2021-02-19 18:25:02,738 INFO L460 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-02-19 18:25:02,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:02,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-02-19 18:25:02,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2021-02-19 18:25:02,739 INFO L87 Difference]: Start difference. First operand 233 states and 464 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 18:25:02,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:02,987 INFO L93 Difference]: Finished difference Result 362 states and 698 transitions. [2021-02-19 18:25:02,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-02-19 18:25:02,987 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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 29 [2021-02-19 18:25:02,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:02,988 INFO L225 Difference]: With dead ends: 362 [2021-02-19 18:25:02,988 INFO L226 Difference]: Without dead ends: 362 [2021-02-19 18:25:02,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=116, Invalid=390, Unknown=0, NotChecked=0, Total=506 [2021-02-19 18:25:02,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-02-19 18:25:02,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 238. [2021-02-19 18:25:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.970464135021097) internal successors, (467), 237 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 467 transitions. [2021-02-19 18:25:02,994 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 467 transitions. Word has length 29 [2021-02-19 18:25:02,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:02,994 INFO L480 AbstractCegarLoop]: Abstraction has 238 states and 467 transitions. [2021-02-19 18:25:02,994 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 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) [2021-02-19 18:25:02,994 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 467 transitions. [2021-02-19 18:25:02,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-02-19 18:25:02,995 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:02,995 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:03,206 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:03,206 INFO L428 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:03,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:03,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1383072401, now seen corresponding path program 21 times [2021-02-19 18:25:03,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:03,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611535290] [2021-02-19 18:25:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:03,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:03,257 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:03,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611535290] [2021-02-19 18:25:03,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210930922] [2021-02-19 18:25:03,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:25:03,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-02-19 18:25:03,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:03,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 6 conjunts are in the unsatisfiable core [2021-02-19 18:25:03,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:03,350 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 15 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:03,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:03,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-02-19 18:25:03,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [373282074] [2021-02-19 18:25:03,351 INFO L460 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-02-19 18:25:03,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:03,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-02-19 18:25:03,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:25:03,351 INFO L87 Difference]: Start difference. First operand 238 states and 467 transitions. Second operand has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-02-19 18:25:03,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:03,367 INFO L93 Difference]: Finished difference Result 534 states and 1045 transitions. [2021-02-19 18:25:03,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-02-19 18:25:03,368 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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 30 [2021-02-19 18:25:03,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:03,369 INFO L225 Difference]: With dead ends: 534 [2021-02-19 18:25:03,369 INFO L226 Difference]: Without dead ends: 491 [2021-02-19 18:25:03,369 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-02-19 18:25:03,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-02-19 18:25:03,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 411. [2021-02-19 18:25:03,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 410 states have (on average 2.0634146341463415) internal successors, (846), 410 states have internal predecessors, (846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:03,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 846 transitions. [2021-02-19 18:25:03,384 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 846 transitions. Word has length 30 [2021-02-19 18:25:03,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:03,384 INFO L480 AbstractCegarLoop]: Abstraction has 411 states and 846 transitions. [2021-02-19 18:25:03,385 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.0) internal successors, (36), 5 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) [2021-02-19 18:25:03,385 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 846 transitions. [2021-02-19 18:25:03,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:03,386 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:03,386 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:03,608 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-02-19 18:25:03,609 INFO L428 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:03,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:03,609 INFO L82 PathProgramCache]: Analyzing trace with hash 865729384, now seen corresponding path program 22 times [2021-02-19 18:25:03,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:03,609 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676670275] [2021-02-19 18:25:03,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:03,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:03,879 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:03,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676670275] [2021-02-19 18:25:03,880 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499635907] [2021-02-19 18:25:03,880 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:03,899 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:25:03,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:03,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:03,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:04,084 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:25:04,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:25:04,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:04,092 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:04,093 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:04,093 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:25:04,237 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:04,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:04,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 26 [2021-02-19 18:25:04,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034976058] [2021-02-19 18:25:04,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 27 states [2021-02-19 18:25:04,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:04,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-02-19 18:25:04,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=629, Unknown=0, NotChecked=0, Total=702 [2021-02-19 18:25:04,238 INFO L87 Difference]: Start difference. First operand 411 states and 846 transitions. Second operand has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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) [2021-02-19 18:25:05,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:05,090 INFO L93 Difference]: Finished difference Result 550 states and 1089 transitions. [2021-02-19 18:25:05,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:25:05,091 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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 33 [2021-02-19 18:25:05,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:05,092 INFO L225 Difference]: With dead ends: 550 [2021-02-19 18:25:05,092 INFO L226 Difference]: Without dead ends: 502 [2021-02-19 18:25:05,093 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 4 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=181, Invalid=1711, Unknown=0, NotChecked=0, Total=1892 [2021-02-19 18:25:05,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 502 states. [2021-02-19 18:25:05,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 502 to 428. [2021-02-19 18:25:05,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 427 states have (on average 2.0468384074941453) internal successors, (874), 427 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) [2021-02-19 18:25:05,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 874 transitions. [2021-02-19 18:25:05,101 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 874 transitions. Word has length 33 [2021-02-19 18:25:05,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:05,101 INFO L480 AbstractCegarLoop]: Abstraction has 428 states and 874 transitions. [2021-02-19 18:25:05,101 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 27 states, 27 states have (on average 1.8888888888888888) internal successors, (51), 26 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) [2021-02-19 18:25:05,101 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 874 transitions. [2021-02-19 18:25:05,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:05,102 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:05,102 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:05,323 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:05,323 INFO L428 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:05,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:05,324 INFO L82 PathProgramCache]: Analyzing trace with hash 1629047718, now seen corresponding path program 23 times [2021-02-19 18:25:05,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:05,324 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727296175] [2021-02-19 18:25:05,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:05,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:05,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727296175] [2021-02-19 18:25:05,610 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025770757] [2021-02-19 18:25:05,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:05,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:25:05,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:05,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:25:05,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:05,881 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:25:05,881 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:25:05,882 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:05,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:05,888 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:05,888 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:25:06,024 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:06,024 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:06,024 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 18:25:06,024 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477649894] [2021-02-19 18:25:06,025 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:25:06,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:06,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:25:06,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:25:06,025 INFO L87 Difference]: Start difference. First operand 428 states and 874 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:07,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:07,118 INFO L93 Difference]: Finished difference Result 574 states and 1136 transitions. [2021-02-19 18:25:07,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:25:07,119 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 18:25:07,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:07,120 INFO L225 Difference]: With dead ends: 574 [2021-02-19 18:25:07,120 INFO L226 Difference]: Without dead ends: 526 [2021-02-19 18:25:07,120 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=204, Invalid=1958, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:25:07,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-02-19 18:25:07,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 434. [2021-02-19 18:25:07,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 2.0531177829099305) internal successors, (889), 433 states have internal predecessors, (889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:07,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 889 transitions. [2021-02-19 18:25:07,128 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 889 transitions. Word has length 33 [2021-02-19 18:25:07,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:07,128 INFO L480 AbstractCegarLoop]: Abstraction has 434 states and 889 transitions. [2021-02-19 18:25:07,128 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:07,128 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 889 transitions. [2021-02-19 18:25:07,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:07,129 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:07,129 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:07,346 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-02-19 18:25:07,346 INFO L428 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:07,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:07,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1386547864, now seen corresponding path program 24 times [2021-02-19 18:25:07,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:07,346 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922131113] [2021-02-19 18:25:07,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:07,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:07,642 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:07,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922131113] [2021-02-19 18:25:07,642 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134514675] [2021-02-19 18:25:07,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:07,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:25:07,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:07,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:07,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:07,913 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:25:07,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:25:07,915 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:07,920 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:07,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:07,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:25:08,058 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:08,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:08,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 18:25:08,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175788294] [2021-02-19 18:25:08,059 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:25:08,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:08,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:25:08,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:25:08,060 INFO L87 Difference]: Start difference. First operand 434 states and 889 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:09,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:09,180 INFO L93 Difference]: Finished difference Result 599 states and 1183 transitions. [2021-02-19 18:25:09,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:25:09,180 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 18:25:09,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:09,182 INFO L225 Difference]: With dead ends: 599 [2021-02-19 18:25:09,182 INFO L226 Difference]: Without dead ends: 551 [2021-02-19 18:25:09,183 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 469 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=202, Invalid=1960, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:25:09,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-02-19 18:25:09,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 435. [2021-02-19 18:25:09,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 434 states have (on average 2.052995391705069) internal successors, (891), 434 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:09,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 891 transitions. [2021-02-19 18:25:09,191 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 891 transitions. Word has length 33 [2021-02-19 18:25:09,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:09,191 INFO L480 AbstractCegarLoop]: Abstraction has 435 states and 891 transitions. [2021-02-19 18:25:09,191 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:09,191 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 891 transitions. [2021-02-19 18:25:09,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:09,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:09,192 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:09,414 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:09,414 INFO L428 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:09,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:09,415 INFO L82 PathProgramCache]: Analyzing trace with hash -925274, now seen corresponding path program 25 times [2021-02-19 18:25:09,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:09,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842370829] [2021-02-19 18:25:09,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:09,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:09,672 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:09,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842370829] [2021-02-19 18:25:09,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761884700] [2021-02-19 18:25:09,673 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:09,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:09,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:09,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:09,934 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:25:09,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:25:09,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:09,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:09,940 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:09,940 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:25:10,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:10,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:10,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 18:25:10,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306014584] [2021-02-19 18:25:10,054 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:25:10,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:10,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:25:10,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:25:10,055 INFO L87 Difference]: Start difference. First operand 435 states and 891 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:11,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:11,184 INFO L93 Difference]: Finished difference Result 637 states and 1261 transitions. [2021-02-19 18:25:11,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-02-19 18:25:11,184 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 18:25:11,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:11,186 INFO L225 Difference]: With dead ends: 637 [2021-02-19 18:25:11,186 INFO L226 Difference]: Without dead ends: 589 [2021-02-19 18:25:11,186 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 500 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:25:11,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-02-19 18:25:11,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 439. [2021-02-19 18:25:11,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.0525114155251143) internal successors, (899), 438 states have internal predecessors, (899), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:11,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 899 transitions. [2021-02-19 18:25:11,194 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 899 transitions. Word has length 33 [2021-02-19 18:25:11,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:11,194 INFO L480 AbstractCegarLoop]: Abstraction has 439 states and 899 transitions. [2021-02-19 18:25:11,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:11,194 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 899 transitions. [2021-02-19 18:25:11,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:11,195 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:11,195 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:11,410 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-02-19 18:25:11,410 INFO L428 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:11,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:11,410 INFO L82 PathProgramCache]: Analyzing trace with hash -642035864, now seen corresponding path program 26 times [2021-02-19 18:25:11,410 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:11,410 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584921817] [2021-02-19 18:25:11,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:11,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:11,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:11,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584921817] [2021-02-19 18:25:11,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014415381] [2021-02-19 18:25:11,722 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:11,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:25:11,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:11,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:11,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:11,954 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:25:11,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:25:11,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:11,967 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:11,968 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:11,968 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:25:12,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:12,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:12,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 18:25:12,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840635531] [2021-02-19 18:25:12,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:25:12,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:12,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:25:12,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=733, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:25:12,117 INFO L87 Difference]: Start difference. First operand 439 states and 899 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:13,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:13,487 INFO L93 Difference]: Finished difference Result 678 states and 1346 transitions. [2021-02-19 18:25:13,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:25:13,487 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 18:25:13,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:13,488 INFO L225 Difference]: With dead ends: 678 [2021-02-19 18:25:13,489 INFO L226 Difference]: Without dead ends: 646 [2021-02-19 18:25:13,489 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=282, Invalid=2798, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:25:13,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-02-19 18:25:13,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 440. [2021-02-19 18:25:13,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.052391799544419) internal successors, (901), 439 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:13,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 901 transitions. [2021-02-19 18:25:13,497 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 901 transitions. Word has length 33 [2021-02-19 18:25:13,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:13,497 INFO L480 AbstractCegarLoop]: Abstraction has 440 states and 901 transitions. [2021-02-19 18:25:13,498 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:13,498 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 901 transitions. [2021-02-19 18:25:13,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:13,499 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:13,499 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:13,720 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:13,720 INFO L428 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:13,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:13,720 INFO L82 PathProgramCache]: Analyzing trace with hash 784206502, now seen corresponding path program 27 times [2021-02-19 18:25:13,720 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:13,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492187359] [2021-02-19 18:25:13,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:13,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:13,985 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:13,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492187359] [2021-02-19 18:25:13,985 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205313377] [2021-02-19 18:25:13,985 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:14,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:25:14,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:14,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:14,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:14,222 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:25:14,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:25:14,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:14,229 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:14,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:14,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:25:14,376 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:14,376 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:14,376 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 28 [2021-02-19 18:25:14,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685942627] [2021-02-19 18:25:14,376 INFO L460 AbstractCegarLoop]: Interpolant automaton has 29 states [2021-02-19 18:25:14,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:14,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-02-19 18:25:14,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2021-02-19 18:25:14,377 INFO L87 Difference]: Start difference. First operand 440 states and 901 transitions. Second operand has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:16,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:16,259 INFO L93 Difference]: Finished difference Result 758 states and 1504 transitions. [2021-02-19 18:25:16,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:25:16,260 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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 33 [2021-02-19 18:25:16,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:16,262 INFO L225 Difference]: With dead ends: 758 [2021-02-19 18:25:16,262 INFO L226 Difference]: Without dead ends: 714 [2021-02-19 18:25:16,262 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 20 SyntacticMatches, 4 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 966 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=335, Invalid=3571, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:25:16,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 714 states. [2021-02-19 18:25:16,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 714 to 447. [2021-02-19 18:25:16,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.0493273542600896) internal successors, (914), 446 states have internal predecessors, (914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:16,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 914 transitions. [2021-02-19 18:25:16,269 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 914 transitions. Word has length 33 [2021-02-19 18:25:16,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:16,269 INFO L480 AbstractCegarLoop]: Abstraction has 447 states and 914 transitions. [2021-02-19 18:25:16,269 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 29 states, 29 states have (on average 2.0) internal successors, (58), 28 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) [2021-02-19 18:25:16,270 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 914 transitions. [2021-02-19 18:25:16,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:16,270 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:16,271 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:16,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-02-19 18:25:16,492 INFO L428 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:16,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1817915618, now seen corresponding path program 28 times [2021-02-19 18:25:16,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:16,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990540324] [2021-02-19 18:25:16,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:16,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:16,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:16,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990540324] [2021-02-19 18:25:16,759 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463901861] [2021-02-19 18:25:16,759 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:25:16,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:25:16,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:16,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:16,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:17,020 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:17,021 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:17,021 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:17,033 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:17,044 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:17,047 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:17,047 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:25:17,236 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:17,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:17,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:17,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441609074] [2021-02-19 18:25:17,237 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:17,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:17,237 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:17,237 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:17,238 INFO L87 Difference]: Start difference. First operand 447 states and 914 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:18,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:18,210 INFO L93 Difference]: Finished difference Result 566 states and 1143 transitions. [2021-02-19 18:25:18,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:25:18,211 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:18,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:18,212 INFO L225 Difference]: With dead ends: 566 [2021-02-19 18:25:18,212 INFO L226 Difference]: Without dead ends: 538 [2021-02-19 18:25:18,213 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:25:18,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-02-19 18:25:18,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 450. [2021-02-19 18:25:18,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 450 states, 449 states have (on average 2.046770601336303) internal successors, (919), 449 states have internal predecessors, (919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:18,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 450 states to 450 states and 919 transitions. [2021-02-19 18:25:18,220 INFO L78 Accepts]: Start accepts. Automaton has 450 states and 919 transitions. Word has length 33 [2021-02-19 18:25:18,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:18,220 INFO L480 AbstractCegarLoop]: Abstraction has 450 states and 919 transitions. [2021-02-19 18:25:18,220 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:18,220 INFO L276 IsEmpty]: Start isEmpty. Operand 450 states and 919 transitions. [2021-02-19 18:25:18,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:18,221 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:18,221 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:18,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:18,434 INFO L428 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:18,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:18,434 INFO L82 PathProgramCache]: Analyzing trace with hash -445370518, now seen corresponding path program 29 times [2021-02-19 18:25:18,434 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:18,434 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46099952] [2021-02-19 18:25:18,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:18,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:18,701 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:18,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46099952] [2021-02-19 18:25:18,701 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368620750] [2021-02-19 18:25:18,701 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:18,721 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-02-19 18:25:18,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:18,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:25:18,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:19,060 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:19,061 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:19,062 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:19,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:25:19,064 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:19,072 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:19,073 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:19,073 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 18:25:19,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:19,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:19,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:19,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799716976] [2021-02-19 18:25:19,223 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:19,223 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:19,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:19,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:19,224 INFO L87 Difference]: Start difference. First operand 450 states and 919 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:20,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:20,272 INFO L93 Difference]: Finished difference Result 581 states and 1153 transitions. [2021-02-19 18:25:20,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:25:20,273 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:20,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:20,275 INFO L225 Difference]: With dead ends: 581 [2021-02-19 18:25:20,275 INFO L226 Difference]: Without dead ends: 533 [2021-02-19 18:25:20,276 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:25:20,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2021-02-19 18:25:20,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 459. [2021-02-19 18:25:20,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.052401746724891) internal successors, (940), 458 states have internal predecessors, (940), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:20,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 940 transitions. [2021-02-19 18:25:20,283 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 940 transitions. Word has length 33 [2021-02-19 18:25:20,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:20,283 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 940 transitions. [2021-02-19 18:25:20,283 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:20,283 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 940 transitions. [2021-02-19 18:25:20,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:20,284 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:20,284 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:20,505 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-02-19 18:25:20,505 INFO L428 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:20,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:20,506 INFO L82 PathProgramCache]: Analyzing trace with hash 834001196, now seen corresponding path program 30 times [2021-02-19 18:25:20,506 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:20,506 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [598922848] [2021-02-19 18:25:20,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:20,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:20,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [598922848] [2021-02-19 18:25:20,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701670680] [2021-02-19 18:25:20,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:20,801 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:25:20,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:20,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:20,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:21,166 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:21,167 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:21,168 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:21,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:21,177 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:21,178 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:21,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:21,333 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:21,334 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:21,334 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:21,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723736053] [2021-02-19 18:25:21,334 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:21,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:21,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:21,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:21,335 INFO L87 Difference]: Start difference. First operand 459 states and 940 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:22,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:22,503 INFO L93 Difference]: Finished difference Result 618 states and 1220 transitions. [2021-02-19 18:25:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:25:22,504 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:22,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:22,505 INFO L225 Difference]: With dead ends: 618 [2021-02-19 18:25:22,505 INFO L226 Difference]: Without dead ends: 570 [2021-02-19 18:25:22,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=1878, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:25:22,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2021-02-19 18:25:22,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 460. [2021-02-19 18:25:22,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 459 states have (on average 2.052287581699346) internal successors, (942), 459 states have internal predecessors, (942), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 942 transitions. [2021-02-19 18:25:22,512 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 942 transitions. Word has length 33 [2021-02-19 18:25:22,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:22,512 INFO L480 AbstractCegarLoop]: Abstraction has 460 states and 942 transitions. [2021-02-19 18:25:22,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:22,513 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 942 transitions. [2021-02-19 18:25:22,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:22,514 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:22,514 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:22,730 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-02-19 18:25:22,730 INFO L428 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:22,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:22,730 INFO L82 PathProgramCache]: Analyzing trace with hash -2075343510, now seen corresponding path program 31 times [2021-02-19 18:25:22,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:22,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3528206] [2021-02-19 18:25:22,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:22,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:23,020 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:23,020 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3528206] [2021-02-19 18:25:23,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007043643] [2021-02-19 18:25:23,021 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:23,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:23,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:23,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:23,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:23,369 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:23,369 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:23,370 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:23,371 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:23,380 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:23,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:23,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:23,535 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:23,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:23,535 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:23,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292977275] [2021-02-19 18:25:23,536 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:23,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:23,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:23,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:23,537 INFO L87 Difference]: Start difference. First operand 460 states and 942 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:24,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:24,684 INFO L93 Difference]: Finished difference Result 656 states and 1298 transitions. [2021-02-19 18:25:24,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:25:24,685 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:24,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:24,687 INFO L225 Difference]: With dead ends: 656 [2021-02-19 18:25:24,687 INFO L226 Difference]: Without dead ends: 608 [2021-02-19 18:25:24,687 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 481 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:25:24,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2021-02-19 18:25:24,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 464. [2021-02-19 18:25:24,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0518358531317493) internal successors, (950), 463 states have internal predecessors, (950), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:24,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 950 transitions. [2021-02-19 18:25:24,694 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 950 transitions. Word has length 33 [2021-02-19 18:25:24,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:24,694 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 950 transitions. [2021-02-19 18:25:24,695 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:24,695 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 950 transitions. [2021-02-19 18:25:24,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:24,696 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:24,696 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:24,910 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-02-19 18:25:24,910 INFO L428 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:24,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:24,910 INFO L82 PathProgramCache]: Analyzing trace with hash 1578513196, now seen corresponding path program 32 times [2021-02-19 18:25:24,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:24,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421804600] [2021-02-19 18:25:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:24,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:25,213 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:25,213 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421804600] [2021-02-19 18:25:25,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966920807] [2021-02-19 18:25:25,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:25,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:25:25,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:25,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:25,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:25,502 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:25,503 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:25,504 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:25,505 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:25,513 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:25,515 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:25,515 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:25,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:25,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:25,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:25,689 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955777695] [2021-02-19 18:25:25,690 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:25,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:25,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:25,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:25,692 INFO L87 Difference]: Start difference. First operand 464 states and 950 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:26,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:26,984 INFO L93 Difference]: Finished difference Result 689 states and 1367 transitions. [2021-02-19 18:25:26,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:25:26,984 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:26,986 INFO L225 Difference]: With dead ends: 689 [2021-02-19 18:25:26,986 INFO L226 Difference]: Without dead ends: 657 [2021-02-19 18:25:26,986 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:25:26,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-02-19 18:25:26,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 465. [2021-02-19 18:25:26,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0517241379310347) internal successors, (952), 464 states have internal predecessors, (952), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:26,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 952 transitions. [2021-02-19 18:25:26,993 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 952 transitions. Word has length 33 [2021-02-19 18:25:26,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:26,993 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 952 transitions. [2021-02-19 18:25:26,993 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:26,993 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 952 transitions. [2021-02-19 18:25:26,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:26,994 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:26,994 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:27,194 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-02-19 18:25:27,194 INFO L428 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:27,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:27,195 INFO L82 PathProgramCache]: Analyzing trace with hash -1290211734, now seen corresponding path program 33 times [2021-02-19 18:25:27,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:27,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494064903] [2021-02-19 18:25:27,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:27,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:27,469 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:27,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494064903] [2021-02-19 18:25:27,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630724768] [2021-02-19 18:25:27,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:27,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:25:27,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:27,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:27,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:27,740 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:27,741 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:27,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:27,742 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:27,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:27,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:27,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:27,945 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:27,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:27,945 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:27,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227589164] [2021-02-19 18:25:27,945 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:27,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:27,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:27,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:27,946 INFO L87 Difference]: Start difference. First operand 465 states and 952 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:29,636 INFO L93 Difference]: Finished difference Result 757 states and 1498 transitions. [2021-02-19 18:25:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:25:29,636 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:29,638 INFO L225 Difference]: With dead ends: 757 [2021-02-19 18:25:29,638 INFO L226 Difference]: Without dead ends: 713 [2021-02-19 18:25:29,639 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 786 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:25:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2021-02-19 18:25:29,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 461. [2021-02-19 18:25:29,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 461 states, 460 states have (on average 2.0456521739130435) internal successors, (941), 460 states have internal predecessors, (941), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:29,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 461 states to 461 states and 941 transitions. [2021-02-19 18:25:29,648 INFO L78 Accepts]: Start accepts. Automaton has 461 states and 941 transitions. Word has length 33 [2021-02-19 18:25:29,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:29,648 INFO L480 AbstractCegarLoop]: Abstraction has 461 states and 941 transitions. [2021-02-19 18:25:29,648 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:29,649 INFO L276 IsEmpty]: Start isEmpty. Operand 461 states and 941 transitions. [2021-02-19 18:25:29,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:29,650 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:29,650 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:29,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:29,871 INFO L428 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:29,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:29,872 INFO L82 PathProgramCache]: Analyzing trace with hash -1927927446, now seen corresponding path program 34 times [2021-02-19 18:25:29,872 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:29,872 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182809341] [2021-02-19 18:25:29,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:30,203 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:30,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182809341] [2021-02-19 18:25:30,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034317750] [2021-02-19 18:25:30,204 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:25:30,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:25:30,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:30,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:30,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:30,504 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:30,505 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:30,506 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:30,507 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:30,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:30,518 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:30,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:25:30,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:30,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:30,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:30,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247674447] [2021-02-19 18:25:30,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:30,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:30,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:30,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:30,722 INFO L87 Difference]: Start difference. First operand 461 states and 941 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:31,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:31,765 INFO L93 Difference]: Finished difference Result 579 states and 1168 transitions. [2021-02-19 18:25:31,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:25:31,765 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:31,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:31,767 INFO L225 Difference]: With dead ends: 579 [2021-02-19 18:25:31,767 INFO L226 Difference]: Without dead ends: 551 [2021-02-19 18:25:31,767 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:25:31,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-02-19 18:25:31,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 453. [2021-02-19 18:25:31,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.0464601769911503) internal successors, (925), 452 states have internal predecessors, (925), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:31,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 925 transitions. [2021-02-19 18:25:31,772 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 925 transitions. Word has length 33 [2021-02-19 18:25:31,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:31,772 INFO L480 AbstractCegarLoop]: Abstraction has 453 states and 925 transitions. [2021-02-19 18:25:31,772 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:31,772 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 925 transitions. [2021-02-19 18:25:31,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:31,773 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:31,773 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:31,973 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-02-19 18:25:31,973 INFO L428 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:31,974 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:31,974 INFO L82 PathProgramCache]: Analyzing trace with hash 548696360, now seen corresponding path program 35 times [2021-02-19 18:25:31,974 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:31,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313146941] [2021-02-19 18:25:31,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:31,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:32,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:32,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313146941] [2021-02-19 18:25:32,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701577103] [2021-02-19 18:25:32,255 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:32,275 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:25:32,275 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:32,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:25:32,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:32,572 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:32,573 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:32,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:25:32,574 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:32,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:32,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:32,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 18:25:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:32,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:32,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:32,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319213017] [2021-02-19 18:25:32,707 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:32,707 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:32,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:32,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:32,707 INFO L87 Difference]: Start difference. First operand 453 states and 925 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:33,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:33,564 INFO L93 Difference]: Finished difference Result 557 states and 1118 transitions. [2021-02-19 18:25:33,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:25:33,564 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:33,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:33,566 INFO L225 Difference]: With dead ends: 557 [2021-02-19 18:25:33,566 INFO L226 Difference]: Without dead ends: 509 [2021-02-19 18:25:33,566 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:25:33,566 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 509 states. [2021-02-19 18:25:33,570 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 509 to 456. [2021-02-19 18:25:33,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 455 states have (on average 2.046153846153846) internal successors, (931), 455 states have internal predecessors, (931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:33,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 931 transitions. [2021-02-19 18:25:33,571 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 931 transitions. Word has length 33 [2021-02-19 18:25:33,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:33,571 INFO L480 AbstractCegarLoop]: Abstraction has 456 states and 931 transitions. [2021-02-19 18:25:33,571 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:33,571 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 931 transitions. [2021-02-19 18:25:33,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:33,572 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:33,572 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:33,779 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-02-19 18:25:33,779 INFO L428 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:33,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:33,780 INFO L82 PathProgramCache]: Analyzing trace with hash 1934318950, now seen corresponding path program 36 times [2021-02-19 18:25:33,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:33,780 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921042194] [2021-02-19 18:25:33,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:33,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:34,071 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:34,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921042194] [2021-02-19 18:25:34,071 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152976746] [2021-02-19 18:25:34,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:34,090 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:25:34,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:34,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:25:34,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:34,404 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:34,405 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:34,406 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:34,406 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:34,407 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:34,414 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:34,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:34,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:34,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:34,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:34,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:34,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288716489] [2021-02-19 18:25:34,531 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:34,531 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:34,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:34,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:34,531 INFO L87 Difference]: Start difference. First operand 456 states and 931 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:35,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:35,635 INFO L93 Difference]: Finished difference Result 562 states and 1131 transitions. [2021-02-19 18:25:35,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-02-19 18:25:35,635 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:35,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:35,636 INFO L225 Difference]: With dead ends: 562 [2021-02-19 18:25:35,637 INFO L226 Difference]: Without dead ends: 518 [2021-02-19 18:25:35,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=1861, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:25:35,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-02-19 18:25:35,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 462. [2021-02-19 18:25:35,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 462 states, 461 states have (on average 2.0455531453362257) internal successors, (943), 461 states have internal predecessors, (943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:35,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 462 states to 462 states and 943 transitions. [2021-02-19 18:25:35,641 INFO L78 Accepts]: Start accepts. Automaton has 462 states and 943 transitions. Word has length 33 [2021-02-19 18:25:35,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:35,641 INFO L480 AbstractCegarLoop]: Abstraction has 462 states and 943 transitions. [2021-02-19 18:25:35,642 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:35,642 INFO L276 IsEmpty]: Start isEmpty. Operand 462 states and 943 transitions. [2021-02-19 18:25:35,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:35,642 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:35,642 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:35,842 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:35,843 INFO L428 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:35,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:35,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1293208360, now seen corresponding path program 37 times [2021-02-19 18:25:35,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:35,843 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529305688] [2021-02-19 18:25:35,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:35,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:36,174 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:36,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529305688] [2021-02-19 18:25:36,175 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695529403] [2021-02-19 18:25:36,175 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:36,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:36,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:36,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:36,441 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:36,441 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:36,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:36,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:36,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:36,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:36,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:36,594 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:36,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:36,595 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:36,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042283647] [2021-02-19 18:25:36,595 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:36,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:36,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:36,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:36,596 INFO L87 Difference]: Start difference. First operand 462 states and 943 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:37,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:37,701 INFO L93 Difference]: Finished difference Result 596 states and 1202 transitions. [2021-02-19 18:25:37,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:25:37,702 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:37,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:37,703 INFO L225 Difference]: With dead ends: 596 [2021-02-19 18:25:37,703 INFO L226 Difference]: Without dead ends: 564 [2021-02-19 18:25:37,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=264, Invalid=2186, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:25:37,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2021-02-19 18:25:37,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 463. [2021-02-19 18:25:37,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.0454545454545454) internal successors, (945), 462 states have internal predecessors, (945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:37,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 945 transitions. [2021-02-19 18:25:37,708 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 945 transitions. Word has length 33 [2021-02-19 18:25:37,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:37,708 INFO L480 AbstractCegarLoop]: Abstraction has 463 states and 945 transitions. [2021-02-19 18:25:37,708 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:37,708 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 945 transitions. [2021-02-19 18:25:37,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:37,709 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:37,709 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:37,930 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2021-02-19 18:25:37,930 INFO L428 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:37,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:37,931 INFO L82 PathProgramCache]: Analyzing trace with hash -1575516570, now seen corresponding path program 38 times [2021-02-19 18:25:37,931 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:37,931 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521074332] [2021-02-19 18:25:37,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:37,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:38,248 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:38,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521074332] [2021-02-19 18:25:38,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864628946] [2021-02-19 18:25:38,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:38,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:25:38,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:38,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:38,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:38,514 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:38,515 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:38,515 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:38,515 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:38,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:38,525 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:38,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:38,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:38,673 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:38,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:38,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:38,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609867766] [2021-02-19 18:25:38,673 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:38,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:38,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:38,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:38,674 INFO L87 Difference]: Start difference. First operand 463 states and 945 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:40,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:40,446 INFO L93 Difference]: Finished difference Result 658 states and 1327 transitions. [2021-02-19 18:25:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:25:40,447 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:40,447 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:40,449 INFO L225 Difference]: With dead ends: 658 [2021-02-19 18:25:40,449 INFO L226 Difference]: Without dead ends: 610 [2021-02-19 18:25:40,450 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 885 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=371, Invalid=3169, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:25:40,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 610 states. [2021-02-19 18:25:40,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 610 to 464. [2021-02-19 18:25:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 463 states have (on average 2.0431965442764577) internal successors, (946), 463 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 946 transitions. [2021-02-19 18:25:40,457 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 946 transitions. Word has length 33 [2021-02-19 18:25:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:40,457 INFO L480 AbstractCegarLoop]: Abstraction has 464 states and 946 transitions. [2021-02-19 18:25:40,457 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 946 transitions. [2021-02-19 18:25:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:40,458 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:40,458 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:40,666 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:40,666 INFO L428 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:40,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:40,666 INFO L82 PathProgramCache]: Analyzing trace with hash 1804817980, now seen corresponding path program 39 times [2021-02-19 18:25:40,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:40,666 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847745644] [2021-02-19 18:25:40,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:40,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:40,966 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:40,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847745644] [2021-02-19 18:25:40,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576482198] [2021-02-19 18:25:40,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:40,987 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:25:40,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:40,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:40,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:41,189 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:41,190 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:41,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:41,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:41,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:41,201 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:41,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:25:41,374 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:41,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:41,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:41,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455499241] [2021-02-19 18:25:41,375 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:41,375 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:41,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:41,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:41,375 INFO L87 Difference]: Start difference. First operand 464 states and 946 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:42,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:42,515 INFO L93 Difference]: Finished difference Result 556 states and 1117 transitions. [2021-02-19 18:25:42,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:25:42,516 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:42,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:42,517 INFO L225 Difference]: With dead ends: 556 [2021-02-19 18:25:42,517 INFO L226 Difference]: Without dead ends: 528 [2021-02-19 18:25:42,518 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=260, Invalid=2190, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:25:42,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2021-02-19 18:25:42,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 459. [2021-02-19 18:25:42,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.0458515283842793) internal successors, (937), 458 states have internal predecessors, (937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:42,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 937 transitions. [2021-02-19 18:25:42,523 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 937 transitions. Word has length 33 [2021-02-19 18:25:42,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:42,523 INFO L480 AbstractCegarLoop]: Abstraction has 459 states and 937 transitions. [2021-02-19 18:25:42,523 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:42,523 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 937 transitions. [2021-02-19 18:25:42,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:42,524 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:42,524 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:42,726 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-02-19 18:25:42,726 INFO L428 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:42,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:42,726 INFO L82 PathProgramCache]: Analyzing trace with hash -680897506, now seen corresponding path program 40 times [2021-02-19 18:25:42,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:42,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882671669] [2021-02-19 18:25:42,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:42,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:43,035 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:43,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882671669] [2021-02-19 18:25:43,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [530334623] [2021-02-19 18:25:43,036 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:25:43,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:25:43,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:43,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:43,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:43,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:43,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:43,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:43,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:43,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:43,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:43,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:43,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:43,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:43,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:43,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:43,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349059581] [2021-02-19 18:25:43,518 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:43,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:43,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:43,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:43,519 INFO L87 Difference]: Start difference. First operand 459 states and 937 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:44,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:44,617 INFO L93 Difference]: Finished difference Result 607 states and 1202 transitions. [2021-02-19 18:25:44,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:25:44,617 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:44,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:44,619 INFO L225 Difference]: With dead ends: 607 [2021-02-19 18:25:44,619 INFO L226 Difference]: Without dead ends: 559 [2021-02-19 18:25:44,619 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1877, Unknown=0, NotChecked=0, Total=2070 [2021-02-19 18:25:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-02-19 18:25:44,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 471. [2021-02-19 18:25:44,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.051063829787234) internal successors, (964), 470 states have internal predecessors, (964), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:44,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 964 transitions. [2021-02-19 18:25:44,624 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 964 transitions. Word has length 33 [2021-02-19 18:25:44,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:44,624 INFO L480 AbstractCegarLoop]: Abstraction has 471 states and 964 transitions. [2021-02-19 18:25:44,624 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:44,624 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 964 transitions. [2021-02-19 18:25:44,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:44,624 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:44,624 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:44,825 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:44,825 INFO L428 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:44,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:44,825 INFO L82 PathProgramCache]: Analyzing trace with hash 598474208, now seen corresponding path program 41 times [2021-02-19 18:25:44,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:44,825 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556593065] [2021-02-19 18:25:44,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:45,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556593065] [2021-02-19 18:25:45,107 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560970252] [2021-02-19 18:25:45,107 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:45,127 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:25:45,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:45,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:45,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:45,481 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:45,483 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:45,483 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:45,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:25:45,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:45,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:45,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:45,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 18:25:45,674 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:45,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:45,675 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 31 [2021-02-19 18:25:45,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174846909] [2021-02-19 18:25:45,675 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:25:45,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:45,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:25:45,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:25:45,675 INFO L87 Difference]: Start difference. First operand 471 states and 964 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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) [2021-02-19 18:25:46,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:46,898 INFO L93 Difference]: Finished difference Result 644 states and 1269 transitions. [2021-02-19 18:25:46,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:25:46,899 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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 33 [2021-02-19 18:25:46,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:46,901 INFO L225 Difference]: With dead ends: 644 [2021-02-19 18:25:46,901 INFO L226 Difference]: Without dead ends: 596 [2021-02-19 18:25:46,901 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=2138, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:25:46,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-02-19 18:25:46,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 472. [2021-02-19 18:25:46,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 471 states have (on average 2.050955414012739) internal successors, (966), 471 states have internal predecessors, (966), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:46,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 966 transitions. [2021-02-19 18:25:46,906 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 966 transitions. Word has length 33 [2021-02-19 18:25:46,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:46,906 INFO L480 AbstractCegarLoop]: Abstraction has 472 states and 966 transitions. [2021-02-19 18:25:46,906 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 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) [2021-02-19 18:25:46,906 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 966 transitions. [2021-02-19 18:25:46,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:46,907 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:46,907 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:47,128 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-02-19 18:25:47,129 INFO L428 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:47,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:47,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1984096798, now seen corresponding path program 42 times [2021-02-19 18:25:47,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:47,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947335847] [2021-02-19 18:25:47,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:47,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:47,403 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:47,403 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947335847] [2021-02-19 18:25:47,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301979819] [2021-02-19 18:25:47,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:25:47,422 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:25:47,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:47,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:47,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:47,723 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:47,724 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:47,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:47,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:47,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:47,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:47,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:47,854 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:47,854 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:47,854 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:47,854 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226248705] [2021-02-19 18:25:47,854 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:47,854 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:47,855 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:47,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:47,855 INFO L87 Difference]: Start difference. First operand 472 states and 966 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:49,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:49,171 INFO L93 Difference]: Finished difference Result 682 states and 1347 transitions. [2021-02-19 18:25:49,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:25:49,172 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:49,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:49,173 INFO L225 Difference]: With dead ends: 682 [2021-02-19 18:25:49,174 INFO L226 Difference]: Without dead ends: 634 [2021-02-19 18:25:49,174 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=204, Invalid=2052, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:25:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2021-02-19 18:25:49,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 476. [2021-02-19 18:25:49,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 476 states, 475 states have (on average 2.0505263157894738) internal successors, (974), 475 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:49,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 476 states to 476 states and 974 transitions. [2021-02-19 18:25:49,179 INFO L78 Accepts]: Start accepts. Automaton has 476 states and 974 transitions. Word has length 33 [2021-02-19 18:25:49,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:49,179 INFO L480 AbstractCegarLoop]: Abstraction has 476 states and 974 transitions. [2021-02-19 18:25:49,179 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:49,179 INFO L276 IsEmpty]: Start isEmpty. Operand 476 states and 974 transitions. [2021-02-19 18:25:49,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:49,180 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:49,180 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:49,380 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-02-19 18:25:49,380 INFO L428 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:49,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:49,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1342986208, now seen corresponding path program 43 times [2021-02-19 18:25:49,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:49,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856832705] [2021-02-19 18:25:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:49,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:49,637 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:49,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856832705] [2021-02-19 18:25:49,637 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528576363] [2021-02-19 18:25:49,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:49,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:49,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:49,956 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:49,957 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:49,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:49,959 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:49,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:49,971 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:49,971 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:50,131 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:50,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:50,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:50,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266339466] [2021-02-19 18:25:50,132 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:50,132 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:50,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:50,133 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:50,133 INFO L87 Difference]: Start difference. First operand 476 states and 974 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:51,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:51,495 INFO L93 Difference]: Finished difference Result 715 states and 1416 transitions. [2021-02-19 18:25:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:25:51,495 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:51,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:51,497 INFO L225 Difference]: With dead ends: 715 [2021-02-19 18:25:51,497 INFO L226 Difference]: Without dead ends: 683 [2021-02-19 18:25:51,497 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=241, Invalid=2309, Unknown=0, NotChecked=0, Total=2550 [2021-02-19 18:25:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-02-19 18:25:51,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 477. [2021-02-19 18:25:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 477 states, 476 states have (on average 2.0504201680672267) internal successors, (976), 476 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) [2021-02-19 18:25:51,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 976 transitions. [2021-02-19 18:25:51,503 INFO L78 Accepts]: Start accepts. Automaton has 477 states and 976 transitions. Word has length 33 [2021-02-19 18:25:51,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:51,503 INFO L480 AbstractCegarLoop]: Abstraction has 477 states and 976 transitions. [2021-02-19 18:25:51,503 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 477 states and 976 transitions. [2021-02-19 18:25:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:51,504 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:51,504 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:51,718 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:51,718 INFO L428 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:51,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:51,718 INFO L82 PathProgramCache]: Analyzing trace with hash -1525738722, now seen corresponding path program 44 times [2021-02-19 18:25:51,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:51,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578386813] [2021-02-19 18:25:51,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:52,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578386813] [2021-02-19 18:25:52,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1625659018] [2021-02-19 18:25:52,039 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:25:52,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:25:52,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:52,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:52,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:52,313 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:52,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:52,314 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:52,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:52,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:52,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:52,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:52,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:52,477 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:52,477 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:52,477 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:52,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716493264] [2021-02-19 18:25:52,477 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:52,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:52,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:52,478 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:52,478 INFO L87 Difference]: Start difference. First operand 477 states and 976 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:54,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:54,266 INFO L93 Difference]: Finished difference Result 783 states and 1547 transitions. [2021-02-19 18:25:54,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:25:54,267 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:54,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:54,269 INFO L225 Difference]: With dead ends: 783 [2021-02-19 18:25:54,269 INFO L226 Difference]: Without dead ends: 739 [2021-02-19 18:25:54,270 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=294, Invalid=3012, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:25:54,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 739 states. [2021-02-19 18:25:54,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 739 to 473. [2021-02-19 18:25:54,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 473 states, 472 states have (on average 2.044491525423729) internal successors, (965), 472 states have internal predecessors, (965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:54,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 473 states to 473 states and 965 transitions. [2021-02-19 18:25:54,278 INFO L78 Accepts]: Start accepts. Automaton has 473 states and 965 transitions. Word has length 33 [2021-02-19 18:25:54,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:54,278 INFO L480 AbstractCegarLoop]: Abstraction has 473 states and 965 transitions. [2021-02-19 18:25:54,278 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:54,278 INFO L276 IsEmpty]: Start isEmpty. Operand 473 states and 965 transitions. [2021-02-19 18:25:54,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:54,279 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:54,279 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:54,486 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-02-19 18:25:54,486 INFO L428 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:54,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:54,486 INFO L82 PathProgramCache]: Analyzing trace with hash 2131512862, now seen corresponding path program 45 times [2021-02-19 18:25:54,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:54,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720874930] [2021-02-19 18:25:54,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:54,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:54,770 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:54,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720874930] [2021-02-19 18:25:54,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1452610209] [2021-02-19 18:25:54,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:54,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:25:54,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:54,791 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:54,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:55,008 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:55,009 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:55,009 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:55,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:55,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:55,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:55,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:55,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:25:55,199 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:55,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:55,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:55,199 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [474975862] [2021-02-19 18:25:55,199 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:55,199 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:55,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:55,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:55,200 INFO L87 Difference]: Start difference. First operand 473 states and 965 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:56,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:56,340 INFO L93 Difference]: Finished difference Result 605 states and 1217 transitions. [2021-02-19 18:25:56,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:25:56,341 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:56,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:56,343 INFO L225 Difference]: With dead ends: 605 [2021-02-19 18:25:56,343 INFO L226 Difference]: Without dead ends: 577 [2021-02-19 18:25:56,343 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=200, Invalid=1962, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:25:56,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-02-19 18:25:56,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 465. [2021-02-19 18:25:56,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.0452586206896552) internal successors, (949), 464 states have internal predecessors, (949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:56,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 949 transitions. [2021-02-19 18:25:56,349 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 949 transitions. Word has length 33 [2021-02-19 18:25:56,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:56,349 INFO L480 AbstractCegarLoop]: Abstraction has 465 states and 949 transitions. [2021-02-19 18:25:56,349 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:56,349 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 949 transitions. [2021-02-19 18:25:56,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:56,350 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:56,350 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:56,550 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:56,550 INFO L428 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:56,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:56,550 INFO L82 PathProgramCache]: Analyzing trace with hash 313169372, now seen corresponding path program 46 times [2021-02-19 18:25:56,551 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:56,551 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412915617] [2021-02-19 18:25:56,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:56,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412915617] [2021-02-19 18:25:56,892 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922345701] [2021-02-19 18:25:56,892 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:56,916 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:25:56,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:56,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:25:56,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:57,281 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:57,282 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:57,283 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:57,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:25:57,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:57,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:57,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:57,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:25:57,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:57,407 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:57,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:57,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613801754] [2021-02-19 18:25:57,408 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:57,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:57,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:57,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:57,408 INFO L87 Difference]: Start difference. First operand 465 states and 949 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:58,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:25:58,287 INFO L93 Difference]: Finished difference Result 583 states and 1167 transitions. [2021-02-19 18:25:58,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-02-19 18:25:58,288 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:25:58,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:25:58,289 INFO L225 Difference]: With dead ends: 583 [2021-02-19 18:25:58,289 INFO L226 Difference]: Without dead ends: 535 [2021-02-19 18:25:58,290 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 451 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=197, Invalid=1783, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:25:58,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2021-02-19 18:25:58,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 468. [2021-02-19 18:25:58,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 2.044967880085653) internal successors, (955), 467 states have internal predecessors, (955), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:25:58,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 955 transitions. [2021-02-19 18:25:58,296 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 955 transitions. Word has length 33 [2021-02-19 18:25:58,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:25:58,296 INFO L480 AbstractCegarLoop]: Abstraction has 468 states and 955 transitions. [2021-02-19 18:25:58,296 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:25:58,296 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 955 transitions. [2021-02-19 18:25:58,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:25:58,297 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:25:58,297 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:25:58,501 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:58,502 INFO L428 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:25:58,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:25:58,502 INFO L82 PathProgramCache]: Analyzing trace with hash 1698791962, now seen corresponding path program 47 times [2021-02-19 18:25:58,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:25:58,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850027828] [2021-02-19 18:25:58,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:25:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:25:58,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:58,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850027828] [2021-02-19 18:25:58,804 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165420241] [2021-02-19 18:25:58,804 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:25:58,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:25:58,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:25:58,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:25:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:25:59,110 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:25:59,111 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:25:59,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:25:59,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:25:59,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:25:59,122 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:25:59,122 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 18:25:59,238 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:25:59,238 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:25:59,238 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:25:59,239 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891288264] [2021-02-19 18:25:59,239 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:25:59,239 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:25:59,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:25:59,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:25:59,239 INFO L87 Difference]: Start difference. First operand 468 states and 955 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:00,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:00,894 INFO L93 Difference]: Finished difference Result 708 states and 1405 transitions. [2021-02-19 18:26:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:26:00,894 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:00,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:00,896 INFO L225 Difference]: With dead ends: 708 [2021-02-19 18:26:00,896 INFO L226 Difference]: Without dead ends: 613 [2021-02-19 18:26:00,896 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 882 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=336, Invalid=3086, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:26:00,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2021-02-19 18:26:00,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 483. [2021-02-19 18:26:00,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 483 states, 482 states have (on average 2.045643153526971) internal successors, (986), 482 states have internal predecessors, (986), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:00,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 483 states to 483 states and 986 transitions. [2021-02-19 18:26:00,903 INFO L78 Accepts]: Start accepts. Automaton has 483 states and 986 transitions. Word has length 33 [2021-02-19 18:26:00,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:00,903 INFO L480 AbstractCegarLoop]: Abstraction has 483 states and 986 transitions. [2021-02-19 18:26:00,903 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:00,903 INFO L276 IsEmpty]: Start isEmpty. Operand 483 states and 986 transitions. [2021-02-19 18:26:00,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:00,904 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:00,904 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:01,110 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-02-19 18:26:01,110 INFO L428 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:01,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:01,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1057681372, now seen corresponding path program 48 times [2021-02-19 18:26:01,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:01,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [721448733] [2021-02-19 18:26:01,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:01,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:01,445 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:01,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [721448733] [2021-02-19 18:26:01,446 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482032204] [2021-02-19 18:26:01,446 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 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 [2021-02-19 18:26:01,471 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:26:01,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:01,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:01,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:01,760 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:01,761 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:01,761 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:01,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:01,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:01,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:01,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:01,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:01,911 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:01,912 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:01,912 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:01,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270143337] [2021-02-19 18:26:01,912 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:01,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:01,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:01,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:01,913 INFO L87 Difference]: Start difference. First operand 483 states and 986 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:03,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:03,557 INFO L93 Difference]: Finished difference Result 736 states and 1461 transitions. [2021-02-19 18:26:03,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:26:03,557 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:03,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:03,559 INFO L225 Difference]: With dead ends: 736 [2021-02-19 18:26:03,559 INFO L226 Difference]: Without dead ends: 668 [2021-02-19 18:26:03,559 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=414, Invalid=3368, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:26:03,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 668 states. [2021-02-19 18:26:03,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 668 to 484. [2021-02-19 18:26:03,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.0455486542443064) internal successors, (988), 483 states have internal predecessors, (988), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:03,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 988 transitions. [2021-02-19 18:26:03,566 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 988 transitions. Word has length 33 [2021-02-19 18:26:03,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:03,566 INFO L480 AbstractCegarLoop]: Abstraction has 484 states and 988 transitions. [2021-02-19 18:26:03,566 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:03,566 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 988 transitions. [2021-02-19 18:26:03,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:03,567 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:03,567 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:03,782 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:03,782 INFO L428 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:03,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:03,782 INFO L82 PathProgramCache]: Analyzing trace with hash -1811043558, now seen corresponding path program 49 times [2021-02-19 18:26:03,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:03,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537203287] [2021-02-19 18:26:03,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:03,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:04,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537203287] [2021-02-19 18:26:04,118 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [483748154] [2021-02-19 18:26:04,118 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:26:04,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:04,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:04,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:04,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:04,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:04,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:04,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:04,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:04,447 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:04,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:04,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:04,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:04,629 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:04,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:04,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982751990] [2021-02-19 18:26:04,631 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:04,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:04,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:04,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:04,632 INFO L87 Difference]: Start difference. First operand 484 states and 988 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:07,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:07,012 INFO L93 Difference]: Finished difference Result 829 states and 1649 transitions. [2021-02-19 18:26:07,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:26:07,013 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:07,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:07,014 INFO L225 Difference]: With dead ends: 829 [2021-02-19 18:26:07,014 INFO L226 Difference]: Without dead ends: 753 [2021-02-19 18:26:07,014 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1452 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:26:07,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2021-02-19 18:26:07,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 497. [2021-02-19 18:26:07,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.0483870967741935) internal successors, (1016), 496 states have internal predecessors, (1016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:07,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1016 transitions. [2021-02-19 18:26:07,020 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1016 transitions. Word has length 33 [2021-02-19 18:26:07,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:07,020 INFO L480 AbstractCegarLoop]: Abstraction has 497 states and 1016 transitions. [2021-02-19 18:26:07,020 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:07,020 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1016 transitions. [2021-02-19 18:26:07,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:07,021 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:07,021 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:07,221 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-02-19 18:26:07,221 INFO L428 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:07,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:07,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1569290992, now seen corresponding path program 50 times [2021-02-19 18:26:07,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:07,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854768734] [2021-02-19 18:26:07,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:07,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:07,517 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:07,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854768734] [2021-02-19 18:26:07,517 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193210819] [2021-02-19 18:26:07,517 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:07,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:26:07,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:07,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:07,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:07,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:07,739 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:07,740 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:07,740 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:07,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:07,750 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:07,751 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:07,751 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:26:07,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:07,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:07,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:07,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882639209] [2021-02-19 18:26:07,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:07,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:07,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:07,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:07,931 INFO L87 Difference]: Start difference. First operand 497 states and 1016 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:09,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:09,526 INFO L93 Difference]: Finished difference Result 652 states and 1298 transitions. [2021-02-19 18:26:09,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:26:09,526 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:09,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:09,527 INFO L225 Difference]: With dead ends: 652 [2021-02-19 18:26:09,527 INFO L226 Difference]: Without dead ends: 596 [2021-02-19 18:26:09,528 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 952 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=362, Invalid=3420, Unknown=0, NotChecked=0, Total=3782 [2021-02-19 18:26:09,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2021-02-19 18:26:09,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 511. [2021-02-19 18:26:09,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.045098039215686) internal successors, (1043), 510 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:09,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1043 transitions. [2021-02-19 18:26:09,533 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1043 transitions. Word has length 33 [2021-02-19 18:26:09,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:09,533 INFO L480 AbstractCegarLoop]: Abstraction has 511 states and 1043 transitions. [2021-02-19 18:26:09,533 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:09,533 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1043 transitions. [2021-02-19 18:26:09,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:09,534 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:09,534 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:09,734 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-02-19 18:26:09,735 INFO L428 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:09,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:09,735 INFO L82 PathProgramCache]: Analyzing trace with hash -14145522, now seen corresponding path program 51 times [2021-02-19 18:26:09,735 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:09,735 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941981145] [2021-02-19 18:26:09,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:09,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:10,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:10,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941981145] [2021-02-19 18:26:10,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409909958] [2021-02-19 18:26:10,066 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 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 [2021-02-19 18:26:10,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:26:10,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:10,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:10,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:10,384 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:10,385 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:10,386 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:10,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:10,387 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:10,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:10,396 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:10,396 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:10,514 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:10,515 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:10,515 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:10,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606360911] [2021-02-19 18:26:10,515 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:10,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:10,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:10,516 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:10,516 INFO L87 Difference]: Start difference. First operand 511 states and 1043 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:11,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:11,584 INFO L93 Difference]: Finished difference Result 637 states and 1276 transitions. [2021-02-19 18:26:11,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:26:11,584 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:11,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:11,586 INFO L225 Difference]: With dead ends: 637 [2021-02-19 18:26:11,586 INFO L226 Difference]: Without dead ends: 589 [2021-02-19 18:26:11,586 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=195, Invalid=1785, Unknown=0, NotChecked=0, Total=1980 [2021-02-19 18:26:11,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 589 states. [2021-02-19 18:26:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 589 to 515. [2021-02-19 18:26:11,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.044747081712062) internal successors, (1051), 514 states have internal predecessors, (1051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1051 transitions. [2021-02-19 18:26:11,591 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1051 transitions. Word has length 33 [2021-02-19 18:26:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:11,591 INFO L480 AbstractCegarLoop]: Abstraction has 515 states and 1051 transitions. [2021-02-19 18:26:11,592 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:11,592 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1051 transitions. [2021-02-19 18:26:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:11,592 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:11,592 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:11,793 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-02-19 18:26:11,794 INFO L428 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:11,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:11,794 INFO L82 PathProgramCache]: Analyzing trace with hash 1371477068, now seen corresponding path program 52 times [2021-02-19 18:26:11,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:11,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96766034] [2021-02-19 18:26:11,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:11,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:12,108 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:12,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96766034] [2021-02-19 18:26:12,108 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651856949] [2021-02-19 18:26:12,108 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 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 [2021-02-19 18:26:12,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:26:12,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:12,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:12,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:12,417 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:12,417 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:12,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:12,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:12,429 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:12,430 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:12,430 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:12,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:12,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:12,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:12,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082883046] [2021-02-19 18:26:12,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:12,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:12,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:12,547 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:12,547 INFO L87 Difference]: Start difference. First operand 515 states and 1051 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:14,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:14,232 INFO L93 Difference]: Finished difference Result 764 states and 1519 transitions. [2021-02-19 18:26:14,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:26:14,233 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:14,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:14,234 INFO L225 Difference]: With dead ends: 764 [2021-02-19 18:26:14,234 INFO L226 Difference]: Without dead ends: 669 [2021-02-19 18:26:14,234 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 955 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=345, Invalid=3195, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:26:14,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-02-19 18:26:14,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 531. [2021-02-19 18:26:14,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 531 states, 530 states have (on average 2.047169811320755) internal successors, (1085), 530 states have internal predecessors, (1085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:14,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 531 states to 531 states and 1085 transitions. [2021-02-19 18:26:14,240 INFO L78 Accepts]: Start accepts. Automaton has 531 states and 1085 transitions. Word has length 33 [2021-02-19 18:26:14,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:14,240 INFO L480 AbstractCegarLoop]: Abstraction has 531 states and 1085 transitions. [2021-02-19 18:26:14,240 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:14,240 INFO L276 IsEmpty]: Start isEmpty. Operand 531 states and 1085 transitions. [2021-02-19 18:26:14,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:14,241 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:14,241 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:14,441 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-02-19 18:26:14,441 INFO L428 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:14,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:14,442 INFO L82 PathProgramCache]: Analyzing trace with hash 730366478, now seen corresponding path program 53 times [2021-02-19 18:26:14,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:14,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431202624] [2021-02-19 18:26:14,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:14,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:14,736 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:14,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431202624] [2021-02-19 18:26:14,736 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555126931] [2021-02-19 18:26:14,736 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:14,757 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:26:14,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:14,758 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:14,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:14,991 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:14,992 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:14,992 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:14,993 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:14,994 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:15,004 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:15,006 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:15,006 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:15,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:15,146 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:15,146 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:15,146 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328895866] [2021-02-19 18:26:15,146 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:15,146 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:15,147 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:15,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:15,147 INFO L87 Difference]: Start difference. First operand 531 states and 1085 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:17,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:17,201 INFO L93 Difference]: Finished difference Result 788 states and 1566 transitions. [2021-02-19 18:26:17,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:26:17,201 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:17,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:17,203 INFO L225 Difference]: With dead ends: 788 [2021-02-19 18:26:17,203 INFO L226 Difference]: Without dead ends: 720 [2021-02-19 18:26:17,203 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1236 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=471, Invalid=3951, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:26:17,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2021-02-19 18:26:17,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 532. [2021-02-19 18:26:17,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 532 states, 531 states have (on average 2.0451977401129944) internal successors, (1086), 531 states have internal predecessors, (1086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:17,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 532 states to 532 states and 1086 transitions. [2021-02-19 18:26:17,212 INFO L78 Accepts]: Start accepts. Automaton has 532 states and 1086 transitions. Word has length 33 [2021-02-19 18:26:17,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:17,212 INFO L480 AbstractCegarLoop]: Abstraction has 532 states and 1086 transitions. [2021-02-19 18:26:17,212 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:17,212 INFO L276 IsEmpty]: Start isEmpty. Operand 532 states and 1086 transitions. [2021-02-19 18:26:17,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:17,213 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:17,213 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:17,434 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:17,435 INFO L428 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:17,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:17,435 INFO L82 PathProgramCache]: Analyzing trace with hash -2138358452, now seen corresponding path program 54 times [2021-02-19 18:26:17,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:17,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837319213] [2021-02-19 18:26:17,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:17,735 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:17,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837319213] [2021-02-19 18:26:17,735 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123973482] [2021-02-19 18:26:17,735 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 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 [2021-02-19 18:26:17,755 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:26:17,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:17,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:26:17,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:17,983 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:17,984 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:17,985 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:17,985 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:17,986 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:17,994 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:17,995 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:17,995 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:18,135 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:18,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:18,136 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:18,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273830972] [2021-02-19 18:26:18,136 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:18,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:18,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:18,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=775, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:18,137 INFO L87 Difference]: Start difference. First operand 532 states and 1086 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:20,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:20,911 INFO L93 Difference]: Finished difference Result 888 states and 1768 transitions. [2021-02-19 18:26:20,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-02-19 18:26:20,912 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:20,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:20,913 INFO L225 Difference]: With dead ends: 888 [2021-02-19 18:26:20,913 INFO L226 Difference]: Without dead ends: 812 [2021-02-19 18:26:20,914 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1869 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=616, Invalid=5704, Unknown=0, NotChecked=0, Total=6320 [2021-02-19 18:26:20,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 812 states. [2021-02-19 18:26:20,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 812 to 540. [2021-02-19 18:26:20,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 540 states, 539 states have (on average 2.038961038961039) internal successors, (1099), 539 states have internal predecessors, (1099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:20,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 540 states to 540 states and 1099 transitions. [2021-02-19 18:26:20,921 INFO L78 Accepts]: Start accepts. Automaton has 540 states and 1099 transitions. Word has length 33 [2021-02-19 18:26:20,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:20,921 INFO L480 AbstractCegarLoop]: Abstraction has 540 states and 1099 transitions. [2021-02-19 18:26:20,921 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:20,922 INFO L276 IsEmpty]: Start isEmpty. Operand 540 states and 1099 transitions. [2021-02-19 18:26:20,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:20,922 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:20,922 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:21,122 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:21,123 INFO L428 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1241976098, now seen corresponding path program 55 times [2021-02-19 18:26:21,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:21,123 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2016806029] [2021-02-19 18:26:21,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:21,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:21,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:21,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2016806029] [2021-02-19 18:26:21,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407696985] [2021-02-19 18:26:21,419 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 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 [2021-02-19 18:26:21,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:21,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:21,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:21,652 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:21,653 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:21,653 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:21,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:21,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:21,664 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:21,672 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:21,673 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:26:21,850 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:21,851 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:21,851 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:21,851 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025588184] [2021-02-19 18:26:21,851 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:21,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:21,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:21,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:21,851 INFO L87 Difference]: Start difference. First operand 540 states and 1099 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:23,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:23,328 INFO L93 Difference]: Finished difference Result 715 states and 1420 transitions. [2021-02-19 18:26:23,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:26:23,329 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:23,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:23,330 INFO L225 Difference]: With dead ends: 715 [2021-02-19 18:26:23,330 INFO L226 Difference]: Without dead ends: 659 [2021-02-19 18:26:23,330 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 939 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=354, Invalid=3306, Unknown=0, NotChecked=0, Total=3660 [2021-02-19 18:26:23,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 659 states. [2021-02-19 18:26:23,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 659 to 544. [2021-02-19 18:26:23,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 543 states have (on average 2.0386740331491713) internal successors, (1107), 543 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:23,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 1107 transitions. [2021-02-19 18:26:23,337 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 1107 transitions. Word has length 33 [2021-02-19 18:26:23,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:23,337 INFO L480 AbstractCegarLoop]: Abstraction has 544 states and 1107 transitions. [2021-02-19 18:26:23,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:23,337 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 1107 transitions. [2021-02-19 18:26:23,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:23,337 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:23,338 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:23,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:23,538 INFO L428 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:23,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:23,538 INFO L82 PathProgramCache]: Analyzing trace with hash 1245392376, now seen corresponding path program 56 times [2021-02-19 18:26:23,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:23,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221401809] [2021-02-19 18:26:23,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:23,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:23,926 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:23,926 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221401809] [2021-02-19 18:26:23,927 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191639519] [2021-02-19 18:26:23,927 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:26:23,960 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:26:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:24,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:24,249 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:24,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:24,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:24,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:24,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:24,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:24,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:24,382 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:24,382 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:24,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763393779] [2021-02-19 18:26:24,382 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:24,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:24,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:24,383 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:24,383 INFO L87 Difference]: Start difference. First operand 544 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:26,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:26,371 INFO L93 Difference]: Finished difference Result 766 states and 1515 transitions. [2021-02-19 18:26:26,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-02-19 18:26:26,372 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:26,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:26,373 INFO L225 Difference]: With dead ends: 766 [2021-02-19 18:26:26,373 INFO L226 Difference]: Without dead ends: 678 [2021-02-19 18:26:26,373 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1221 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=399, Invalid=4023, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:26:26,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 678 states. [2021-02-19 18:26:26,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 678 to 570. [2021-02-19 18:26:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 569 states have (on average 2.0369068541300526) internal successors, (1159), 569 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 1159 transitions. [2021-02-19 18:26:26,381 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 1159 transitions. Word has length 33 [2021-02-19 18:26:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:26,381 INFO L480 AbstractCegarLoop]: Abstraction has 570 states and 1159 transitions. [2021-02-19 18:26:26,381 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 1159 transitions. [2021-02-19 18:26:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:26,381 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:26,382 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:26,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2021-02-19 18:26:26,582 INFO L428 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:26,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:26,582 INFO L82 PathProgramCache]: Analyzing trace with hash 604281786, now seen corresponding path program 57 times [2021-02-19 18:26:26,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:26,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883159193] [2021-02-19 18:26:26,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:26,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:26,891 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883159193] [2021-02-19 18:26:26,891 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88313089] [2021-02-19 18:26:26,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:26:26,911 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:26:26,911 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:26,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:26,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:27,148 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:27,149 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:27,149 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:27,150 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:27,151 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:27,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:27,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:27,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:27,303 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:27,303 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:27,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912183058] [2021-02-19 18:26:27,303 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:27,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:27,304 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:27,304 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:27,304 INFO L87 Difference]: Start difference. First operand 570 states and 1159 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:29,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:29,275 INFO L93 Difference]: Finished difference Result 771 states and 1529 transitions. [2021-02-19 18:26:29,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:26:29,275 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:29,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:29,276 INFO L225 Difference]: With dead ends: 771 [2021-02-19 18:26:29,276 INFO L226 Difference]: Without dead ends: 707 [2021-02-19 18:26:29,277 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1238 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=431, Invalid=3991, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:26:29,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 707 states. [2021-02-19 18:26:29,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 707 to 571. [2021-02-19 18:26:29,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.0350877192982457) internal successors, (1160), 570 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:29,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1160 transitions. [2021-02-19 18:26:29,284 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1160 transitions. Word has length 33 [2021-02-19 18:26:29,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:29,284 INFO L480 AbstractCegarLoop]: Abstraction has 571 states and 1160 transitions. [2021-02-19 18:26:29,284 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:29,284 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1160 transitions. [2021-02-19 18:26:29,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:29,285 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:29,285 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:29,497 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:29,498 INFO L428 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:29,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:29,498 INFO L82 PathProgramCache]: Analyzing trace with hash 2030524152, now seen corresponding path program 58 times [2021-02-19 18:26:29,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:29,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526795216] [2021-02-19 18:26:29,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:29,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:29,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526795216] [2021-02-19 18:26:29,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762279194] [2021-02-19 18:26:29,828 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 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 [2021-02-19 18:26:29,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:26:29,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:29,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:29,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:30,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:30,086 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:30,087 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:30,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:30,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:30,096 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:30,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:30,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:30,239 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:30,240 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:30,240 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972571033] [2021-02-19 18:26:30,240 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:30,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:30,240 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:30,240 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=780, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:30,240 INFO L87 Difference]: Start difference. First operand 571 states and 1160 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:32,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:32,727 INFO L93 Difference]: Finished difference Result 823 states and 1634 transitions. [2021-02-19 18:26:32,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:26:32,727 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:32,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:32,729 INFO L225 Difference]: With dead ends: 823 [2021-02-19 18:26:32,729 INFO L226 Difference]: Without dead ends: 767 [2021-02-19 18:26:32,729 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1560 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=521, Invalid=4881, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:26:32,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 767 states. [2021-02-19 18:26:32,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 767 to 567. [2021-02-19 18:26:32,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 567 states, 566 states have (on average 2.030035335689046) internal successors, (1149), 566 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:32,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 567 states to 567 states and 1149 transitions. [2021-02-19 18:26:32,737 INFO L78 Accepts]: Start accepts. Automaton has 567 states and 1149 transitions. Word has length 33 [2021-02-19 18:26:32,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:32,737 INFO L480 AbstractCegarLoop]: Abstraction has 567 states and 1149 transitions. [2021-02-19 18:26:32,737 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:32,737 INFO L276 IsEmpty]: Start isEmpty. Operand 567 states and 1149 transitions. [2021-02-19 18:26:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:32,738 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:32,738 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:32,950 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-02-19 18:26:32,950 INFO L428 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:32,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:32,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1925677534, now seen corresponding path program 59 times [2021-02-19 18:26:32,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:32,951 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922740810] [2021-02-19 18:26:32,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:32,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:33,336 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922740810] [2021-02-19 18:26:33,336 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91420338] [2021-02-19 18:26:33,336 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 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:26:33,368 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:26:33,368 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:33,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:33,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:33,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:33,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:33,605 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:33,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:33,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:33,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:33,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:33,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:26:33,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:33,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:33,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 29 [2021-02-19 18:26:33,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [344141861] [2021-02-19 18:26:33,855 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:26:33,856 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:33,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:26:33,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=781, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:26:33,856 INFO L87 Difference]: Start difference. First operand 567 states and 1149 transitions. Second operand has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:35,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:35,595 INFO L93 Difference]: Finished difference Result 729 states and 1442 transitions. [2021-02-19 18:26:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:26:35,596 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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 33 [2021-02-19 18:26:35,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:35,597 INFO L225 Difference]: With dead ends: 729 [2021-02-19 18:26:35,597 INFO L226 Difference]: Without dead ends: 673 [2021-02-19 18:26:35,597 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 20 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=385, Invalid=3521, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:26:35,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2021-02-19 18:26:35,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 573. [2021-02-19 18:26:35,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.0262237762237763) internal successors, (1159), 572 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:35,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1159 transitions. [2021-02-19 18:26:35,603 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1159 transitions. Word has length 33 [2021-02-19 18:26:35,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:35,603 INFO L480 AbstractCegarLoop]: Abstraction has 573 states and 1159 transitions. [2021-02-19 18:26:35,603 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9333333333333333) internal successors, (58), 29 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) [2021-02-19 18:26:35,603 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1159 transitions. [2021-02-19 18:26:35,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:35,604 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:35,604 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:35,804 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:35,804 INFO L428 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:35,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:35,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1180290914, now seen corresponding path program 60 times [2021-02-19 18:26:35,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:35,805 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778454571] [2021-02-19 18:26:35,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:35,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:36,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778454571] [2021-02-19 18:26:36,079 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085042853] [2021-02-19 18:26:36,079 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:36,099 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:26:36,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:36,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:26:36,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:36,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:36,436 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:36,436 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:36,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:26:36,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:36,445 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:36,446 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:36,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:37, output treesize:13 [2021-02-19 18:26:36,572 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:36,572 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:36,572 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:36,572 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170151150] [2021-02-19 18:26:36,572 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:36,572 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:36,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:36,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:36,573 INFO L87 Difference]: Start difference. First operand 573 states and 1159 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:37,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:37,504 INFO L93 Difference]: Finished difference Result 722 states and 1426 transitions. [2021-02-19 18:26:37,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:26:37,505 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:37,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:37,506 INFO L225 Difference]: With dead ends: 722 [2021-02-19 18:26:37,506 INFO L226 Difference]: Without dead ends: 674 [2021-02-19 18:26:37,506 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=194, Invalid=1968, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:26:37,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 674 states. [2021-02-19 18:26:37,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 674 to 588. [2021-02-19 18:26:37,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 588 states, 587 states have (on average 2.0306643952299828) internal successors, (1192), 587 states have internal predecessors, (1192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:37,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 588 states to 588 states and 1192 transitions. [2021-02-19 18:26:37,513 INFO L78 Accepts]: Start accepts. Automaton has 588 states and 1192 transitions. Word has length 33 [2021-02-19 18:26:37,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:37,513 INFO L480 AbstractCegarLoop]: Abstraction has 588 states and 1192 transitions. [2021-02-19 18:26:37,513 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:37,513 INFO L276 IsEmpty]: Start isEmpty. Operand 588 states and 1192 transitions. [2021-02-19 18:26:37,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:37,514 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:37,514 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:37,714 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-02-19 18:26:37,714 INFO L428 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:37,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:37,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1835304668, now seen corresponding path program 61 times [2021-02-19 18:26:37,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:37,715 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526113524] [2021-02-19 18:26:37,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:37,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:38,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:38,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526113524] [2021-02-19 18:26:38,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401653767] [2021-02-19 18:26:38,016 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 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 [2021-02-19 18:26:38,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:38,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:38,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:38,387 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:38,388 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:38,388 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:38,389 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:38,390 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:38,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:38,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:38,399 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:38,525 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:38,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:38,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:38,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340590732] [2021-02-19 18:26:38,526 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:38,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:38,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:38,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:38,527 INFO L87 Difference]: Start difference. First operand 588 states and 1192 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:39,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:39,625 INFO L93 Difference]: Finished difference Result 759 states and 1493 transitions. [2021-02-19 18:26:39,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:26:39,626 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:39,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:39,627 INFO L225 Difference]: With dead ends: 759 [2021-02-19 18:26:39,627 INFO L226 Difference]: Without dead ends: 711 [2021-02-19 18:26:39,627 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=193, Invalid=1969, Unknown=0, NotChecked=0, Total=2162 [2021-02-19 18:26:39,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-02-19 18:26:39,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 589. [2021-02-19 18:26:39,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 588 states have (on average 2.0306122448979593) internal successors, (1194), 588 states have internal predecessors, (1194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:39,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 1194 transitions. [2021-02-19 18:26:39,633 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 1194 transitions. Word has length 33 [2021-02-19 18:26:39,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:39,634 INFO L480 AbstractCegarLoop]: Abstraction has 589 states and 1194 transitions. [2021-02-19 18:26:39,634 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:39,634 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 1194 transitions. [2021-02-19 18:26:39,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:39,634 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:39,635 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:39,835 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:39,835 INFO L428 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:39,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:39,835 INFO L82 PathProgramCache]: Analyzing trace with hash -449682078, now seen corresponding path program 62 times [2021-02-19 18:26:39,835 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:39,835 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389446068] [2021-02-19 18:26:39,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:39,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:40,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:40,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389446068] [2021-02-19 18:26:40,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1529842361] [2021-02-19 18:26:40,120 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 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 [2021-02-19 18:26:40,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:26:40,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:40,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:40,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:40,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:40,479 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:40,479 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:40,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:40,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:40,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:40,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:40,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:40,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:40,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:40,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449240618] [2021-02-19 18:26:40,620 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:40,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:40,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:40,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:40,621 INFO L87 Difference]: Start difference. First operand 589 states and 1194 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:41,854 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:41,854 INFO L93 Difference]: Finished difference Result 797 states and 1571 transitions. [2021-02-19 18:26:41,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:26:41,855 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:41,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:41,856 INFO L225 Difference]: With dead ends: 797 [2021-02-19 18:26:41,856 INFO L226 Difference]: Without dead ends: 749 [2021-02-19 18:26:41,856 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=205, Invalid=2147, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:26:41,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 749 states. [2021-02-19 18:26:41,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 749 to 593. [2021-02-19 18:26:41,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 593 states, 592 states have (on average 2.0304054054054053) internal successors, (1202), 592 states have internal predecessors, (1202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:41,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 593 states to 593 states and 1202 transitions. [2021-02-19 18:26:41,863 INFO L78 Accepts]: Start accepts. Automaton has 593 states and 1202 transitions. Word has length 33 [2021-02-19 18:26:41,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:41,863 INFO L480 AbstractCegarLoop]: Abstraction has 593 states and 1202 transitions. [2021-02-19 18:26:41,863 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:41,863 INFO L276 IsEmpty]: Start isEmpty. Operand 593 states and 1202 transitions. [2021-02-19 18:26:41,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:41,863 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:41,864 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:42,064 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-02-19 18:26:42,064 INFO L428 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:42,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:42,064 INFO L82 PathProgramCache]: Analyzing trace with hash -1090792668, now seen corresponding path program 63 times [2021-02-19 18:26:42,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:42,065 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991093406] [2021-02-19 18:26:42,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991093406] [2021-02-19 18:26:42,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025743167] [2021-02-19 18:26:42,339 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:42,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:26:42,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:42,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:42,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:42,648 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:42,648 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:42,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:42,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:42,659 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:42,660 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:42,660 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:42,832 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:42,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:42,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:42,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228728795] [2021-02-19 18:26:42,833 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:42,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:42,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:42,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:42,834 INFO L87 Difference]: Start difference. First operand 593 states and 1202 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:44,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:44,404 INFO L93 Difference]: Finished difference Result 830 states and 1640 transitions. [2021-02-19 18:26:44,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:26:44,405 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:44,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:44,406 INFO L225 Difference]: With dead ends: 830 [2021-02-19 18:26:44,406 INFO L226 Difference]: Without dead ends: 798 [2021-02-19 18:26:44,407 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 621 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=242, Invalid=2410, Unknown=0, NotChecked=0, Total=2652 [2021-02-19 18:26:44,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 798 states. [2021-02-19 18:26:44,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 798 to 594. [2021-02-19 18:26:44,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 594 states, 593 states have (on average 2.03035413153457) internal successors, (1204), 593 states have internal predecessors, (1204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:44,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 594 states to 594 states and 1204 transitions. [2021-02-19 18:26:44,416 INFO L78 Accepts]: Start accepts. Automaton has 594 states and 1204 transitions. Word has length 33 [2021-02-19 18:26:44,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:44,416 INFO L480 AbstractCegarLoop]: Abstraction has 594 states and 1204 transitions. [2021-02-19 18:26:44,416 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:44,416 INFO L276 IsEmpty]: Start isEmpty. Operand 594 states and 1204 transitions. [2021-02-19 18:26:44,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:44,417 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:44,418 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:44,631 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-02-19 18:26:44,631 INFO L428 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:44,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:44,632 INFO L82 PathProgramCache]: Analyzing trace with hash 335449698, now seen corresponding path program 64 times [2021-02-19 18:26:44,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:44,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916751084] [2021-02-19 18:26:44,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:44,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:44,923 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:44,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916751084] [2021-02-19 18:26:44,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011445087] [2021-02-19 18:26:44,924 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 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 [2021-02-19 18:26:44,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:26:44,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:44,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:44,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:45,263 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:45,264 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:45,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:45,266 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:45,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:45,275 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:45,275 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:45,437 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:45,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:45,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:45,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048411237] [2021-02-19 18:26:45,438 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:45,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:45,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:45,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:45,439 INFO L87 Difference]: Start difference. First operand 594 states and 1204 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:47,367 INFO L93 Difference]: Finished difference Result 897 states and 1769 transitions. [2021-02-19 18:26:47,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:26:47,367 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:47,369 INFO L225 Difference]: With dead ends: 897 [2021-02-19 18:26:47,369 INFO L226 Difference]: Without dead ends: 853 [2021-02-19 18:26:47,370 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:26:47,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2021-02-19 18:26:47,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 590. [2021-02-19 18:26:47,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 590 states, 589 states have (on average 2.025466893039049) internal successors, (1193), 589 states have internal predecessors, (1193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:47,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 590 states to 590 states and 1193 transitions. [2021-02-19 18:26:47,380 INFO L78 Accepts]: Start accepts. Automaton has 590 states and 1193 transitions. Word has length 33 [2021-02-19 18:26:47,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:47,380 INFO L480 AbstractCegarLoop]: Abstraction has 590 states and 1193 transitions. [2021-02-19 18:26:47,380 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:47,380 INFO L276 IsEmpty]: Start isEmpty. Operand 590 states and 1193 transitions. [2021-02-19 18:26:47,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:47,381 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:47,381 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:47,603 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:47,603 INFO L428 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:47,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:47,603 INFO L82 PathProgramCache]: Analyzing trace with hash -302266014, now seen corresponding path program 65 times [2021-02-19 18:26:47,604 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:47,604 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42280969] [2021-02-19 18:26:47,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:47,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:47,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42280969] [2021-02-19 18:26:47,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819207634] [2021-02-19 18:26:47,949 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 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 [2021-02-19 18:26:47,971 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:26:47,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:47,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:47,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:48,222 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:48,223 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:48,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:48,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:48,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:48,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:48,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:26:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:48,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:48,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:48,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546561023] [2021-02-19 18:26:48,434 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:48,434 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:48,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:48,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:48,434 INFO L87 Difference]: Start difference. First operand 590 states and 1193 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:49,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:49,439 INFO L93 Difference]: Finished difference Result 720 states and 1441 transitions. [2021-02-19 18:26:49,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:26:49,440 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:49,440 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:49,441 INFO L225 Difference]: With dead ends: 720 [2021-02-19 18:26:49,441 INFO L226 Difference]: Without dead ends: 692 [2021-02-19 18:26:49,441 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:26:49,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 692 states. [2021-02-19 18:26:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 692 to 582. [2021-02-19 18:26:49,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 581 states have (on average 2.025817555938038) internal successors, (1177), 581 states have internal predecessors, (1177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 1177 transitions. [2021-02-19 18:26:49,447 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 1177 transitions. Word has length 33 [2021-02-19 18:26:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:49,447 INFO L480 AbstractCegarLoop]: Abstraction has 582 states and 1177 transitions. [2021-02-19 18:26:49,447 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 1177 transitions. [2021-02-19 18:26:49,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:49,447 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:49,447 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:49,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:49,648 INFO L428 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:49,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:49,648 INFO L82 PathProgramCache]: Analyzing trace with hash -2120609504, now seen corresponding path program 66 times [2021-02-19 18:26:49,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:49,648 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011192997] [2021-02-19 18:26:49,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:49,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:50,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:50,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011192997] [2021-02-19 18:26:50,016 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040199837] [2021-02-19 18:26:50,016 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:50,043 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:26:50,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:50,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:26:50,044 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:50,433 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:50,434 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:50,435 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:50,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:50,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:50,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:50,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:50,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:50,597 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:50,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:50,597 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:50,597 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175061738] [2021-02-19 18:26:50,597 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:50,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:50,598 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:50,598 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:50,598 INFO L87 Difference]: Start difference. First operand 582 states and 1177 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:51,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:51,919 INFO L93 Difference]: Finished difference Result 760 states and 1501 transitions. [2021-02-19 18:26:51,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:26:51,920 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:51,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:51,921 INFO L225 Difference]: With dead ends: 760 [2021-02-19 18:26:51,921 INFO L226 Difference]: Without dead ends: 664 [2021-02-19 18:26:51,922 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 839 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=277, Invalid=2915, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:26:51,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2021-02-19 18:26:51,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 596. [2021-02-19 18:26:51,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 596 states, 595 states have (on average 2.030252100840336) internal successors, (1208), 595 states have internal predecessors, (1208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:51,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 596 states to 596 states and 1208 transitions. [2021-02-19 18:26:51,928 INFO L78 Accepts]: Start accepts. Automaton has 596 states and 1208 transitions. Word has length 33 [2021-02-19 18:26:51,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:51,928 INFO L480 AbstractCegarLoop]: Abstraction has 596 states and 1208 transitions. [2021-02-19 18:26:51,928 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:51,928 INFO L276 IsEmpty]: Start isEmpty. Operand 596 states and 1208 transitions. [2021-02-19 18:26:51,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:51,929 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:51,929 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:52,129 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-02-19 18:26:52,130 INFO L428 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:52,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:52,130 INFO L82 PathProgramCache]: Analyzing trace with hash -734986914, now seen corresponding path program 67 times [2021-02-19 18:26:52,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:52,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334948244] [2021-02-19 18:26:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:52,509 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:52,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334948244] [2021-02-19 18:26:52,509 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784010139] [2021-02-19 18:26:52,509 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-02-19 18:26:52,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:52,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:52,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:52,925 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:52,925 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:52,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:52,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:52,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:52,937 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:52,937 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:53,073 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:53,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:53,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:53,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466704930] [2021-02-19 18:26:53,073 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:53,073 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:53,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:53,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=840, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:53,074 INFO L87 Difference]: Start difference. First operand 596 states and 1208 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:54,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:54,944 INFO L93 Difference]: Finished difference Result 806 states and 1598 transitions. [2021-02-19 18:26:54,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-02-19 18:26:54,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:54,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:54,946 INFO L225 Difference]: With dead ends: 806 [2021-02-19 18:26:54,946 INFO L226 Difference]: Without dead ends: 711 [2021-02-19 18:26:54,947 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 928 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=334, Invalid=3206, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:26:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 711 states. [2021-02-19 18:26:54,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 711 to 599. [2021-02-19 18:26:54,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 598 states have (on average 2.0250836120401337) internal successors, (1211), 598 states have internal predecessors, (1211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:54,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 1211 transitions. [2021-02-19 18:26:54,956 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 1211 transitions. Word has length 33 [2021-02-19 18:26:54,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:54,956 INFO L480 AbstractCegarLoop]: Abstraction has 599 states and 1211 transitions. [2021-02-19 18:26:54,956 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:54,956 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 1211 transitions. [2021-02-19 18:26:54,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:54,957 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:54,957 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:55,169 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:26:55,170 INFO L428 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:55,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:55,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1376097504, now seen corresponding path program 68 times [2021-02-19 18:26:55,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:55,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339938900] [2021-02-19 18:26:55,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:55,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:55,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339938900] [2021-02-19 18:26:55,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1214849228] [2021-02-19 18:26:55,519 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 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 [2021-02-19 18:26:55,539 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:26:55,539 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:55,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:55,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:55,837 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:55,839 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:55,839 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:55,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:55,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:55,850 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:55,852 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:55,852 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:56,009 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:56,010 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:56,010 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:56,010 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315598040] [2021-02-19 18:26:56,010 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:56,010 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:56,010 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:56,010 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:56,011 INFO L87 Difference]: Start difference. First operand 599 states and 1211 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:58,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:26:58,030 INFO L93 Difference]: Finished difference Result 830 states and 1647 transitions. [2021-02-19 18:26:58,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:26:58,031 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:26:58,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:26:58,032 INFO L225 Difference]: With dead ends: 830 [2021-02-19 18:26:58,032 INFO L226 Difference]: Without dead ends: 762 [2021-02-19 18:26:58,033 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1042 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=412, Invalid=3494, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:26:58,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-02-19 18:26:58,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 600. [2021-02-19 18:26:58,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 599 states have (on average 2.025041736227045) internal successors, (1213), 599 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:26:58,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 1213 transitions. [2021-02-19 18:26:58,039 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 1213 transitions. Word has length 33 [2021-02-19 18:26:58,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:26:58,039 INFO L480 AbstractCegarLoop]: Abstraction has 600 states and 1213 transitions. [2021-02-19 18:26:58,039 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:26:58,039 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 1213 transitions. [2021-02-19 18:26:58,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:26:58,040 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:26:58,040 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:26:58,240 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-02-19 18:26:58,240 INFO L428 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:26:58,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:26:58,241 INFO L82 PathProgramCache]: Analyzing trace with hash 50144862, now seen corresponding path program 69 times [2021-02-19 18:26:58,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:26:58,241 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578985865] [2021-02-19 18:26:58,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:26:58,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:26:58,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:58,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578985865] [2021-02-19 18:26:58,534 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008062718] [2021-02-19 18:26:58,534 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 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 [2021-02-19 18:26:58,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:26:58,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:26:58,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:26:58,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:26:58,861 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:26:58,861 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:26:58,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:26:58,863 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:26:58,871 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:26:58,872 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:26:58,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:26:59,043 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:26:59,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:26:59,044 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:26:59,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667321247] [2021-02-19 18:26:59,044 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:26:59,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:26:59,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:26:59,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:26:59,044 INFO L87 Difference]: Start difference. First operand 600 states and 1213 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:01,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:01,510 INFO L93 Difference]: Finished difference Result 939 states and 1863 transitions. [2021-02-19 18:27:01,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-02-19 18:27:01,511 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:01,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:01,512 INFO L225 Difference]: With dead ends: 939 [2021-02-19 18:27:01,512 INFO L226 Difference]: Without dead ends: 863 [2021-02-19 18:27:01,513 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1513 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=540, Invalid=4862, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:27:01,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-02-19 18:27:01,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 602. [2021-02-19 18:27:01,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 602 states, 601 states have (on average 2.0232945091514143) internal successors, (1216), 601 states have internal predecessors, (1216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:01,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 602 states to 602 states and 1216 transitions. [2021-02-19 18:27:01,520 INFO L78 Accepts]: Start accepts. Automaton has 602 states and 1216 transitions. Word has length 33 [2021-02-19 18:27:01,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:01,521 INFO L480 AbstractCegarLoop]: Abstraction has 602 states and 1216 transitions. [2021-02-19 18:27:01,521 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:01,521 INFO L276 IsEmpty]: Start isEmpty. Operand 602 states and 1216 transitions. [2021-02-19 18:27:01,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:01,522 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:01,522 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:01,737 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:01,738 INFO L428 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:01,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:01,738 INFO L82 PathProgramCache]: Analyzing trace with hash -864487884, now seen corresponding path program 70 times [2021-02-19 18:27:01,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:01,738 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665240616] [2021-02-19 18:27:01,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:01,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:02,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665240616] [2021-02-19 18:27:02,054 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2027446838] [2021-02-19 18:27:02,054 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 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 [2021-02-19 18:27:02,073 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:27:02,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:02,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:02,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:02,328 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:02,329 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:02,330 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:02,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:02,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:02,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:02,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:02,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:27:02,545 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:02,546 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:02,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:02,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653049567] [2021-02-19 18:27:02,546 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:02,546 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:02,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:02,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=841, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:02,547 INFO L87 Difference]: Start difference. First operand 602 states and 1216 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:04,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:04,118 INFO L93 Difference]: Finished difference Result 762 states and 1508 transitions. [2021-02-19 18:27:04,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-02-19 18:27:04,119 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:04,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:04,120 INFO L225 Difference]: With dead ends: 762 [2021-02-19 18:27:04,120 INFO L226 Difference]: Without dead ends: 706 [2021-02-19 18:27:04,121 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1001 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=359, Invalid=3547, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:27:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-02-19 18:27:04,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 595. [2021-02-19 18:27:04,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 595 states, 594 states have (on average 2.025252525252525) internal successors, (1203), 594 states have internal predecessors, (1203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:04,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 595 states to 595 states and 1203 transitions. [2021-02-19 18:27:04,127 INFO L78 Accepts]: Start accepts. Automaton has 595 states and 1203 transitions. Word has length 33 [2021-02-19 18:27:04,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:04,127 INFO L480 AbstractCegarLoop]: Abstraction has 595 states and 1203 transitions. [2021-02-19 18:27:04,127 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:04,127 INFO L276 IsEmpty]: Start isEmpty. Operand 595 states and 1203 transitions. [2021-02-19 18:27:04,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:04,127 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:04,128 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:04,328 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-02-19 18:27:04,328 INFO L428 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:04,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:04,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1847042898, now seen corresponding path program 71 times [2021-02-19 18:27:04,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:04,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878398377] [2021-02-19 18:27:04,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:04,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:04,640 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:04,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878398377] [2021-02-19 18:27:04,641 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1995566323] [2021-02-19 18:27:04,641 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 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 [2021-02-19 18:27:04,660 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:27:04,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:04,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:04,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:05,002 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:05,003 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:05,004 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:05,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:05,006 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:05,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:05,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:05,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:05,159 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:05,159 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:05,159 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:05,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446476419] [2021-02-19 18:27:05,160 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:05,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:05,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:05,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:05,160 INFO L87 Difference]: Start difference. First operand 595 states and 1203 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:06,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:06,634 INFO L93 Difference]: Finished difference Result 781 states and 1543 transitions. [2021-02-19 18:27:06,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-02-19 18:27:06,635 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:06,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:06,636 INFO L225 Difference]: With dead ends: 781 [2021-02-19 18:27:06,637 INFO L226 Difference]: Without dead ends: 685 [2021-02-19 18:27:06,637 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=272, Invalid=2808, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:27:06,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 685 states. [2021-02-19 18:27:06,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 685 to 606. [2021-02-19 18:27:06,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 606 states, 605 states have (on average 2.031404958677686) internal successors, (1229), 605 states have internal predecessors, (1229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:06,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 606 states to 606 states and 1229 transitions. [2021-02-19 18:27:06,646 INFO L78 Accepts]: Start accepts. Automaton has 606 states and 1229 transitions. Word has length 33 [2021-02-19 18:27:06,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:06,646 INFO L480 AbstractCegarLoop]: Abstraction has 606 states and 1229 transitions. [2021-02-19 18:27:06,646 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:06,646 INFO L276 IsEmpty]: Start isEmpty. Operand 606 states and 1229 transitions. [2021-02-19 18:27:06,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:06,647 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:06,647 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:06,868 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:06,869 INFO L428 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:06,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:06,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1062301808, now seen corresponding path program 72 times [2021-02-19 18:27:06,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:06,869 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774746042] [2021-02-19 18:27:06,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:06,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:07,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774746042] [2021-02-19 18:27:07,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1469032636] [2021-02-19 18:27:07,197 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 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 [2021-02-19 18:27:07,218 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:27:07,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:07,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:27:07,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:07,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:07,558 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:07,558 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:07,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:07,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:07,572 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:07,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:07,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:07,706 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:07,706 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:07,706 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:07,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154028791] [2021-02-19 18:27:07,706 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:07,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:07,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:07,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:07,707 INFO L87 Difference]: Start difference. First operand 606 states and 1229 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:09,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:09,957 INFO L93 Difference]: Finished difference Result 862 states and 1713 transitions. [2021-02-19 18:27:09,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-02-19 18:27:09,958 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:09,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:09,959 INFO L225 Difference]: With dead ends: 862 [2021-02-19 18:27:09,959 INFO L226 Difference]: Without dead ends: 760 [2021-02-19 18:27:09,959 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=409, Invalid=4013, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:27:09,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2021-02-19 18:27:09,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 622. [2021-02-19 18:27:09,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 622 states, 621 states have (on average 2.028985507246377) internal successors, (1260), 621 states have internal predecessors, (1260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:09,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 622 states to 622 states and 1260 transitions. [2021-02-19 18:27:09,965 INFO L78 Accepts]: Start accepts. Automaton has 622 states and 1260 transitions. Word has length 33 [2021-02-19 18:27:09,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:09,965 INFO L480 AbstractCegarLoop]: Abstraction has 622 states and 1260 transitions. [2021-02-19 18:27:09,965 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:09,965 INFO L276 IsEmpty]: Start isEmpty. Operand 622 states and 1260 transitions. [2021-02-19 18:27:09,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:09,966 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:09,966 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:10,166 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-02-19 18:27:10,166 INFO L428 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:10,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:10,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1703412398, now seen corresponding path program 73 times [2021-02-19 18:27:10,167 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:10,167 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [862023409] [2021-02-19 18:27:10,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:10,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:10,481 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:10,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [862023409] [2021-02-19 18:27:10,482 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416191436] [2021-02-19 18:27:10,482 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 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 [2021-02-19 18:27:10,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:10,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:10,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:10,795 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:10,796 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:10,796 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:10,797 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:10,798 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:10,806 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:10,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:10,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:10,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:10,967 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:10,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95999985] [2021-02-19 18:27:10,968 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:10,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:10,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:10,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=831, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:10,968 INFO L87 Difference]: Start difference. First operand 622 states and 1260 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:13,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:13,943 INFO L93 Difference]: Finished difference Result 971 states and 1938 transitions. [2021-02-19 18:27:13,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-02-19 18:27:13,944 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:13,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:13,945 INFO L225 Difference]: With dead ends: 971 [2021-02-19 18:27:13,945 INFO L226 Difference]: Without dead ends: 884 [2021-02-19 18:27:13,945 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2077 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=669, Invalid=6137, Unknown=0, NotChecked=0, Total=6806 [2021-02-19 18:27:13,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 884 states. [2021-02-19 18:27:13,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 884 to 643. [2021-02-19 18:27:13,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.0373831775700935) internal successors, (1308), 642 states have internal predecessors, (1308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:13,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1308 transitions. [2021-02-19 18:27:13,952 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1308 transitions. Word has length 33 [2021-02-19 18:27:13,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:13,953 INFO L480 AbstractCegarLoop]: Abstraction has 643 states and 1308 transitions. [2021-02-19 18:27:13,953 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:13,953 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1308 transitions. [2021-02-19 18:27:13,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:13,954 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:13,954 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:14,154 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:14,154 INFO L428 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:14,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:14,155 INFO L82 PathProgramCache]: Analyzing trace with hash -277170032, now seen corresponding path program 74 times [2021-02-19 18:27:14,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:14,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962190212] [2021-02-19 18:27:14,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:14,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:14,548 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962190212] [2021-02-19 18:27:14,549 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534119983] [2021-02-19 18:27:14,549 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 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 [2021-02-19 18:27:14,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:27:14,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:14,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:14,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:14,884 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:14,886 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:14,886 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:14,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:14,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:14,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:14,907 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:14,907 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:15,067 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:15,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:15,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:15,068 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941043868] [2021-02-19 18:27:15,068 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:15,068 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:15,068 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:15,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=832, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:15,068 INFO L87 Difference]: Start difference. First operand 643 states and 1308 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:18,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:18,659 INFO L93 Difference]: Finished difference Result 1084 states and 2162 transitions. [2021-02-19 18:27:18,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-02-19 18:27:18,660 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:18,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:18,661 INFO L225 Difference]: With dead ends: 1084 [2021-02-19 18:27:18,661 INFO L226 Difference]: Without dead ends: 1005 [2021-02-19 18:27:18,662 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2984 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=852, Invalid=8460, Unknown=0, NotChecked=0, Total=9312 [2021-02-19 18:27:18,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1005 states. [2021-02-19 18:27:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1005 to 648. [2021-02-19 18:27:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 647 states have (on average 2.034003091190108) internal successors, (1316), 647 states have internal predecessors, (1316), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 1316 transitions. [2021-02-19 18:27:18,669 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 1316 transitions. Word has length 33 [2021-02-19 18:27:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:18,669 INFO L480 AbstractCegarLoop]: Abstraction has 648 states and 1316 transitions. [2021-02-19 18:27:18,670 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 1316 transitions. [2021-02-19 18:27:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:18,670 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:18,670 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:18,871 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:18,871 INFO L428 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:18,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:18,871 INFO L82 PathProgramCache]: Analyzing trace with hash -1191802778, now seen corresponding path program 75 times [2021-02-19 18:27:18,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:18,871 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197964356] [2021-02-19 18:27:18,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:18,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:19,287 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:19,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197964356] [2021-02-19 18:27:19,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [194500843] [2021-02-19 18:27:19,288 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 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 [2021-02-19 18:27:19,317 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:27:19,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:19,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:19,577 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:19,578 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:19,578 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:19,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:19,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:19,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:19,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:19,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:27:19,807 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:19,808 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:19,808 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:19,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126491625] [2021-02-19 18:27:19,808 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:19,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:19,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:19,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=839, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:19,808 INFO L87 Difference]: Start difference. First operand 648 states and 1316 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:21,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:21,812 INFO L93 Difference]: Finished difference Result 858 states and 1713 transitions. [2021-02-19 18:27:21,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:27:21,813 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:21,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:21,814 INFO L225 Difference]: With dead ends: 858 [2021-02-19 18:27:21,814 INFO L226 Difference]: Without dead ends: 799 [2021-02-19 18:27:21,814 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=404, Invalid=3886, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:27:21,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 799 states. [2021-02-19 18:27:21,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 799 to 661. [2021-02-19 18:27:21,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 661 states, 660 states have (on average 2.0393939393939395) internal successors, (1346), 660 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:21,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 661 states to 661 states and 1346 transitions. [2021-02-19 18:27:21,821 INFO L78 Accepts]: Start accepts. Automaton has 661 states and 1346 transitions. Word has length 33 [2021-02-19 18:27:21,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:21,821 INFO L480 AbstractCegarLoop]: Abstraction has 661 states and 1346 transitions. [2021-02-19 18:27:21,821 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:21,821 INFO L276 IsEmpty]: Start isEmpty. Operand 661 states and 1346 transitions. [2021-02-19 18:27:21,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:21,822 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:21,822 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:22,023 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:22,023 INFO L428 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:22,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:22,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1188386500, now seen corresponding path program 76 times [2021-02-19 18:27:22,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:22,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336827883] [2021-02-19 18:27:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:22,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:22,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:22,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336827883] [2021-02-19 18:27:22,363 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144733840] [2021-02-19 18:27:22,363 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 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 [2021-02-19 18:27:22,381 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:27:22,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:22,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:22,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:22,722 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:22,723 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:22,724 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:22,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:22,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:22,734 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:22,735 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:22,735 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:22,872 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:22,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:22,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:22,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132804380] [2021-02-19 18:27:22,873 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:22,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:22,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:22,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:22,874 INFO L87 Difference]: Start difference. First operand 661 states and 1346 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:25,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:25,777 INFO L93 Difference]: Finished difference Result 923 states and 1836 transitions. [2021-02-19 18:27:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:27:25,778 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:25,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:25,779 INFO L225 Difference]: With dead ends: 923 [2021-02-19 18:27:25,779 INFO L226 Difference]: Without dead ends: 835 [2021-02-19 18:27:25,780 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1713 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=495, Invalid=5357, Unknown=0, NotChecked=0, Total=5852 [2021-02-19 18:27:25,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 835 states. [2021-02-19 18:27:25,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 835 to 716. [2021-02-19 18:27:25,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 716 states, 715 states have (on average 2.0377622377622377) internal successors, (1457), 715 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:25,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 716 states to 716 states and 1457 transitions. [2021-02-19 18:27:25,787 INFO L78 Accepts]: Start accepts. Automaton has 716 states and 1457 transitions. Word has length 33 [2021-02-19 18:27:25,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:25,787 INFO L480 AbstractCegarLoop]: Abstraction has 716 states and 1457 transitions. [2021-02-19 18:27:25,787 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:25,787 INFO L276 IsEmpty]: Start isEmpty. Operand 716 states and 1457 transitions. [2021-02-19 18:27:25,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:25,788 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:25,788 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:25,989 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:25,989 INFO L428 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:25,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:25,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1829497090, now seen corresponding path program 77 times [2021-02-19 18:27:25,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:25,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285952824] [2021-02-19 18:27:25,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:25,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:26,361 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:26,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285952824] [2021-02-19 18:27:26,361 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1307516269] [2021-02-19 18:27:26,361 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 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 [2021-02-19 18:27:26,381 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:27:26,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:26,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:26,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:26,693 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:26,695 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:26,695 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:26,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:26,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:26,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:26,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:26,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:26,918 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:26,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:26,918 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:26,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418418023] [2021-02-19 18:27:26,919 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:26,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:26,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:26,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:26,919 INFO L87 Difference]: Start difference. First operand 716 states and 1457 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:29,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:29,783 INFO L93 Difference]: Finished difference Result 1025 states and 2053 transitions. [2021-02-19 18:27:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 18:27:29,784 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:29,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:29,785 INFO L225 Difference]: With dead ends: 1025 [2021-02-19 18:27:29,785 INFO L226 Difference]: Without dead ends: 945 [2021-02-19 18:27:29,785 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2216 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=619, Invalid=6521, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 18:27:29,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 945 states. [2021-02-19 18:27:29,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 945 to 735. [2021-02-19 18:27:29,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 735 states, 734 states have (on average 2.0395095367847413) internal successors, (1497), 734 states have internal predecessors, (1497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:29,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 735 states to 735 states and 1497 transitions. [2021-02-19 18:27:29,797 INFO L78 Accepts]: Start accepts. Automaton has 735 states and 1497 transitions. Word has length 33 [2021-02-19 18:27:29,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:29,797 INFO L480 AbstractCegarLoop]: Abstraction has 735 states and 1497 transitions. [2021-02-19 18:27:29,797 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:29,798 INFO L276 IsEmpty]: Start isEmpty. Operand 735 states and 1497 transitions. [2021-02-19 18:27:29,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:29,799 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:29,799 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:30,014 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:30,015 INFO L428 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:30,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:30,015 INFO L82 PathProgramCache]: Analyzing trace with hash -403254724, now seen corresponding path program 78 times [2021-02-19 18:27:30,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:30,015 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903751423] [2021-02-19 18:27:30,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:30,362 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:30,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903751423] [2021-02-19 18:27:30,362 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [401719908] [2021-02-19 18:27:30,362 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 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 [2021-02-19 18:27:30,383 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:27:30,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:30,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:30,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:30,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:30,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:30,673 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:30,674 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:30,683 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:30,684 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:30,685 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:30,849 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:30,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:30,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144368977] [2021-02-19 18:27:30,850 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:30,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:30,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:30,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=837, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:30,850 INFO L87 Difference]: Start difference. First operand 735 states and 1497 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:34,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:34,663 INFO L93 Difference]: Finished difference Result 999 states and 2002 transitions. [2021-02-19 18:27:34,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 18:27:34,664 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:34,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:34,665 INFO L225 Difference]: With dead ends: 999 [2021-02-19 18:27:34,665 INFO L226 Difference]: Without dead ends: 943 [2021-02-19 18:27:34,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2517 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=706, Invalid=7304, Unknown=0, NotChecked=0, Total=8010 [2021-02-19 18:27:34,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 943 states. [2021-02-19 18:27:34,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 943 to 734. [2021-02-19 18:27:34,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 734 states, 733 states have (on average 2.03956343792633) internal successors, (1495), 733 states have internal predecessors, (1495), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:34,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 734 states to 734 states and 1495 transitions. [2021-02-19 18:27:34,676 INFO L78 Accepts]: Start accepts. Automaton has 734 states and 1495 transitions. Word has length 33 [2021-02-19 18:27:34,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:34,676 INFO L480 AbstractCegarLoop]: Abstraction has 734 states and 1495 transitions. [2021-02-19 18:27:34,676 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:34,676 INFO L276 IsEmpty]: Start isEmpty. Operand 734 states and 1495 transitions. [2021-02-19 18:27:34,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:34,677 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:34,678 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:34,900 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:34,900 INFO L428 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:34,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:34,901 INFO L82 PathProgramCache]: Analyzing trace with hash -508101342, now seen corresponding path program 79 times [2021-02-19 18:27:34,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:34,901 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335120378] [2021-02-19 18:27:34,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:34,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:35,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:35,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335120378] [2021-02-19 18:27:35,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2020781845] [2021-02-19 18:27:35,255 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 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 [2021-02-19 18:27:35,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:35,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:35,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:35,533 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:35,534 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:35,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:35,536 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:35,546 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:35,547 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:35,547 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:27:35,759 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:35,760 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:35,760 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945268185] [2021-02-19 18:27:35,760 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:35,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:35,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:35,761 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=838, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:35,761 INFO L87 Difference]: Start difference. First operand 734 states and 1495 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:38,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:38,125 INFO L93 Difference]: Finished difference Result 987 states and 1977 transitions. [2021-02-19 18:27:38,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-02-19 18:27:38,126 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:38,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:38,127 INFO L225 Difference]: With dead ends: 987 [2021-02-19 18:27:38,127 INFO L226 Difference]: Without dead ends: 931 [2021-02-19 18:27:38,128 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1176 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=428, Invalid=3994, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:27:38,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-02-19 18:27:38,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 817. [2021-02-19 18:27:38,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 817 states, 816 states have (on average 2.0379901960784315) internal successors, (1663), 816 states have internal predecessors, (1663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:38,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 817 states to 817 states and 1663 transitions. [2021-02-19 18:27:38,141 INFO L78 Accepts]: Start accepts. Automaton has 817 states and 1663 transitions. Word has length 33 [2021-02-19 18:27:38,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:38,141 INFO L480 AbstractCegarLoop]: Abstraction has 817 states and 1663 transitions. [2021-02-19 18:27:38,141 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:38,141 INFO L276 IsEmpty]: Start isEmpty. Operand 817 states and 1663 transitions. [2021-02-19 18:27:38,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:38,142 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:38,142 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:38,342 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:38,343 INFO L428 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:38,343 INFO L82 PathProgramCache]: Analyzing trace with hash 850227176, now seen corresponding path program 80 times [2021-02-19 18:27:38,343 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:38,343 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975552099] [2021-02-19 18:27:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:38,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:38,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:38,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975552099] [2021-02-19 18:27:38,686 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917713138] [2021-02-19 18:27:38,686 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 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 [2021-02-19 18:27:38,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:27:38,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:38,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:38,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:39,077 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:39,079 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:39,079 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:39,080 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:39,081 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:39,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:39,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:39,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:39,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:39,230 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:39,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007180910] [2021-02-19 18:27:39,230 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:39,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:39,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:39,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:39,231 INFO L87 Difference]: Start difference. First operand 817 states and 1663 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:40,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:40,700 INFO L93 Difference]: Finished difference Result 1026 states and 2044 transitions. [2021-02-19 18:27:40,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:27:40,701 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:40,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:40,702 INFO L225 Difference]: With dead ends: 1026 [2021-02-19 18:27:40,702 INFO L226 Difference]: Without dead ends: 930 [2021-02-19 18:27:40,703 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 859 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=275, Invalid=2805, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:27:40,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 930 states. [2021-02-19 18:27:40,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 930 to 842. [2021-02-19 18:27:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 842 states, 841 states have (on average 2.036860879904875) internal successors, (1713), 841 states have internal predecessors, (1713), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 842 states to 842 states and 1713 transitions. [2021-02-19 18:27:40,712 INFO L78 Accepts]: Start accepts. Automaton has 842 states and 1713 transitions. Word has length 33 [2021-02-19 18:27:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:40,712 INFO L480 AbstractCegarLoop]: Abstraction has 842 states and 1713 transitions. [2021-02-19 18:27:40,712 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 842 states and 1713 transitions. [2021-02-19 18:27:40,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:40,713 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:40,713 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:40,914 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-02-19 18:27:40,914 INFO L428 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:40,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:40,914 INFO L82 PathProgramCache]: Analyzing trace with hash -2059117530, now seen corresponding path program 81 times [2021-02-19 18:27:40,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:40,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503167599] [2021-02-19 18:27:40,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:40,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:41,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503167599] [2021-02-19 18:27:41,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978884323] [2021-02-19 18:27:41,267 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 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 [2021-02-19 18:27:41,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:27:41,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:41,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:41,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:41,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:41,674 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:41,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:41,675 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:41,685 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:41,686 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:41,686 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:41,827 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:41,827 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:41,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407583981] [2021-02-19 18:27:41,827 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:41,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:41,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:41,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=835, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:41,828 INFO L87 Difference]: Start difference. First operand 842 states and 1713 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:43,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:43,325 INFO L93 Difference]: Finished difference Result 1041 states and 2080 transitions. [2021-02-19 18:27:43,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:27:43,326 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:43,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:43,327 INFO L225 Difference]: With dead ends: 1041 [2021-02-19 18:27:43,327 INFO L226 Difference]: Without dead ends: 953 [2021-02-19 18:27:43,327 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 853 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=279, Invalid=2801, Unknown=0, NotChecked=0, Total=3080 [2021-02-19 18:27:43,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 953 states. [2021-02-19 18:27:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 953 to 845. [2021-02-19 18:27:43,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 845 states, 844 states have (on average 2.036729857819905) internal successors, (1719), 844 states have internal predecessors, (1719), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:43,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 845 states to 845 states and 1719 transitions. [2021-02-19 18:27:43,336 INFO L78 Accepts]: Start accepts. Automaton has 845 states and 1719 transitions. Word has length 33 [2021-02-19 18:27:43,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:43,336 INFO L480 AbstractCegarLoop]: Abstraction has 845 states and 1719 transitions. [2021-02-19 18:27:43,336 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:43,336 INFO L276 IsEmpty]: Start isEmpty. Operand 845 states and 1719 transitions. [2021-02-19 18:27:43,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:43,338 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:43,338 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:43,538 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:43,540 INFO L428 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1594739176, now seen corresponding path program 82 times [2021-02-19 18:27:43,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:43,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359960339] [2021-02-19 18:27:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:43,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:43,889 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:43,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359960339] [2021-02-19 18:27:43,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150844377] [2021-02-19 18:27:43,889 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 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 [2021-02-19 18:27:43,910 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:27:43,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:43,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:43,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:44,232 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:44,232 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:44,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:44,235 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:44,244 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:44,245 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:44,245 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:44,408 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:44,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:44,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:44,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619773410] [2021-02-19 18:27:44,409 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:44,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:44,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:44,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:44,409 INFO L87 Difference]: Start difference. First operand 845 states and 1719 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:46,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:46,691 INFO L93 Difference]: Finished difference Result 1128 states and 2259 transitions. [2021-02-19 18:27:46,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:27:46,692 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:46,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:46,693 INFO L225 Difference]: With dead ends: 1128 [2021-02-19 18:27:46,693 INFO L226 Difference]: Without dead ends: 1032 [2021-02-19 18:27:46,694 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1485 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=481, Invalid=4489, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:27:46,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2021-02-19 18:27:46,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 850. [2021-02-19 18:27:46,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 850 states, 849 states have (on average 2.035335689045936) internal successors, (1728), 849 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:46,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 850 states to 850 states and 1728 transitions. [2021-02-19 18:27:46,705 INFO L78 Accepts]: Start accepts. Automaton has 850 states and 1728 transitions. Word has length 33 [2021-02-19 18:27:46,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:46,706 INFO L480 AbstractCegarLoop]: Abstraction has 850 states and 1728 transitions. [2021-02-19 18:27:46,706 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:46,706 INFO L276 IsEmpty]: Start isEmpty. Operand 850 states and 1728 transitions. [2021-02-19 18:27:46,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:46,707 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:46,707 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:46,920 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-02-19 18:27:46,921 INFO L428 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:46,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:46,921 INFO L82 PathProgramCache]: Analyzing trace with hash -1273985754, now seen corresponding path program 83 times [2021-02-19 18:27:46,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:46,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21505093] [2021-02-19 18:27:46,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:46,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:47,259 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:47,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21505093] [2021-02-19 18:27:47,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226718203] [2021-02-19 18:27:47,260 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 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 [2021-02-19 18:27:47,282 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:27:47,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:47,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:47,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:47,579 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:47,580 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:47,581 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:47,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:47,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:47,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:47,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:47,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:47,756 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:47,757 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:47,757 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:47,757 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662450040] [2021-02-19 18:27:47,757 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:47,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:47,758 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:47,758 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:47,758 INFO L87 Difference]: Start difference. First operand 850 states and 1728 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:50,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:50,621 INFO L93 Difference]: Finished difference Result 1294 states and 2586 transitions. [2021-02-19 18:27:50,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 18:27:50,621 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:50,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:50,623 INFO L225 Difference]: With dead ends: 1294 [2021-02-19 18:27:50,624 INFO L226 Difference]: Without dead ends: 1216 [2021-02-19 18:27:50,624 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2195 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=666, Invalid=6306, Unknown=0, NotChecked=0, Total=6972 [2021-02-19 18:27:50,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1216 states. [2021-02-19 18:27:50,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1216 to 841. [2021-02-19 18:27:50,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 841 states, 840 states have (on average 2.033333333333333) internal successors, (1708), 840 states have internal predecessors, (1708), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:50,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 841 states to 841 states and 1708 transitions. [2021-02-19 18:27:50,636 INFO L78 Accepts]: Start accepts. Automaton has 841 states and 1708 transitions. Word has length 33 [2021-02-19 18:27:50,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:50,636 INFO L480 AbstractCegarLoop]: Abstraction has 841 states and 1708 transitions. [2021-02-19 18:27:50,636 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:50,636 INFO L276 IsEmpty]: Start isEmpty. Operand 841 states and 1708 transitions. [2021-02-19 18:27:50,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:50,637 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:50,637 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:50,838 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:50,838 INFO L428 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:50,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:50,838 INFO L82 PathProgramCache]: Analyzing trace with hash 2106348796, now seen corresponding path program 84 times [2021-02-19 18:27:50,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:50,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574316383] [2021-02-19 18:27:50,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:50,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:51,200 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:51,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574316383] [2021-02-19 18:27:51,200 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089085310] [2021-02-19 18:27:51,200 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:27:51,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:27:51,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:51,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:27:51,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:51,484 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:51,485 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:51,486 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:51,486 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:51,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:51,498 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:51,499 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:51,499 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:46, output treesize:16 [2021-02-19 18:27:51,729 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:51,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:51,730 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 30 [2021-02-19 18:27:51,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156631952] [2021-02-19 18:27:51,730 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:27:51,730 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:51,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:27:51,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=836, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:27:51,731 INFO L87 Difference]: Start difference. First operand 841 states and 1708 transitions. Second operand has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:53,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:53,987 INFO L93 Difference]: Finished difference Result 1058 states and 2111 transitions. [2021-02-19 18:27:53,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:27:53,987 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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 33 [2021-02-19 18:27:53,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:53,989 INFO L225 Difference]: With dead ends: 1058 [2021-02-19 18:27:53,989 INFO L226 Difference]: Without dead ends: 996 [2021-02-19 18:27:53,989 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1463 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=487, Invalid=4625, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 18:27:53,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 996 states. [2021-02-19 18:27:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 996 to 862. [2021-02-19 18:27:53,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 2.032520325203252) internal successors, (1750), 861 states have internal predecessors, (1750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:53,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1750 transitions. [2021-02-19 18:27:53,998 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1750 transitions. Word has length 33 [2021-02-19 18:27:53,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:53,998 INFO L480 AbstractCegarLoop]: Abstraction has 862 states and 1750 transitions. [2021-02-19 18:27:53,998 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.903225806451613) internal successors, (59), 30 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) [2021-02-19 18:27:53,998 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1750 transitions. [2021-02-19 18:27:53,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:53,999 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:53,999 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:54,200 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:54,200 INFO L428 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:54,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:54,200 INFO L82 PathProgramCache]: Analyzing trace with hash -1692439838, now seen corresponding path program 85 times [2021-02-19 18:27:54,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:54,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754130602] [2021-02-19 18:27:54,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:54,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:54,531 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:54,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754130602] [2021-02-19 18:27:54,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773379961] [2021-02-19 18:27:54,531 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:27:54,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:54,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:54,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:54,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:54,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:54,924 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:54,924 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:54,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:54,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:54,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:54,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:55,085 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:55,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:55,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-02-19 18:27:55,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319981006] [2021-02-19 18:27:55,085 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:27:55,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:55,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:27:55,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=783, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:27:55,086 INFO L87 Difference]: Start difference. First operand 862 states and 1750 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 18:27:57,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:27:57,054 INFO L93 Difference]: Finished difference Result 1056 states and 2102 transitions. [2021-02-19 18:27:57,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:27:57,055 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 33 [2021-02-19 18:27:57,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:27:57,056 INFO L225 Difference]: With dead ends: 1056 [2021-02-19 18:27:57,056 INFO L226 Difference]: Without dead ends: 968 [2021-02-19 18:27:57,056 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 916 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=314, Invalid=3108, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:27:57,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2021-02-19 18:27:57,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 884. [2021-02-19 18:27:57,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.029445073612684) internal successors, (1792), 883 states have internal predecessors, (1792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:27:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 1792 transitions. [2021-02-19 18:27:57,068 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 1792 transitions. Word has length 33 [2021-02-19 18:27:57,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:27:57,069 INFO L480 AbstractCegarLoop]: Abstraction has 884 states and 1792 transitions. [2021-02-19 18:27:57,069 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 18:27:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 1792 transitions. [2021-02-19 18:27:57,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:27:57,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:27:57,070 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:27:57,292 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:27:57,292 INFO L428 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:27:57,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:27:57,293 INFO L82 PathProgramCache]: Analyzing trace with hash 1961416868, now seen corresponding path program 86 times [2021-02-19 18:27:57,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:27:57,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041919353] [2021-02-19 18:27:57,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:27:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:27:57,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041919353] [2021-02-19 18:27:57,654 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778106322] [2021-02-19 18:27:57,654 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 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 [2021-02-19 18:27:57,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:27:57,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:27:57,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:27:57,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:27:57,970 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:57,971 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:27:57,972 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:27:57,972 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:27:57,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:27:57,983 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:27:57,984 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:27:57,984 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:27:58,151 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:27:58,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:27:58,152 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-02-19 18:27:58,152 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335136772] [2021-02-19 18:27:58,152 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:27:58,152 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:27:58,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:27:58,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=778, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:27:58,153 INFO L87 Difference]: Start difference. First operand 884 states and 1792 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 18:28:00,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:00,271 INFO L93 Difference]: Finished difference Result 1078 states and 2150 transitions. [2021-02-19 18:28:00,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:28:00,271 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 33 [2021-02-19 18:28:00,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:00,287 INFO L225 Difference]: With dead ends: 1078 [2021-02-19 18:28:00,287 INFO L226 Difference]: Without dead ends: 1006 [2021-02-19 18:28:00,288 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=408, Invalid=3752, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:28:00,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1006 states. [2021-02-19 18:28:00,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1006 to 885. [2021-02-19 18:28:00,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 885 states, 884 states have (on average 2.0294117647058822) internal successors, (1794), 884 states have internal predecessors, (1794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 885 states to 885 states and 1794 transitions. [2021-02-19 18:28:00,300 INFO L78 Accepts]: Start accepts. Automaton has 885 states and 1794 transitions. Word has length 33 [2021-02-19 18:28:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:00,300 INFO L480 AbstractCegarLoop]: Abstraction has 885 states and 1794 transitions. [2021-02-19 18:28:00,300 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 18:28:00,300 INFO L276 IsEmpty]: Start isEmpty. Operand 885 states and 1794 transitions. [2021-02-19 18:28:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:00,302 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:00,302 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:00,517 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:00,518 INFO L428 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:00,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:00,518 INFO L82 PathProgramCache]: Analyzing trace with hash -907308062, now seen corresponding path program 87 times [2021-02-19 18:28:00,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:00,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85204483] [2021-02-19 18:28:00,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:00,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:00,855 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:00,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85204483] [2021-02-19 18:28:00,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829797168] [2021-02-19 18:28:00,856 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 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 [2021-02-19 18:28:00,882 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:28:00,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:00,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:00,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:01,212 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:28:01,214 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:28:01,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:28:01,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:01,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:01,233 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:01,233 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:28:01,448 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:01,449 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:01,449 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-02-19 18:28:01,449 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612493077] [2021-02-19 18:28:01,449 INFO L460 AbstractCegarLoop]: Interpolant automaton has 30 states [2021-02-19 18:28:01,449 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:01,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-02-19 18:28:01,450 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=777, Unknown=0, NotChecked=0, Total=870 [2021-02-19 18:28:01,450 INFO L87 Difference]: Start difference. First operand 885 states and 1794 transitions. Second operand has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 18:28:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:04,181 INFO L93 Difference]: Finished difference Result 1116 states and 2231 transitions. [2021-02-19 18:28:04,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:28:04,182 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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 33 [2021-02-19 18:28:04,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:04,183 INFO L225 Difference]: With dead ends: 1116 [2021-02-19 18:28:04,183 INFO L226 Difference]: Without dead ends: 1054 [2021-02-19 18:28:04,183 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 4 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1516 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=520, Invalid=4592, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 18:28:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1054 states. [2021-02-19 18:28:04,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1054 to 875. [2021-02-19 18:28:04,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 875 states, 874 states have (on average 2.028604118993135) internal successors, (1773), 874 states have internal predecessors, (1773), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:04,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 875 states to 875 states and 1773 transitions. [2021-02-19 18:28:04,192 INFO L78 Accepts]: Start accepts. Automaton has 875 states and 1773 transitions. Word has length 33 [2021-02-19 18:28:04,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:04,192 INFO L480 AbstractCegarLoop]: Abstraction has 875 states and 1773 transitions. [2021-02-19 18:28:04,193 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 30 states, 30 states have (on average 1.9666666666666666) internal successors, (59), 29 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) [2021-02-19 18:28:04,193 INFO L276 IsEmpty]: Start isEmpty. Operand 875 states and 1773 transitions. [2021-02-19 18:28:04,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:04,194 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:04,194 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:04,394 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:04,394 INFO L428 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:04,395 INFO L82 PathProgramCache]: Analyzing trace with hash 609855962, now seen corresponding path program 88 times [2021-02-19 18:28:04,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:04,395 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451696419] [2021-02-19 18:28:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:04,724 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:04,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451696419] [2021-02-19 18:28:04,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494225918] [2021-02-19 18:28:04,725 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 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 [2021-02-19 18:28:04,745 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:28:04,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:04,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:04,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:05,070 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:05,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:05,074 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:05,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:05,081 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:05,081 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:28:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:05,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:05,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:05,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591222665] [2021-02-19 18:28:05,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:05,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:05,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:05,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:05,233 INFO L87 Difference]: Start difference. First operand 875 states and 1773 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:06,397 INFO L93 Difference]: Finished difference Result 1029 states and 2048 transitions. [2021-02-19 18:28:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:28:06,398 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:06,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:06,399 INFO L225 Difference]: With dead ends: 1029 [2021-02-19 18:28:06,399 INFO L226 Difference]: Without dead ends: 981 [2021-02-19 18:28:06,399 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:28:06,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 981 states. [2021-02-19 18:28:06,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 981 to 896. [2021-02-19 18:28:06,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 895 states have (on average 2.029050279329609) internal successors, (1816), 895 states have internal predecessors, (1816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:06,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 1816 transitions. [2021-02-19 18:28:06,408 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 1816 transitions. Word has length 33 [2021-02-19 18:28:06,408 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:06,408 INFO L480 AbstractCegarLoop]: Abstraction has 896 states and 1816 transitions. [2021-02-19 18:28:06,408 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:06,408 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 1816 transitions. [2021-02-19 18:28:06,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:06,410 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:06,410 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:06,610 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:06,610 INFO L428 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:06,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:06,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1889227676, now seen corresponding path program 89 times [2021-02-19 18:28:06,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:06,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254152682] [2021-02-19 18:28:06,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:06,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:06,913 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254152682] [2021-02-19 18:28:06,914 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913113661] [2021-02-19 18:28:06,914 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 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 [2021-02-19 18:28:06,933 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:28:06,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:06,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:28:06,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:07,267 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:28:07,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:28:07,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:07,275 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:07,276 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:07,276 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:28:07,424 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:07,424 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:07,424 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:07,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964315362] [2021-02-19 18:28:07,424 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:07,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:07,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:07,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:07,425 INFO L87 Difference]: Start difference. First operand 896 states and 1816 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:08,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:08,648 INFO L93 Difference]: Finished difference Result 1066 states and 2115 transitions. [2021-02-19 18:28:08,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:28:08,649 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:08,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:08,650 INFO L225 Difference]: With dead ends: 1066 [2021-02-19 18:28:08,650 INFO L226 Difference]: Without dead ends: 1018 [2021-02-19 18:28:08,651 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:28:08,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1018 states. [2021-02-19 18:28:08,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1018 to 897. [2021-02-19 18:28:08,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 2.029017857142857) internal successors, (1818), 896 states have internal predecessors, (1818), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:08,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 1818 transitions. [2021-02-19 18:28:08,660 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 1818 transitions. Word has length 33 [2021-02-19 18:28:08,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:08,660 INFO L480 AbstractCegarLoop]: Abstraction has 897 states and 1818 transitions. [2021-02-19 18:28:08,660 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:08,660 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 1818 transitions. [2021-02-19 18:28:08,661 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:08,661 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:08,661 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:08,861 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-02-19 18:28:08,861 INFO L428 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:08,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:08,862 INFO L82 PathProgramCache]: Analyzing trace with hash -1020117030, now seen corresponding path program 90 times [2021-02-19 18:28:08,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:08,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701542213] [2021-02-19 18:28:08,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:08,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701542213] [2021-02-19 18:28:09,257 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [237096473] [2021-02-19 18:28:09,257 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 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 [2021-02-19 18:28:09,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:28:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:09,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:28:09,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:09,659 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:28:09,659 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:28:09,660 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:09,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:09,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:09,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:28:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:09,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:09,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:09,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881026008] [2021-02-19 18:28:09,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:09,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:09,820 INFO L87 Difference]: Start difference. First operand 897 states and 1818 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:11,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:11,278 INFO L93 Difference]: Finished difference Result 1104 states and 2193 transitions. [2021-02-19 18:28:11,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:28:11,279 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:11,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:11,281 INFO L225 Difference]: With dead ends: 1104 [2021-02-19 18:28:11,281 INFO L226 Difference]: Without dead ends: 1056 [2021-02-19 18:28:11,281 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:28:11,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2021-02-19 18:28:11,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 901. [2021-02-19 18:28:11,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 901 states, 900 states have (on average 2.028888888888889) internal successors, (1826), 900 states have internal predecessors, (1826), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:11,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 901 states to 901 states and 1826 transitions. [2021-02-19 18:28:11,289 INFO L78 Accepts]: Start accepts. Automaton has 901 states and 1826 transitions. Word has length 33 [2021-02-19 18:28:11,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:11,289 INFO L480 AbstractCegarLoop]: Abstraction has 901 states and 1826 transitions. [2021-02-19 18:28:11,289 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:11,289 INFO L276 IsEmpty]: Start isEmpty. Operand 901 states and 1826 transitions. [2021-02-19 18:28:11,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:11,291 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:11,291 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:11,491 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:11,491 INFO L428 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:11,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:11,491 INFO L82 PathProgramCache]: Analyzing trace with hash -1661227620, now seen corresponding path program 91 times [2021-02-19 18:28:11,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:11,492 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [676620143] [2021-02-19 18:28:11,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:11,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:11,881 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:11,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [676620143] [2021-02-19 18:28:11,881 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862668858] [2021-02-19 18:28:11,881 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 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 [2021-02-19 18:28:11,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:11,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:11,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:12,287 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:28:12,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:28:12,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:12,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:12,299 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:12,299 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:28:12,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:12,519 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:12,519 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:12,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300293700] [2021-02-19 18:28:12,519 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:12,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:12,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:12,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:12,520 INFO L87 Difference]: Start difference. First operand 901 states and 1826 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:14,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:14,070 INFO L93 Difference]: Finished difference Result 1137 states and 2262 transitions. [2021-02-19 18:28:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:28:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:14,072 INFO L225 Difference]: With dead ends: 1137 [2021-02-19 18:28:14,072 INFO L226 Difference]: Without dead ends: 1105 [2021-02-19 18:28:14,072 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 699 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=250, Invalid=2506, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:28:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-02-19 18:28:14,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 902. [2021-02-19 18:28:14,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 902 states, 901 states have (on average 2.0288568257491675) internal successors, (1828), 901 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:14,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 902 states to 902 states and 1828 transitions. [2021-02-19 18:28:14,082 INFO L78 Accepts]: Start accepts. Automaton has 902 states and 1828 transitions. Word has length 33 [2021-02-19 18:28:14,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:14,082 INFO L480 AbstractCegarLoop]: Abstraction has 902 states and 1828 transitions. [2021-02-19 18:28:14,082 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:14,082 INFO L276 IsEmpty]: Start isEmpty. Operand 902 states and 1828 transitions. [2021-02-19 18:28:14,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:14,084 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:14,084 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:14,290 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-02-19 18:28:14,290 INFO L428 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:14,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:14,290 INFO L82 PathProgramCache]: Analyzing trace with hash -234985254, now seen corresponding path program 92 times [2021-02-19 18:28:14,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:14,290 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250120594] [2021-02-19 18:28:14,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:14,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:14,601 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:14,601 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250120594] [2021-02-19 18:28:14,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684188754] [2021-02-19 18:28:14,602 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 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 [2021-02-19 18:28:14,621 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:28:14,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:14,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:14,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:14,916 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:14,916 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:14,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:14,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:14,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:14,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:28:15,134 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:15,135 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:15,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:15,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648217482] [2021-02-19 18:28:15,135 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:15,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:15,135 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:15,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:15,136 INFO L87 Difference]: Start difference. First operand 902 states and 1828 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:17,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:17,387 INFO L93 Difference]: Finished difference Result 1204 states and 2391 transitions. [2021-02-19 18:28:17,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:28:17,388 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:17,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:17,390 INFO L225 Difference]: With dead ends: 1204 [2021-02-19 18:28:17,390 INFO L226 Difference]: Without dead ends: 1160 [2021-02-19 18:28:17,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=303, Invalid=3237, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:28:17,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1160 states. [2021-02-19 18:28:17,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1160 to 898. [2021-02-19 18:28:17,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 898 states, 897 states have (on average 2.0256410256410255) internal successors, (1817), 897 states have internal predecessors, (1817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:17,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 898 states to 898 states and 1817 transitions. [2021-02-19 18:28:17,399 INFO L78 Accepts]: Start accepts. Automaton has 898 states and 1817 transitions. Word has length 33 [2021-02-19 18:28:17,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:17,399 INFO L480 AbstractCegarLoop]: Abstraction has 898 states and 1817 transitions. [2021-02-19 18:28:17,399 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:17,399 INFO L276 IsEmpty]: Start isEmpty. Operand 898 states and 1817 transitions. [2021-02-19 18:28:17,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:17,401 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:17,401 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:17,601 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:17,602 INFO L428 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:17,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:17,602 INFO L82 PathProgramCache]: Analyzing trace with hash -872700966, now seen corresponding path program 93 times [2021-02-19 18:28:17,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:17,602 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345099114] [2021-02-19 18:28:17,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:17,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:17,960 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:17,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345099114] [2021-02-19 18:28:17,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350107343] [2021-02-19 18:28:17,960 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 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 [2021-02-19 18:28:17,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:28:17,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:17,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:17,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:18,257 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:28:18,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:28:18,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:18,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:18,267 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:18,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:34, output treesize:16 [2021-02-19 18:28:18,502 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:18,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:18,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:18,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262624767] [2021-02-19 18:28:18,503 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:18,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:18,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:18,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:18,504 INFO L87 Difference]: Start difference. First operand 898 states and 1817 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:19,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:19,958 INFO L93 Difference]: Finished difference Result 1027 states and 2063 transitions. [2021-02-19 18:28:19,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:28:19,958 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:19,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:19,960 INFO L225 Difference]: With dead ends: 1027 [2021-02-19 18:28:19,960 INFO L226 Difference]: Without dead ends: 999 [2021-02-19 18:28:19,960 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 539 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:28:19,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 999 states. [2021-02-19 18:28:19,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 999 to 890. [2021-02-19 18:28:19,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 2.0258717660292462) internal successors, (1801), 889 states have internal predecessors, (1801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:19,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 1801 transitions. [2021-02-19 18:28:19,969 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 1801 transitions. Word has length 33 [2021-02-19 18:28:19,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:19,969 INFO L480 AbstractCegarLoop]: Abstraction has 890 states and 1801 transitions. [2021-02-19 18:28:19,969 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:19,969 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 1801 transitions. [2021-02-19 18:28:19,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:19,970 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:19,970 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:20,171 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-02-19 18:28:20,171 INFO L428 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:20,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:20,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1603922840, now seen corresponding path program 94 times [2021-02-19 18:28:20,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:20,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304495377] [2021-02-19 18:28:20,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:20,510 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:20,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304495377] [2021-02-19 18:28:20,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052928408] [2021-02-19 18:28:20,510 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 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 [2021-02-19 18:28:20,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:28:20,530 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:20,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:20,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:20,895 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:20,896 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:20,897 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:20,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:20,905 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:20,905 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:28:21,066 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:21,067 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:21,067 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:21,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943559763] [2021-02-19 18:28:21,067 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:21,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:21,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:21,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:21,068 INFO L87 Difference]: Start difference. First operand 890 states and 1801 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:22,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:22,670 INFO L93 Difference]: Finished difference Result 1070 states and 2128 transitions. [2021-02-19 18:28:22,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:28:22,671 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:22,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:22,672 INFO L225 Difference]: With dead ends: 1070 [2021-02-19 18:28:22,672 INFO L226 Difference]: Without dead ends: 974 [2021-02-19 18:28:22,673 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=292, Invalid=3130, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:28:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 974 states. [2021-02-19 18:28:22,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 974 to 907. [2021-02-19 18:28:22,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0275938189845473) internal successors, (1837), 906 states have internal predecessors, (1837), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:22,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1837 transitions. [2021-02-19 18:28:22,681 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1837 transitions. Word has length 33 [2021-02-19 18:28:22,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:22,681 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 1837 transitions. [2021-02-19 18:28:22,681 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:22,681 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1837 transitions. [2021-02-19 18:28:22,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:22,682 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:22,682 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:22,883 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-02-19 18:28:22,883 INFO L428 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:22,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:22,883 INFO L82 PathProgramCache]: Analyzing trace with hash -1305421866, now seen corresponding path program 95 times [2021-02-19 18:28:22,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:22,884 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1252346587] [2021-02-19 18:28:22,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:23,234 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:23,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1252346587] [2021-02-19 18:28:23,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26694866] [2021-02-19 18:28:23,235 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 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 [2021-02-19 18:28:23,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:28:23,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:23,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:28:23,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:23,606 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:28:23,606 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:28:23,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:23,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:23,620 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:23,620 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:28:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:23,839 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:23,839 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-02-19 18:28:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435038357] [2021-02-19 18:28:23,839 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:28:23,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:28:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:28:23,840 INFO L87 Difference]: Start difference. First operand 907 states and 1837 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 18:28:26,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:26,235 INFO L93 Difference]: Finished difference Result 1128 states and 2252 transitions. [2021-02-19 18:28:26,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:28:26,236 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:26,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:26,237 INFO L225 Difference]: With dead ends: 1128 [2021-02-19 18:28:26,237 INFO L226 Difference]: Without dead ends: 1033 [2021-02-19 18:28:26,237 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1405 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=410, Invalid=4282, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:28:26,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1033 states. [2021-02-19 18:28:26,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1033 to 916. [2021-02-19 18:28:26,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 916 states, 915 states have (on average 2.0273224043715845) internal successors, (1855), 915 states have internal predecessors, (1855), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:26,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 916 states to 916 states and 1855 transitions. [2021-02-19 18:28:26,246 INFO L78 Accepts]: Start accepts. Automaton has 916 states and 1855 transitions. Word has length 33 [2021-02-19 18:28:26,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:26,246 INFO L480 AbstractCegarLoop]: Abstraction has 916 states and 1855 transitions. [2021-02-19 18:28:26,246 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 18:28:26,246 INFO L276 IsEmpty]: Start isEmpty. Operand 916 states and 1855 transitions. [2021-02-19 18:28:26,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:26,248 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:26,248 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:26,451 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-02-19 18:28:26,451 INFO L428 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:26,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:26,451 INFO L82 PathProgramCache]: Analyzing trace with hash -1946532456, now seen corresponding path program 96 times [2021-02-19 18:28:26,452 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:26,452 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398854117] [2021-02-19 18:28:26,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:26,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:26,786 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:26,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398854117] [2021-02-19 18:28:26,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900814304] [2021-02-19 18:28:26,786 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 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 [2021-02-19 18:28:26,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:28:26,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:26,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:26,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:27,106 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:27,106 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:27,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:27,114 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:27,115 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:27,115 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:28:27,302 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:27,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:27,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:27,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205140615] [2021-02-19 18:28:27,302 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:27,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:27,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:27,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:27,303 INFO L87 Difference]: Start difference. First operand 916 states and 1855 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:29,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:29,869 INFO L93 Difference]: Finished difference Result 1153 states and 2299 transitions. [2021-02-19 18:28:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:28:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:29,871 INFO L225 Difference]: With dead ends: 1153 [2021-02-19 18:28:29,871 INFO L226 Difference]: Without dead ends: 1073 [2021-02-19 18:28:29,872 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1450 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=537, Invalid=4433, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:28:29,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1073 states. [2021-02-19 18:28:29,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1073 to 912. [2021-02-19 18:28:29,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 2.0241492864983535) internal successors, (1844), 911 states have internal predecessors, (1844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:29,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 1844 transitions. [2021-02-19 18:28:29,881 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 1844 transitions. Word has length 33 [2021-02-19 18:28:29,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:29,881 INFO L480 AbstractCegarLoop]: Abstraction has 912 states and 1844 transitions. [2021-02-19 18:28:29,881 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:29,881 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 1844 transitions. [2021-02-19 18:28:29,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:29,882 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:29,882 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:30,086 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:30,086 INFO L428 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:30,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:30,086 INFO L82 PathProgramCache]: Analyzing trace with hash -520290090, now seen corresponding path program 97 times [2021-02-19 18:28:30,087 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:30,087 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107848110] [2021-02-19 18:28:30,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:30,431 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:30,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107848110] [2021-02-19 18:28:30,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300610523] [2021-02-19 18:28:30,431 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:28:30,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:30,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:30,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:30,784 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:30,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:30,786 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:30,792 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:30,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:30,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:28:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:30,982 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:30,982 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:30,982 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443227192] [2021-02-19 18:28:30,983 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:30,983 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:30,983 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:30,983 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:30,983 INFO L87 Difference]: Start difference. First operand 912 states and 1844 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:33,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:33,904 INFO L93 Difference]: Finished difference Result 1223 states and 2439 transitions. [2021-02-19 18:28:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:28:33,904 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:33,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:33,906 INFO L225 Difference]: With dead ends: 1223 [2021-02-19 18:28:33,906 INFO L226 Difference]: Without dead ends: 1164 [2021-02-19 18:28:33,906 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1571 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=559, Invalid=4843, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:28:33,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1164 states. [2021-02-19 18:28:33,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1164 to 907. [2021-02-19 18:28:33,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 2.0242825607064017) internal successors, (1834), 906 states have internal predecessors, (1834), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:33,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1834 transitions. [2021-02-19 18:28:33,915 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1834 transitions. Word has length 33 [2021-02-19 18:28:33,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:33,916 INFO L480 AbstractCegarLoop]: Abstraction has 907 states and 1834 transitions. [2021-02-19 18:28:33,916 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:33,916 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1834 transitions. [2021-02-19 18:28:33,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:33,917 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:33,917 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:34,117 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-02-19 18:28:34,117 INFO L428 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:34,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:34,117 INFO L82 PathProgramCache]: Analyzing trace with hash -1434922836, now seen corresponding path program 98 times [2021-02-19 18:28:34,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:34,118 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1816469712] [2021-02-19 18:28:34,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:34,459 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:34,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1816469712] [2021-02-19 18:28:34,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960371963] [2021-02-19 18:28:34,460 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 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 [2021-02-19 18:28:34,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:28:34,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:34,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:34,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:34,752 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:34,753 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:34,754 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:34,763 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:34,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:34,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:28:35,016 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:35,016 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:35,016 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:35,016 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715155793] [2021-02-19 18:28:35,016 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:35,016 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:35,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:35,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:35,017 INFO L87 Difference]: Start difference. First operand 907 states and 1834 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:37,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:37,472 INFO L93 Difference]: Finished difference Result 1093 states and 2183 transitions. [2021-02-19 18:28:37,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:28:37,473 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:37,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:37,474 INFO L225 Difference]: With dead ends: 1093 [2021-02-19 18:28:37,474 INFO L226 Difference]: Without dead ends: 1034 [2021-02-19 18:28:37,475 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1203 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=413, Invalid=4009, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:28:37,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1034 states. [2021-02-19 18:28:37,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1034 to 922. [2021-02-19 18:28:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 921 states have (on average 2.023887079261672) internal successors, (1864), 921 states have internal predecessors, (1864), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:37,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1864 transitions. [2021-02-19 18:28:37,483 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1864 transitions. Word has length 33 [2021-02-19 18:28:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:37,483 INFO L480 AbstractCegarLoop]: Abstraction has 922 states and 1864 transitions. [2021-02-19 18:28:37,483 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1864 transitions. [2021-02-19 18:28:37,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:37,484 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:37,484 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:37,689 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:37,689 INFO L428 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:37,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:37,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1276607946, now seen corresponding path program 99 times [2021-02-19 18:28:37,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:37,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211248743] [2021-02-19 18:28:37,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:37,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:38,144 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:38,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211248743] [2021-02-19 18:28:38,145 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891153523] [2021-02-19 18:28:38,145 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 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 [2021-02-19 18:28:38,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:28:38,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:38,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:38,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:38,526 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:28:38,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:28:38,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:38,539 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:38,539 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:38,539 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:28:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:38,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:38,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:38,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1088207590] [2021-02-19 18:28:38,696 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:38,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:38,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:38,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:38,696 INFO L87 Difference]: Start difference. First operand 922 states and 1864 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:40,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:40,643 INFO L93 Difference]: Finished difference Result 1156 states and 2301 transitions. [2021-02-19 18:28:40,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:28:40,644 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:40,646 INFO L225 Difference]: With dead ends: 1156 [2021-02-19 18:28:40,646 INFO L226 Difference]: Without dead ends: 1060 [2021-02-19 18:28:40,647 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=287, Invalid=3019, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:28:40,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1060 states. [2021-02-19 18:28:40,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1060 to 966. [2021-02-19 18:28:40,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 966 states, 965 states have (on average 2.0300518134715024) internal successors, (1959), 965 states have internal predecessors, (1959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:40,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 966 states to 966 states and 1959 transitions. [2021-02-19 18:28:40,656 INFO L78 Accepts]: Start accepts. Automaton has 966 states and 1959 transitions. Word has length 33 [2021-02-19 18:28:40,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:40,656 INFO L480 AbstractCegarLoop]: Abstraction has 966 states and 1959 transitions. [2021-02-19 18:28:40,656 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:40,656 INFO L276 IsEmpty]: Start isEmpty. Operand 966 states and 1959 transitions. [2021-02-19 18:28:40,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:40,657 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:40,657 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:40,859 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-02-19 18:28:40,859 INFO L428 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:40,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:40,860 INFO L82 PathProgramCache]: Analyzing trace with hash -1632736760, now seen corresponding path program 100 times [2021-02-19 18:28:40,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:40,860 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387554191] [2021-02-19 18:28:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:40,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:41,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:41,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387554191] [2021-02-19 18:28:41,267 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368636755] [2021-02-19 18:28:41,267 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 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 [2021-02-19 18:28:41,290 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:28:41,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:41,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:41,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:41,704 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:41,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:41,706 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:41,713 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:41,714 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:41,715 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:28:41,890 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:41,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:41,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:41,890 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684737354] [2021-02-19 18:28:41,890 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:41,890 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:41,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:41,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=895, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:41,891 INFO L87 Difference]: Start difference. First operand 966 states and 1959 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:44,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:44,880 INFO L93 Difference]: Finished difference Result 1272 states and 2548 transitions. [2021-02-19 18:28:44,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:28:44,881 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:44,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:44,883 INFO L225 Difference]: With dead ends: 1272 [2021-02-19 18:28:44,883 INFO L226 Difference]: Without dead ends: 1170 [2021-02-19 18:28:44,883 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1489 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=447, Invalid=4523, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:28:44,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1170 states. [2021-02-19 18:28:44,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1170 to 1008. [2021-02-19 18:28:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1007 states have (on average 2.034756703078451) internal successors, (2049), 1007 states have internal predecessors, (2049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:44,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 2049 transitions. [2021-02-19 18:28:44,893 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 2049 transitions. Word has length 33 [2021-02-19 18:28:44,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:44,893 INFO L480 AbstractCegarLoop]: Abstraction has 1008 states and 2049 transitions. [2021-02-19 18:28:44,893 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:44,893 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 2049 transitions. [2021-02-19 18:28:44,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:44,894 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:44,894 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:45,095 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:45,095 INFO L428 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:45,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:45,095 INFO L82 PathProgramCache]: Analyzing trace with hash 2021119946, now seen corresponding path program 101 times [2021-02-19 18:28:45,095 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:45,095 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914351372] [2021-02-19 18:28:45,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:45,461 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:45,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914351372] [2021-02-19 18:28:45,461 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246508896] [2021-02-19 18:28:45,461 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 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 [2021-02-19 18:28:45,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:28:45,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:45,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:28:45,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:45,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:28:45,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:28:45,854 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:28:45,855 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:28:45,856 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:45,866 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:45,868 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:45,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:43, output treesize:13 [2021-02-19 18:28:46,138 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:46,138 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:46,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-02-19 18:28:46,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933928899] [2021-02-19 18:28:46,139 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:28:46,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:46,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:28:46,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:28:46,140 INFO L87 Difference]: Start difference. First operand 1008 states and 2049 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 18:28:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:50,342 INFO L93 Difference]: Finished difference Result 1420 states and 2865 transitions. [2021-02-19 18:28:50,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 18:28:50,343 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:50,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:50,344 INFO L225 Difference]: With dead ends: 1420 [2021-02-19 18:28:50,344 INFO L226 Difference]: Without dead ends: 1321 [2021-02-19 18:28:50,345 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2781 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=797, Invalid=7945, Unknown=0, NotChecked=0, Total=8742 [2021-02-19 18:28:50,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1321 states. [2021-02-19 18:28:50,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1321 to 1033. [2021-02-19 18:28:50,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1033 states, 1032 states have (on average 2.0339147286821704) internal successors, (2099), 1032 states have internal predecessors, (2099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:50,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1033 states to 1033 states and 2099 transitions. [2021-02-19 18:28:50,355 INFO L78 Accepts]: Start accepts. Automaton has 1033 states and 2099 transitions. Word has length 33 [2021-02-19 18:28:50,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:50,355 INFO L480 AbstractCegarLoop]: Abstraction has 1033 states and 2099 transitions. [2021-02-19 18:28:50,355 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 18:28:50,355 INFO L276 IsEmpty]: Start isEmpty. Operand 1033 states and 2099 transitions. [2021-02-19 18:28:50,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:50,356 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:50,356 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:50,557 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:28:50,557 INFO L428 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:50,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:50,557 INFO L82 PathProgramCache]: Analyzing trace with hash -847604984, now seen corresponding path program 102 times [2021-02-19 18:28:50,557 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:50,558 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707248089] [2021-02-19 18:28:50,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:50,924 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:50,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707248089] [2021-02-19 18:28:50,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1902349659] [2021-02-19 18:28:50,925 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 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 [2021-02-19 18:28:50,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:28:50,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:28:50,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:28:50,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:51,279 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:51,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:51,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:51,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:51,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:51,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-02-19 18:28:51,487 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:51,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:51,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:51,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793844076] [2021-02-19 18:28:51,488 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:51,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:51,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:51,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:51,488 INFO L87 Difference]: Start difference. First operand 1033 states and 2099 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:56,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:28:56,174 INFO L93 Difference]: Finished difference Result 1535 states and 3095 transitions. [2021-02-19 18:28:56,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 18:28:56,175 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:28:56,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:28:56,178 INFO L225 Difference]: With dead ends: 1535 [2021-02-19 18:28:56,178 INFO L226 Difference]: Without dead ends: 1473 [2021-02-19 18:28:56,178 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2762 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=799, Invalid=7757, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 18:28:56,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1473 states. [2021-02-19 18:28:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1473 to 1125. [2021-02-19 18:28:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1125 states, 1124 states have (on average 2.038256227758007) internal successors, (2291), 1124 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:28:56,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1125 states to 1125 states and 2291 transitions. [2021-02-19 18:28:56,189 INFO L78 Accepts]: Start accepts. Automaton has 1125 states and 2291 transitions. Word has length 33 [2021-02-19 18:28:56,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:28:56,189 INFO L480 AbstractCegarLoop]: Abstraction has 1125 states and 2291 transitions. [2021-02-19 18:28:56,189 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:28:56,189 INFO L276 IsEmpty]: Start isEmpty. Operand 1125 states and 2291 transitions. [2021-02-19 18:28:56,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:28:56,190 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:28:56,190 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:28:56,391 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-02-19 18:28:56,391 INFO L428 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:28:56,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:28:56,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1762237730, now seen corresponding path program 103 times [2021-02-19 18:28:56,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:28:56,391 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615491587] [2021-02-19 18:28:56,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:28:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:56,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:56,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615491587] [2021-02-19 18:28:56,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678192023] [2021-02-19 18:28:56,801 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 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 [2021-02-19 18:28:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:28:56,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:28:56,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:28:57,113 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:28:57,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:28:57,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:28:57,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:28:57,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:28:57,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:28:57,372 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:28:57,373 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:28:57,373 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:28:57,373 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916871774] [2021-02-19 18:28:57,373 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:28:57,373 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:28:57,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:28:57,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:28:57,374 INFO L87 Difference]: Start difference. First operand 1125 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:00,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:00,081 INFO L93 Difference]: Finished difference Result 1427 states and 2865 transitions. [2021-02-19 18:29:00,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:29:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:00,084 INFO L225 Difference]: With dead ends: 1427 [2021-02-19 18:29:00,084 INFO L226 Difference]: Without dead ends: 1371 [2021-02-19 18:29:00,084 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=411, Invalid=3879, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:29:00,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2021-02-19 18:29:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 1213. [2021-02-19 18:29:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1213 states, 1212 states have (on average 2.0354785478547854) internal successors, (2467), 1212 states have internal predecessors, (2467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:00,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1213 states to 1213 states and 2467 transitions. [2021-02-19 18:29:00,096 INFO L78 Accepts]: Start accepts. Automaton has 1213 states and 2467 transitions. Word has length 33 [2021-02-19 18:29:00,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:00,096 INFO L480 AbstractCegarLoop]: Abstraction has 1213 states and 2467 transitions. [2021-02-19 18:29:00,096 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:00,096 INFO L276 IsEmpty]: Start isEmpty. Operand 1213 states and 2467 transitions. [2021-02-19 18:29:00,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:00,097 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:00,097 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:00,297 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:00,298 INFO L428 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:00,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:00,298 INFO L82 PathProgramCache]: Analyzing trace with hash -1758821452, now seen corresponding path program 104 times [2021-02-19 18:29:00,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:00,298 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001877243] [2021-02-19 18:29:00,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:00,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:00,714 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:00,714 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001877243] [2021-02-19 18:29:00,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078295690] [2021-02-19 18:29:00,715 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 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 [2021-02-19 18:29:00,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:29:00,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:00,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:00,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:01,155 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:29:01,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:29:01,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:01,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:01,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:01,167 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:29:01,348 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:01,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:01,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:01,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471739381] [2021-02-19 18:29:01,348 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:01,348 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:01,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:01,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:01,349 INFO L87 Difference]: Start difference. First operand 1213 states and 2467 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:04,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:04,723 INFO L93 Difference]: Finished difference Result 1723 states and 3477 transitions. [2021-02-19 18:29:04,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-02-19 18:29:04,724 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:04,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:04,726 INFO L225 Difference]: With dead ends: 1723 [2021-02-19 18:29:04,726 INFO L226 Difference]: Without dead ends: 1635 [2021-02-19 18:29:04,727 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1823 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=518, Invalid=5488, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 18:29:04,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-02-19 18:29:04,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1449. [2021-02-19 18:29:04,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1449 states, 1448 states have (on average 2.033839779005525) internal successors, (2945), 1448 states have internal predecessors, (2945), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:04,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1449 states to 1449 states and 2945 transitions. [2021-02-19 18:29:04,741 INFO L78 Accepts]: Start accepts. Automaton has 1449 states and 2945 transitions. Word has length 33 [2021-02-19 18:29:04,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:04,741 INFO L480 AbstractCegarLoop]: Abstraction has 1449 states and 2945 transitions. [2021-02-19 18:29:04,741 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:04,741 INFO L276 IsEmpty]: Start isEmpty. Operand 1449 states and 2945 transitions. [2021-02-19 18:29:04,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:04,743 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:04,743 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:04,953 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:04,953 INFO L428 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:04,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:04,954 INFO L82 PathProgramCache]: Analyzing trace with hash 1895035254, now seen corresponding path program 105 times [2021-02-19 18:29:04,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:04,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765803728] [2021-02-19 18:29:04,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:04,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:05,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765803728] [2021-02-19 18:29:05,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190292867] [2021-02-19 18:29:05,410 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 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 [2021-02-19 18:29:05,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:29:05,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:05,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:05,799 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:29:05,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:29:05,801 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:05,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:05,809 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:05,809 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:29:06,019 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:06,020 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:06,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:06,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054824250] [2021-02-19 18:29:06,020 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:06,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:06,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:06,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=892, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:06,021 INFO L87 Difference]: Start difference. First operand 1449 states and 2945 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:09,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:09,951 INFO L93 Difference]: Finished difference Result 1938 states and 3950 transitions. [2021-02-19 18:29:09,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-02-19 18:29:09,952 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:09,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:09,954 INFO L225 Difference]: With dead ends: 1938 [2021-02-19 18:29:09,954 INFO L226 Difference]: Without dead ends: 1858 [2021-02-19 18:29:09,955 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=642, Invalid=6668, Unknown=0, NotChecked=0, Total=7310 [2021-02-19 18:29:09,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1858 states. [2021-02-19 18:29:09,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1858 to 1298. [2021-02-19 18:29:09,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 2.0323824209714725) internal successors, (2636), 1297 states have internal predecessors, (2636), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:09,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 2636 transitions. [2021-02-19 18:29:09,970 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 2636 transitions. Word has length 33 [2021-02-19 18:29:09,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:09,970 INFO L480 AbstractCegarLoop]: Abstraction has 1298 states and 2636 transitions. [2021-02-19 18:29:09,970 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:09,970 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 2636 transitions. [2021-02-19 18:29:09,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:09,972 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:09,972 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:10,182 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-02-19 18:29:10,182 INFO L428 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:10,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:10,182 INFO L82 PathProgramCache]: Analyzing trace with hash -973689676, now seen corresponding path program 106 times [2021-02-19 18:29:10,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:10,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492931737] [2021-02-19 18:29:10,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:10,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:10,615 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:10,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492931737] [2021-02-19 18:29:10,616 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1552535197] [2021-02-19 18:29:10,616 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 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 [2021-02-19 18:29:10,636 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:29:10,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:10,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:10,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:11,005 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:29:11,006 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:29:11,007 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:11,015 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:11,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:11,016 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:29:11,231 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:11,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:11,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:11,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299195910] [2021-02-19 18:29:11,232 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:11,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:11,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:11,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:11,233 INFO L87 Difference]: Start difference. First operand 1298 states and 2636 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:15,534 INFO L93 Difference]: Finished difference Result 1677 states and 3376 transitions. [2021-02-19 18:29:15,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 18:29:15,535 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:15,537 INFO L225 Difference]: With dead ends: 1677 [2021-02-19 18:29:15,537 INFO L226 Difference]: Without dead ends: 1621 [2021-02-19 18:29:15,538 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2651 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=733, Invalid=7457, Unknown=0, NotChecked=0, Total=8190 [2021-02-19 18:29:15,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1621 states. [2021-02-19 18:29:15,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1621 to 1260. [2021-02-19 18:29:15,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1260 states, 1259 states have (on average 2.0309769658459094) internal successors, (2557), 1259 states have internal predecessors, (2557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:15,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1260 states to 1260 states and 2557 transitions. [2021-02-19 18:29:15,550 INFO L78 Accepts]: Start accepts. Automaton has 1260 states and 2557 transitions. Word has length 33 [2021-02-19 18:29:15,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:15,550 INFO L480 AbstractCegarLoop]: Abstraction has 1260 states and 2557 transitions. [2021-02-19 18:29:15,550 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:15,550 INFO L276 IsEmpty]: Start isEmpty. Operand 1260 states and 2557 transitions. [2021-02-19 18:29:15,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:15,551 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:15,551 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:15,751 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-02-19 18:29:15,752 INFO L428 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:15,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:15,752 INFO L82 PathProgramCache]: Analyzing trace with hash -1078536294, now seen corresponding path program 107 times [2021-02-19 18:29:15,752 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:15,752 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401358033] [2021-02-19 18:29:15,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:15,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:16,232 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:16,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401358033] [2021-02-19 18:29:16,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612932285] [2021-02-19 18:29:16,233 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2021-02-19 18:29:16,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:29:16,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:16,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:29:16,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:16,618 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:29:16,620 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:29:16,621 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:29:16,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 27 treesize of output 13 [2021-02-19 18:29:16,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:16,642 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:16,644 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:16,644 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:46, output treesize:16 [2021-02-19 18:29:17,011 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:17,011 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:17,011 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-02-19 18:29:17,011 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689568123] [2021-02-19 18:29:17,012 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:29:17,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:17,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:29:17,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=1008, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:29:17,012 INFO L87 Difference]: Start difference. First operand 1260 states and 2557 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 18:29:20,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:20,319 INFO L93 Difference]: Finished difference Result 1775 states and 3563 transitions. [2021-02-19 18:29:20,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:29:20,320 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:20,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:20,322 INFO L225 Difference]: With dead ends: 1775 [2021-02-19 18:29:20,322 INFO L226 Difference]: Without dead ends: 1705 [2021-02-19 18:29:20,323 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1557 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=519, Invalid=4883, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:29:20,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1705 states. [2021-02-19 18:29:20,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1705 to 1472. [2021-02-19 18:29:20,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:20,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-02-19 18:29:20,337 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-02-19 18:29:20,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:20,337 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-02-19 18:29:20,337 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 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) [2021-02-19 18:29:20,337 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-02-19 18:29:20,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:20,339 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:20,339 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:20,539 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-02-19 18:29:20,539 INFO L428 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:20,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:20,539 INFO L82 PathProgramCache]: Analyzing trace with hash 279792224, now seen corresponding path program 108 times [2021-02-19 18:29:20,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:20,540 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216150990] [2021-02-19 18:29:20,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:20,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:20,989 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:20,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216150990] [2021-02-19 18:29:20,990 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358683993] [2021-02-19 18:29:20,990 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 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 [2021-02-19 18:29:21,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:29:21,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:21,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:29:21,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:21,564 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:29:21,564 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:29:21,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:21,577 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:21,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:21,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:13 [2021-02-19 18:29:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:21,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:21,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:21,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552649870] [2021-02-19 18:29:21,821 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:21,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:21,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:21,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:21,822 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:23,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:23,917 INFO L93 Difference]: Finished difference Result 1677 states and 3355 transitions. [2021-02-19 18:29:23,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:29:23,918 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:23,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:23,920 INFO L225 Difference]: With dead ends: 1677 [2021-02-19 18:29:23,920 INFO L226 Difference]: Without dead ends: 1581 [2021-02-19 18:29:23,921 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=290, Invalid=2902, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:29:23,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1581 states. [2021-02-19 18:29:23,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1581 to 1497. [2021-02-19 18:29:23,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1497 states, 1496 states have (on average 2.0267379679144386) internal successors, (3032), 1496 states have internal predecessors, (3032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:23,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1497 states to 1497 states and 3032 transitions. [2021-02-19 18:29:23,934 INFO L78 Accepts]: Start accepts. Automaton has 1497 states and 3032 transitions. Word has length 33 [2021-02-19 18:29:23,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:23,934 INFO L480 AbstractCegarLoop]: Abstraction has 1497 states and 3032 transitions. [2021-02-19 18:29:23,934 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:23,934 INFO L276 IsEmpty]: Start isEmpty. Operand 1497 states and 3032 transitions. [2021-02-19 18:29:23,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:23,935 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:23,935 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:24,135 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:24,136 INFO L428 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:24,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:24,136 INFO L82 PathProgramCache]: Analyzing trace with hash 1665414814, now seen corresponding path program 109 times [2021-02-19 18:29:24,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:24,136 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567248890] [2021-02-19 18:29:24,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:24,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:24,570 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:24,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567248890] [2021-02-19 18:29:24,570 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165454953] [2021-02-19 18:29:24,570 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 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 [2021-02-19 18:29:24,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:24,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:24,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:25,032 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:29:25,032 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:29:25,034 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:25,042 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:25,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:25,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:29:25,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:25,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:25,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:25,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639439361] [2021-02-19 18:29:25,243 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:25,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:25,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:25,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=889, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:25,243 INFO L87 Difference]: Start difference. First operand 1497 states and 3032 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:27,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:27,380 INFO L93 Difference]: Finished difference Result 1692 states and 3391 transitions. [2021-02-19 18:29:27,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:29:27,389 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:27,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:27,390 INFO L225 Difference]: With dead ends: 1692 [2021-02-19 18:29:27,390 INFO L226 Difference]: Without dead ends: 1604 [2021-02-19 18:29:27,390 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 930 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=294, Invalid=2898, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:29:27,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-02-19 18:29:27,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1500. [2021-02-19 18:29:27,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1500 states, 1499 states have (on average 2.026684456304203) internal successors, (3038), 1499 states have internal predecessors, (3038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:27,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1500 states to 1500 states and 3038 transitions. [2021-02-19 18:29:27,404 INFO L78 Accepts]: Start accepts. Automaton has 1500 states and 3038 transitions. Word has length 33 [2021-02-19 18:29:27,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:27,404 INFO L480 AbstractCegarLoop]: Abstraction has 1500 states and 3038 transitions. [2021-02-19 18:29:27,404 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:27,404 INFO L276 IsEmpty]: Start isEmpty. Operand 1500 states and 3038 transitions. [2021-02-19 18:29:27,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:27,405 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:27,406 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:27,606 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-02-19 18:29:27,606 INFO L428 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:27,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:27,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1024304224, now seen corresponding path program 110 times [2021-02-19 18:29:27,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:27,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107644348] [2021-02-19 18:29:27,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:27,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:28,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:28,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107644348] [2021-02-19 18:29:28,061 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147850830] [2021-02-19 18:29:28,061 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 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 [2021-02-19 18:29:28,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:29:28,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:28,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:28,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:28,463 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:29:28,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:29:28,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:28,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:28,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:28,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:29:28,720 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:28,720 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:28,720 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:28,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971929006] [2021-02-19 18:29:28,721 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:28,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:28,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:28,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=882, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:28,722 INFO L87 Difference]: Start difference. First operand 1500 states and 3038 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:31,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:31,859 INFO L93 Difference]: Finished difference Result 1779 states and 3570 transitions. [2021-02-19 18:29:31,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:29:31,861 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:31,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:31,863 INFO L225 Difference]: With dead ends: 1779 [2021-02-19 18:29:31,863 INFO L226 Difference]: Without dead ends: 1683 [2021-02-19 18:29:31,864 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1585 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=501, Invalid=4611, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 18:29:31,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1683 states. [2021-02-19 18:29:31,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1683 to 1505. [2021-02-19 18:29:31,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1505 states, 1504 states have (on average 2.02593085106383) internal successors, (3047), 1504 states have internal predecessors, (3047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:31,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1505 states to 1505 states and 3047 transitions. [2021-02-19 18:29:31,878 INFO L78 Accepts]: Start accepts. Automaton has 1505 states and 3047 transitions. Word has length 33 [2021-02-19 18:29:31,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:31,878 INFO L480 AbstractCegarLoop]: Abstraction has 1505 states and 3047 transitions. [2021-02-19 18:29:31,878 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:31,879 INFO L276 IsEmpty]: Start isEmpty. Operand 1505 states and 3047 transitions. [2021-02-19 18:29:31,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:31,880 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:31,880 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:32,080 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-02-19 18:29:32,081 INFO L428 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:32,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:32,081 INFO L82 PathProgramCache]: Analyzing trace with hash -1844420706, now seen corresponding path program 111 times [2021-02-19 18:29:32,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:32,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216607552] [2021-02-19 18:29:32,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:32,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:32,565 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:32,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216607552] [2021-02-19 18:29:32,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130565630] [2021-02-19 18:29:32,566 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 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 [2021-02-19 18:29:32,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:29:32,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:32,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:32,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:32,964 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:29:32,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:29:32,966 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:32,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:32,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:32,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:29:33,207 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:33,208 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:33,208 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:33,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953634104] [2021-02-19 18:29:33,208 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:33,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:33,208 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:33,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=883, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:33,209 INFO L87 Difference]: Start difference. First operand 1505 states and 3047 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:37,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:37,664 INFO L93 Difference]: Finished difference Result 1945 states and 3897 transitions. [2021-02-19 18:29:37,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 18:29:37,665 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:37,668 INFO L225 Difference]: With dead ends: 1945 [2021-02-19 18:29:37,668 INFO L226 Difference]: Without dead ends: 1867 [2021-02-19 18:29:37,668 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2317 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=689, Invalid=6451, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 18:29:37,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1867 states. [2021-02-19 18:29:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1867 to 1496. [2021-02-19 18:29:37,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.0247491638795987) internal successors, (3027), 1495 states have internal predecessors, (3027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:37,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3027 transitions. [2021-02-19 18:29:37,684 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3027 transitions. Word has length 33 [2021-02-19 18:29:37,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:37,685 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3027 transitions. [2021-02-19 18:29:37,685 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:37,685 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3027 transitions. [2021-02-19 18:29:37,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:37,686 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:37,686 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:37,886 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-02-19 18:29:37,887 INFO L428 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:37,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:37,887 INFO L82 PathProgramCache]: Analyzing trace with hash 1535913844, now seen corresponding path program 112 times [2021-02-19 18:29:37,887 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:37,887 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495843169] [2021-02-19 18:29:37,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:38,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495843169] [2021-02-19 18:29:38,389 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812926365] [2021-02-19 18:29:38,389 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 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 [2021-02-19 18:29:38,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:29:38,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:38,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:38,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:38,777 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:29:38,777 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:29:38,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:38,791 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:38,792 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:38,792 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:29:39,121 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:39,122 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:39,122 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:39,122 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311585314] [2021-02-19 18:29:39,122 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:39,122 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:39,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:39,123 INFO L87 Difference]: Start difference. First operand 1496 states and 3027 transitions. Second operand has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:42,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:42,705 INFO L93 Difference]: Finished difference Result 1709 states and 3422 transitions. [2021-02-19 18:29:42,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:29:42,707 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:42,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:42,709 INFO L225 Difference]: With dead ends: 1709 [2021-02-19 18:29:42,709 INFO L226 Difference]: Without dead ends: 1647 [2021-02-19 18:29:42,710 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=509, Invalid=4747, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:29:42,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1647 states. [2021-02-19 18:29:42,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1647 to 1473. [2021-02-19 18:29:42,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.027173913043478) internal successors, (2984), 1472 states have internal predecessors, (2984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:42,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 2984 transitions. [2021-02-19 18:29:42,723 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 2984 transitions. Word has length 33 [2021-02-19 18:29:42,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:42,723 INFO L480 AbstractCegarLoop]: Abstraction has 1473 states and 2984 transitions. [2021-02-19 18:29:42,724 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 1.875) internal successors, (60), 31 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) [2021-02-19 18:29:42,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 2984 transitions. [2021-02-19 18:29:42,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:42,725 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:42,725 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:42,925 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:42,926 INFO L428 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:42,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:42,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2032092506, now seen corresponding path program 113 times [2021-02-19 18:29:42,926 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:42,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870194717] [2021-02-19 18:29:42,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:42,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:43,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:43,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870194717] [2021-02-19 18:29:43,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [434262780] [2021-02-19 18:29:43,418 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 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 [2021-02-19 18:29:43,438 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:29:43,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:43,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 35 conjunts are in the unsatisfiable core [2021-02-19 18:29:43,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:43,895 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:29:43,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:29:43,898 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:43,906 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:43,908 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:43,908 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:29:44,206 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:44,206 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:44,206 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 32 [2021-02-19 18:29:44,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592547359] [2021-02-19 18:29:44,207 INFO L460 AbstractCegarLoop]: Interpolant automaton has 33 states [2021-02-19 18:29:44,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:44,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-02-19 18:29:44,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-02-19 18:29:44,207 INFO L87 Difference]: Start difference. First operand 1473 states and 2984 transitions. Second operand has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) [2021-02-19 18:29:47,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:47,019 INFO L93 Difference]: Finished difference Result 1663 states and 3329 transitions. [2021-02-19 18:29:47,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:29:47,020 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:47,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:47,022 INFO L225 Difference]: With dead ends: 1663 [2021-02-19 18:29:47,022 INFO L226 Difference]: Without dead ends: 1575 [2021-02-19 18:29:47,023 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1149 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=361, Invalid=3545, Unknown=0, NotChecked=0, Total=3906 [2021-02-19 18:29:47,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1575 states. [2021-02-19 18:29:47,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1575 to 1495. [2021-02-19 18:29:47,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0254350736278446) internal successors, (3026), 1494 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:47,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3026 transitions. [2021-02-19 18:29:47,037 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3026 transitions. Word has length 33 [2021-02-19 18:29:47,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:47,037 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3026 transitions. [2021-02-19 18:29:47,037 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 33 states, 33 states have (on average 1.8181818181818181) internal successors, (60), 32 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) [2021-02-19 18:29:47,037 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3026 transitions. [2021-02-19 18:29:47,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:47,039 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:47,039 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:47,239 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:47,239 INFO L428 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:47,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:47,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1390981916, now seen corresponding path program 114 times [2021-02-19 18:29:47,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:47,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943438192] [2021-02-19 18:29:47,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:47,721 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:47,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943438192] [2021-02-19 18:29:47,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48073560] [2021-02-19 18:29:47,722 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 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 [2021-02-19 18:29:47,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:29:47,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:47,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:47,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:48,151 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:29:48,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 13 [2021-02-19 18:29:48,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:48,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:48,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:48,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:13 [2021-02-19 18:29:48,429 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:48,429 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:48,429 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-02-19 18:29:48,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120999347] [2021-02-19 18:29:48,430 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:29:48,430 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:48,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:29:48,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:29:48,430 INFO L87 Difference]: Start difference. First operand 1495 states and 3026 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-02-19 18:29:51,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:51,175 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-02-19 18:29:51,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:29:51,176 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:51,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:51,178 INFO L225 Difference]: With dead ends: 1683 [2021-02-19 18:29:51,178 INFO L226 Difference]: Without dead ends: 1611 [2021-02-19 18:29:51,179 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1289 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=430, Invalid=3860, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:29:51,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1611 states. [2021-02-19 18:29:51,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1611 to 1496. [2021-02-19 18:29:51,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:51,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-02-19 18:29:51,194 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-02-19 18:29:51,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:51,194 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-02-19 18:29:51,194 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-02-19 18:29:51,194 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-02-19 18:29:51,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:51,196 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:51,196 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:51,396 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:29:51,397 INFO L428 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:51,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:51,397 INFO L82 PathProgramCache]: Analyzing trace with hash -1477743014, now seen corresponding path program 115 times [2021-02-19 18:29:51,397 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:51,397 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545740219] [2021-02-19 18:29:51,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:51,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:51,915 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545740219] [2021-02-19 18:29:51,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370369366] [2021-02-19 18:29:51,916 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 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 [2021-02-19 18:29:51,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:51,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:51,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:52,349 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:29:52,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-02-19 18:29:52,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:52,361 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:52,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:52,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:31, output treesize:13 [2021-02-19 18:29:52,605 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:52,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:52,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-02-19 18:29:52,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307317462] [2021-02-19 18:29:52,605 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:29:52,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:52,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:29:52,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=827, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:29:52,606 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 transitions. Second operand has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-02-19 18:29:56,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:56,172 INFO L93 Difference]: Finished difference Result 1719 states and 3451 transitions. [2021-02-19 18:29:56,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:29:56,174 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-02-19 18:29:56,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:56,176 INFO L225 Difference]: With dead ends: 1719 [2021-02-19 18:29:56,176 INFO L226 Difference]: Without dead ends: 1657 [2021-02-19 18:29:56,177 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=546, Invalid=4710, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:29:56,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1657 states. [2021-02-19 18:29:56,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1657 to 1472. [2021-02-19 18:29:56,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.0271923861318832) internal successors, (2982), 1471 states have internal predecessors, (2982), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:56,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2982 transitions. [2021-02-19 18:29:56,190 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2982 transitions. Word has length 33 [2021-02-19 18:29:56,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:56,190 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2982 transitions. [2021-02-19 18:29:56,190 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.935483870967742) internal successors, (60), 30 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) [2021-02-19 18:29:56,190 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2982 transitions. [2021-02-19 18:29:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:56,192 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:56,192 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:56,392 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-02-19 18:29:56,392 INFO L428 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:56,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:56,392 INFO L82 PathProgramCache]: Analyzing trace with hash 339707610, now seen corresponding path program 116 times [2021-02-19 18:29:56,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:56,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1199979109] [2021-02-19 18:29:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:29:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:56,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1199979109] [2021-02-19 18:29:56,882 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367493695] [2021-02-19 18:29:56,882 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 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 [2021-02-19 18:29:56,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:29:56,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:29:56,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:29:56,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:29:57,386 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:29:57,386 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:29:57,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:29:57,398 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:29:57,399 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:29:57,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:29:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:29:57,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:29:57,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:29:57,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552969318] [2021-02-19 18:29:57,625 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:29:57,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:29:57,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:29:57,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:29:57,626 INFO L87 Difference]: Start difference. First operand 1472 states and 2982 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) [2021-02-19 18:29:59,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:29:59,515 INFO L93 Difference]: Finished difference Result 1608 states and 3221 transitions. [2021-02-19 18:29:59,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:29:59,517 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 33 [2021-02-19 18:29:59,517 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:29:59,518 INFO L225 Difference]: With dead ends: 1608 [2021-02-19 18:29:59,518 INFO L226 Difference]: Without dead ends: 1560 [2021-02-19 18:29:59,519 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=202, Invalid=2054, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:29:59,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1560 states. [2021-02-19 18:29:59,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1560 to 1483. [2021-02-19 18:29:59,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1483 states, 1482 states have (on average 2.0276653171390016) internal successors, (3005), 1482 states have internal predecessors, (3005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:29:59,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1483 states to 1483 states and 3005 transitions. [2021-02-19 18:29:59,535 INFO L78 Accepts]: Start accepts. Automaton has 1483 states and 3005 transitions. Word has length 33 [2021-02-19 18:29:59,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:29:59,535 INFO L480 AbstractCegarLoop]: Abstraction has 1483 states and 3005 transitions. [2021-02-19 18:29:59,535 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) [2021-02-19 18:29:59,535 INFO L276 IsEmpty]: Start isEmpty. Operand 1483 states and 3005 transitions. [2021-02-19 18:29:59,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:29:59,537 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:29:59,537 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:29:59,750 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-02-19 18:29:59,750 INFO L428 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:29:59,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:29:59,750 INFO L82 PathProgramCache]: Analyzing trace with hash 1619079324, now seen corresponding path program 117 times [2021-02-19 18:29:59,750 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:29:59,750 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525797792] [2021-02-19 18:29:59,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:29:59,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:00,222 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:00,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525797792] [2021-02-19 18:30:00,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1208292988] [2021-02-19 18:30:00,223 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 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 [2021-02-19 18:30:00,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:30:00,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:00,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:00,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:00,722 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:30:00,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:30:00,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:00,736 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:00,737 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:00,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:30:00,984 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:00,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:00,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:00,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367202238] [2021-02-19 18:30:00,985 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:00,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:00,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:00,986 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:00,986 INFO L87 Difference]: Start difference. First operand 1483 states and 3005 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) [2021-02-19 18:30:03,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:03,432 INFO L93 Difference]: Finished difference Result 1645 states and 3288 transitions. [2021-02-19 18:30:03,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-02-19 18:30:03,433 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 33 [2021-02-19 18:30:03,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:03,435 INFO L225 Difference]: With dead ends: 1645 [2021-02-19 18:30:03,435 INFO L226 Difference]: Without dead ends: 1597 [2021-02-19 18:30:03,435 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 555 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=201, Invalid=2055, Unknown=0, NotChecked=0, Total=2256 [2021-02-19 18:30:03,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1597 states. [2021-02-19 18:30:03,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1597 to 1484. [2021-02-19 18:30:03,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.0276466621712745) internal successors, (3007), 1483 states have internal predecessors, (3007), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:03,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3007 transitions. [2021-02-19 18:30:03,447 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3007 transitions. Word has length 33 [2021-02-19 18:30:03,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:03,447 INFO L480 AbstractCegarLoop]: Abstraction has 1484 states and 3007 transitions. [2021-02-19 18:30:03,447 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) [2021-02-19 18:30:03,447 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3007 transitions. [2021-02-19 18:30:03,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:03,448 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:03,448 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:03,648 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-02-19 18:30:03,648 INFO L428 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:03,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:03,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1290265382, now seen corresponding path program 118 times [2021-02-19 18:30:03,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:03,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088857536] [2021-02-19 18:30:03,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:03,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:04,146 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:04,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088857536] [2021-02-19 18:30:04,147 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1165995752] [2021-02-19 18:30:04,147 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 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 [2021-02-19 18:30:04,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:04,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:04,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:04,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:04,694 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:30:04,694 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:30:04,696 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:04,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:04,708 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:04,708 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:30:04,968 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:04,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:04,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:04,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566075101] [2021-02-19 18:30:04,969 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:04,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:04,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:04,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=901, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:04,969 INFO L87 Difference]: Start difference. First operand 1484 states and 3007 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) [2021-02-19 18:30:07,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:07,663 INFO L93 Difference]: Finished difference Result 1683 states and 3366 transitions. [2021-02-19 18:30:07,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-02-19 18:30:07,664 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 33 [2021-02-19 18:30:07,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:07,666 INFO L225 Difference]: With dead ends: 1683 [2021-02-19 18:30:07,666 INFO L226 Difference]: Without dead ends: 1635 [2021-02-19 18:30:07,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 592 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=213, Invalid=2237, Unknown=0, NotChecked=0, Total=2450 [2021-02-19 18:30:07,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1635 states. [2021-02-19 18:30:07,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1635 to 1488. [2021-02-19 18:30:07,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1488 states, 1487 states have (on average 2.027572293207801) internal successors, (3015), 1487 states have internal predecessors, (3015), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:07,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1488 states to 1488 states and 3015 transitions. [2021-02-19 18:30:07,679 INFO L78 Accepts]: Start accepts. Automaton has 1488 states and 3015 transitions. Word has length 33 [2021-02-19 18:30:07,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:07,679 INFO L480 AbstractCegarLoop]: Abstraction has 1488 states and 3015 transitions. [2021-02-19 18:30:07,679 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) [2021-02-19 18:30:07,679 INFO L276 IsEmpty]: Start isEmpty. Operand 1488 states and 3015 transitions. [2021-02-19 18:30:07,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:07,680 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:07,680 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:07,880 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:07,881 INFO L428 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:07,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:07,881 INFO L82 PathProgramCache]: Analyzing trace with hash -1931375972, now seen corresponding path program 119 times [2021-02-19 18:30:07,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:07,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798367798] [2021-02-19 18:30:07,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:07,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:08,404 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:08,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798367798] [2021-02-19 18:30:08,404 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430344720] [2021-02-19 18:30:08,404 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 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 [2021-02-19 18:30:08,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:30:08,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:08,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:08,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:08,865 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:30:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:30:08,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:08,883 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:08,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:08,892 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:30:09,256 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:09,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:09,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:09,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724788720] [2021-02-19 18:30:09,257 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:09,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:09,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:09,257 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:09,257 INFO L87 Difference]: Start difference. First operand 1488 states and 3015 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) [2021-02-19 18:30:12,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:12,067 INFO L93 Difference]: Finished difference Result 1716 states and 3435 transitions. [2021-02-19 18:30:12,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-02-19 18:30:12,069 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 33 [2021-02-19 18:30:12,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:12,071 INFO L225 Difference]: With dead ends: 1716 [2021-02-19 18:30:12,071 INFO L226 Difference]: Without dead ends: 1684 [2021-02-19 18:30:12,071 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=252, Invalid=2504, Unknown=0, NotChecked=0, Total=2756 [2021-02-19 18:30:12,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1684 states. [2021-02-19 18:30:12,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1684 to 1489. [2021-02-19 18:30:12,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1489 states, 1488 states have (on average 2.02755376344086) internal successors, (3017), 1488 states have internal predecessors, (3017), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:12,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1489 states to 1489 states and 3017 transitions. [2021-02-19 18:30:12,084 INFO L78 Accepts]: Start accepts. Automaton has 1489 states and 3017 transitions. Word has length 33 [2021-02-19 18:30:12,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:12,084 INFO L480 AbstractCegarLoop]: Abstraction has 1489 states and 3017 transitions. [2021-02-19 18:30:12,084 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) [2021-02-19 18:30:12,084 INFO L276 IsEmpty]: Start isEmpty. Operand 1489 states and 3017 transitions. [2021-02-19 18:30:12,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:12,085 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:12,085 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:12,286 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2021-02-19 18:30:12,286 INFO L428 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:12,286 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:12,286 INFO L82 PathProgramCache]: Analyzing trace with hash -505133606, now seen corresponding path program 120 times [2021-02-19 18:30:12,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:12,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517699291] [2021-02-19 18:30:12,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:12,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:12,801 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:12,801 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517699291] [2021-02-19 18:30:12,802 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224543518] [2021-02-19 18:30:12,802 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 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 [2021-02-19 18:30:12,822 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:30:12,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:12,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:12,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:13,362 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:30:13,362 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:30:13,365 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:13,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:13,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:13,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:30:13,805 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:13,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:13,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:13,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101901462] [2021-02-19 18:30:13,806 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:13,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:13,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:13,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:13,806 INFO L87 Difference]: Start difference. First operand 1489 states and 3017 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) [2021-02-19 18:30:17,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:17,270 INFO L93 Difference]: Finished difference Result 1787 states and 3573 transitions. [2021-02-19 18:30:17,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:30:17,272 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 33 [2021-02-19 18:30:17,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:17,273 INFO L225 Difference]: With dead ends: 1787 [2021-02-19 18:30:17,273 INFO L226 Difference]: Without dead ends: 1743 [2021-02-19 18:30:17,274 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 927 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=305, Invalid=3235, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:30:17,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1743 states. [2021-02-19 18:30:17,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1743 to 1485. [2021-02-19 18:30:17,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1485 states, 1484 states have (on average 2.0256064690026956) internal successors, (3006), 1484 states have internal predecessors, (3006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:17,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1485 states to 1485 states and 3006 transitions. [2021-02-19 18:30:17,290 INFO L78 Accepts]: Start accepts. Automaton has 1485 states and 3006 transitions. Word has length 33 [2021-02-19 18:30:17,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:17,291 INFO L480 AbstractCegarLoop]: Abstraction has 1485 states and 3006 transitions. [2021-02-19 18:30:17,291 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) [2021-02-19 18:30:17,291 INFO L276 IsEmpty]: Start isEmpty. Operand 1485 states and 3006 transitions. [2021-02-19 18:30:17,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:17,292 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:17,292 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:17,508 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:17,508 INFO L428 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:17,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:17,509 INFO L82 PathProgramCache]: Analyzing trace with hash -1142849318, now seen corresponding path program 121 times [2021-02-19 18:30:17,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:17,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600242934] [2021-02-19 18:30:17,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:17,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:17,981 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:17,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600242934] [2021-02-19 18:30:17,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626816642] [2021-02-19 18:30:17,982 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 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 [2021-02-19 18:30:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:18,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:18,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:18,393 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:30:18,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:30:18,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:18,407 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:18,408 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:18,408 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:30:18,818 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:18,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:18,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:18,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438871512] [2021-02-19 18:30:18,819 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:18,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:18,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:18,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=900, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:18,819 INFO L87 Difference]: Start difference. First operand 1485 states and 3006 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) [2021-02-19 18:30:21,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:21,208 INFO L93 Difference]: Finished difference Result 1606 states and 3236 transitions. [2021-02-19 18:30:21,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-02-19 18:30:21,210 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 33 [2021-02-19 18:30:21,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:21,212 INFO L225 Difference]: With dead ends: 1606 [2021-02-19 18:30:21,212 INFO L226 Difference]: Without dead ends: 1578 [2021-02-19 18:30:21,212 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=209, Invalid=2143, Unknown=0, NotChecked=0, Total=2352 [2021-02-19 18:30:21,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1578 states. [2021-02-19 18:30:21,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1578 to 1477. [2021-02-19 18:30:21,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1477 states, 1476 states have (on average 2.0257452574525745) internal successors, (2990), 1476 states have internal predecessors, (2990), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:21,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1477 states to 1477 states and 2990 transitions. [2021-02-19 18:30:21,224 INFO L78 Accepts]: Start accepts. Automaton has 1477 states and 2990 transitions. Word has length 33 [2021-02-19 18:30:21,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:21,224 INFO L480 AbstractCegarLoop]: Abstraction has 1477 states and 2990 transitions. [2021-02-19 18:30:21,224 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) [2021-02-19 18:30:21,224 INFO L276 IsEmpty]: Start isEmpty. Operand 1477 states and 2990 transitions. [2021-02-19 18:30:21,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:21,225 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:21,225 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:21,426 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-02-19 18:30:21,426 INFO L428 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:21,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:21,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1333774488, now seen corresponding path program 122 times [2021-02-19 18:30:21,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:21,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795874451] [2021-02-19 18:30:21,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:21,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:21,975 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:21,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795874451] [2021-02-19 18:30:21,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1088592075] [2021-02-19 18:30:21,976 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 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 [2021-02-19 18:30:21,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:21,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:21,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:21,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:22,498 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:30:22,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:30:22,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:22,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:22,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:22,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:30:22,769 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:22,770 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:22,770 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:22,770 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952030393] [2021-02-19 18:30:22,770 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:22,770 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:22,770 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:22,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:22,771 INFO L87 Difference]: Start difference. First operand 1477 states and 2990 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) [2021-02-19 18:30:25,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:25,315 INFO L93 Difference]: Finished difference Result 1650 states and 3303 transitions. [2021-02-19 18:30:25,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:30:25,317 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 33 [2021-02-19 18:30:25,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:25,319 INFO L225 Difference]: With dead ends: 1650 [2021-02-19 18:30:25,319 INFO L226 Difference]: Without dead ends: 1554 [2021-02-19 18:30:25,319 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=295, Invalid=3127, Unknown=0, NotChecked=0, Total=3422 [2021-02-19 18:30:25,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1554 states. [2021-02-19 18:30:25,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1554 to 1494. [2021-02-19 18:30:25,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.026791694574682) internal successors, (3026), 1493 states have internal predecessors, (3026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:25,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3026 transitions. [2021-02-19 18:30:25,331 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3026 transitions. Word has length 33 [2021-02-19 18:30:25,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:25,332 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3026 transitions. [2021-02-19 18:30:25,332 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) [2021-02-19 18:30:25,332 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3026 transitions. [2021-02-19 18:30:25,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:25,333 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:25,333 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:25,533 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-02-19 18:30:25,534 INFO L428 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:25,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:25,534 INFO L82 PathProgramCache]: Analyzing trace with hash -1575570218, now seen corresponding path program 123 times [2021-02-19 18:30:25,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:25,534 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697197487] [2021-02-19 18:30:25,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:25,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:26,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:26,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697197487] [2021-02-19 18:30:26,023 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026508924] [2021-02-19 18:30:26,023 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 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 [2021-02-19 18:30:26,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:30:26,042 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:26,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:26,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:26,539 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:30:26,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:30:26,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:26,553 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:26,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:26,555 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:30:26,830 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:26,830 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:26,830 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:26,830 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977605307] [2021-02-19 18:30:26,830 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:26,830 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:26,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:26,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=896, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:26,831 INFO L87 Difference]: Start difference. First operand 1494 states and 3026 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) [2021-02-19 18:30:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:31,109 INFO L93 Difference]: Finished difference Result 1712 states and 3436 transitions. [2021-02-19 18:30:31,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:30:31,111 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 33 [2021-02-19 18:30:31,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:31,113 INFO L225 Difference]: With dead ends: 1712 [2021-02-19 18:30:31,113 INFO L226 Difference]: Without dead ends: 1617 [2021-02-19 18:30:31,114 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1242 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=386, Invalid=3904, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:30:31,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1617 states. [2021-02-19 18:30:31,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1617 to 1503. [2021-02-19 18:30:31,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1503 states, 1502 states have (on average 2.026631158455393) internal successors, (3044), 1502 states have internal predecessors, (3044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:31,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1503 states to 1503 states and 3044 transitions. [2021-02-19 18:30:31,126 INFO L78 Accepts]: Start accepts. Automaton has 1503 states and 3044 transitions. Word has length 33 [2021-02-19 18:30:31,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:31,126 INFO L480 AbstractCegarLoop]: Abstraction has 1503 states and 3044 transitions. [2021-02-19 18:30:31,126 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) [2021-02-19 18:30:31,127 INFO L276 IsEmpty]: Start isEmpty. Operand 1503 states and 3044 transitions. [2021-02-19 18:30:31,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:31,128 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:31,128 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:31,330 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-02-19 18:30:31,330 INFO L428 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:31,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:31,331 INFO L82 PathProgramCache]: Analyzing trace with hash 2078286488, now seen corresponding path program 124 times [2021-02-19 18:30:31,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:31,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136033359] [2021-02-19 18:30:31,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:31,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:31,871 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:31,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136033359] [2021-02-19 18:30:31,872 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942537720] [2021-02-19 18:30:31,872 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 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 [2021-02-19 18:30:31,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:30:31,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:31,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:31,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:32,396 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:30:32,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:30:32,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:32,413 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:32,415 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:32,415 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:30:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:32,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:32,752 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:32,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232671923] [2021-02-19 18:30:32,753 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:32,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:32,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:32,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:32,754 INFO L87 Difference]: Start difference. First operand 1503 states and 3044 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) [2021-02-19 18:30:37,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:37,297 INFO L93 Difference]: Finished difference Result 1736 states and 3481 transitions. [2021-02-19 18:30:37,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:30:37,299 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 33 [2021-02-19 18:30:37,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:37,301 INFO L225 Difference]: With dead ends: 1736 [2021-02-19 18:30:37,301 INFO L226 Difference]: Without dead ends: 1656 [2021-02-19 18:30:37,302 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1455 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=540, Invalid=4430, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:30:37,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1656 states. [2021-02-19 18:30:37,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1656 to 1499. [2021-02-19 18:30:37,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0246995994659547) internal successors, (3033), 1498 states have internal predecessors, (3033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:37,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3033 transitions. [2021-02-19 18:30:37,315 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3033 transitions. Word has length 33 [2021-02-19 18:30:37,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:37,315 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 3033 transitions. [2021-02-19 18:30:37,315 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) [2021-02-19 18:30:37,315 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3033 transitions. [2021-02-19 18:30:37,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:37,317 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:37,317 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:37,525 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:37,526 INFO L428 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:37,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:37,526 INFO L82 PathProgramCache]: Analyzing trace with hash -790438442, now seen corresponding path program 125 times [2021-02-19 18:30:37,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:37,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082864731] [2021-02-19 18:30:37,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:37,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:38,126 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:38,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082864731] [2021-02-19 18:30:38,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778946888] [2021-02-19 18:30:38,127 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 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 [2021-02-19 18:30:38,150 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:30:38,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:38,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:30:38,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:38,618 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:30:38,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:30:38,620 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:38,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:38,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:38,634 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:30:38,950 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:38,951 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:38,951 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:38,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617247029] [2021-02-19 18:30:38,951 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:38,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:38,951 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:38,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:38,952 INFO L87 Difference]: Start difference. First operand 1499 states and 3033 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) [2021-02-19 18:30:44,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:44,302 INFO L93 Difference]: Finished difference Result 1806 states and 3621 transitions. [2021-02-19 18:30:44,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:30:44,304 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 33 [2021-02-19 18:30:44,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:44,305 INFO L225 Difference]: With dead ends: 1806 [2021-02-19 18:30:44,305 INFO L226 Difference]: Without dead ends: 1747 [2021-02-19 18:30:44,306 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1576 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=562, Invalid=4840, Unknown=0, NotChecked=0, Total=5402 [2021-02-19 18:30:44,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1747 states. [2021-02-19 18:30:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1747 to 1494. [2021-02-19 18:30:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-02-19 18:30:44,318 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-02-19 18:30:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:44,319 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-02-19 18:30:44,319 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) [2021-02-19 18:30:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-02-19 18:30:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:44,320 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:44,320 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:44,520 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:44,521 INFO L428 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:44,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:44,521 INFO L82 PathProgramCache]: Analyzing trace with hash -1705071188, now seen corresponding path program 126 times [2021-02-19 18:30:44,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:44,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967858737] [2021-02-19 18:30:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:44,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:45,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967858737] [2021-02-19 18:30:45,043 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391002934] [2021-02-19 18:30:45,043 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:45,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:30:45,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:45,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 36 conjunts are in the unsatisfiable core [2021-02-19 18:30:45,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:45,478 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:30:45,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:30:45,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:45,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:45,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:45,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:16 [2021-02-19 18:30:45,929 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:45,930 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:45,930 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:45,930 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726882121] [2021-02-19 18:30:45,930 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:45,930 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:45,930 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:45,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=897, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:45,931 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 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) [2021-02-19 18:30:50,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:50,050 INFO L93 Difference]: Finished difference Result 1678 states and 3369 transitions. [2021-02-19 18:30:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:30:50,052 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 33 [2021-02-19 18:30:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:50,053 INFO L225 Difference]: With dead ends: 1678 [2021-02-19 18:30:50,053 INFO L226 Difference]: Without dead ends: 1619 [2021-02-19 18:30:50,054 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1208 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=416, Invalid=4006, Unknown=0, NotChecked=0, Total=4422 [2021-02-19 18:30:50,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1619 states. [2021-02-19 18:30:50,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1619 to 1494. [2021-02-19 18:30:50,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.0247823174815807) internal successors, (3023), 1493 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:50,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3023 transitions. [2021-02-19 18:30:50,068 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3023 transitions. Word has length 33 [2021-02-19 18:30:50,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:50,068 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3023 transitions. [2021-02-19 18:30:50,068 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) [2021-02-19 18:30:50,068 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3023 transitions. [2021-02-19 18:30:50,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:50,070 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:50,070 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:50,291 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:50,291 INFO L428 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:50,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:50,292 INFO L82 PathProgramCache]: Analyzing trace with hash 1006459594, now seen corresponding path program 127 times [2021-02-19 18:30:50,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:50,292 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394555815] [2021-02-19 18:30:50,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:50,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:50,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394555815] [2021-02-19 18:30:50,870 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872762177] [2021-02-19 18:30:50,870 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:50,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:50,890 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:51,445 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:30:51,446 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:30:51,448 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:51,461 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:51,462 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:51,462 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:30:51,747 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:51,747 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:51,747 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:51,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801377635] [2021-02-19 18:30:51,747 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:51,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:51,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:51,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:51,748 INFO L87 Difference]: Start difference. First operand 1494 states and 3023 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) [2021-02-19 18:30:55,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:30:55,212 INFO L93 Difference]: Finished difference Result 1719 states and 3443 transitions. [2021-02-19 18:30:55,214 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-02-19 18:30:55,214 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 33 [2021-02-19 18:30:55,214 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:30:55,216 INFO L225 Difference]: With dead ends: 1719 [2021-02-19 18:30:55,216 INFO L226 Difference]: Without dead ends: 1623 [2021-02-19 18:30:55,217 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=293, Invalid=3013, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:30:55,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1623 states. [2021-02-19 18:30:55,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1623 to 1538. [2021-02-19 18:30:55,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1538 states, 1537 states have (on average 2.0286271958360445) internal successors, (3118), 1537 states have internal predecessors, (3118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:30:55,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1538 states to 1538 states and 3118 transitions. [2021-02-19 18:30:55,229 INFO L78 Accepts]: Start accepts. Automaton has 1538 states and 3118 transitions. Word has length 33 [2021-02-19 18:30:55,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:30:55,230 INFO L480 AbstractCegarLoop]: Abstraction has 1538 states and 3118 transitions. [2021-02-19 18:30:55,230 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) [2021-02-19 18:30:55,230 INFO L276 IsEmpty]: Start isEmpty. Operand 1538 states and 3118 transitions. [2021-02-19 18:30:55,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:30:55,231 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:30:55,231 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:30:55,431 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2021-02-19 18:30:55,431 INFO L428 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:30:55,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:30:55,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1902885112, now seen corresponding path program 128 times [2021-02-19 18:30:55,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:30:55,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731680239] [2021-02-19 18:30:55,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:30:55,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:30:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:55,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731680239] [2021-02-19 18:30:55,967 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571232411] [2021-02-19 18:30:55,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:30:55,993 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:30:55,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:30:55,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:30:55,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:30:56,512 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:30:56,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:30:56,516 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:30:56,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:30:56,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:30:56,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:30:56,800 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:30:56,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:30:56,801 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:30:56,801 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063790522] [2021-02-19 18:30:56,801 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:30:56,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:30:56,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:30:56,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=893, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:30:56,801 INFO L87 Difference]: Start difference. First operand 1538 states and 3118 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) [2021-02-19 18:31:01,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:01,529 INFO L93 Difference]: Finished difference Result 1837 states and 3695 transitions. [2021-02-19 18:31:01,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-02-19 18:31:01,530 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 33 [2021-02-19 18:31:01,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:01,532 INFO L225 Difference]: With dead ends: 1837 [2021-02-19 18:31:01,532 INFO L226 Difference]: Without dead ends: 1735 [2021-02-19 18:31:01,533 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1500 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=453, Invalid=4517, Unknown=0, NotChecked=0, Total=4970 [2021-02-19 18:31:01,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1735 states. [2021-02-19 18:31:01,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1735 to 1580. [2021-02-19 18:31:01,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1580 states, 1579 states have (on average 2.031665611146295) internal successors, (3208), 1579 states have internal predecessors, (3208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:01,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1580 states to 1580 states and 3208 transitions. [2021-02-19 18:31:01,545 INFO L78 Accepts]: Start accepts. Automaton has 1580 states and 3208 transitions. Word has length 33 [2021-02-19 18:31:01,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:01,545 INFO L480 AbstractCegarLoop]: Abstraction has 1580 states and 3208 transitions. [2021-02-19 18:31:01,546 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) [2021-02-19 18:31:01,546 INFO L276 IsEmpty]: Start isEmpty. Operand 1580 states and 3208 transitions. [2021-02-19 18:31:01,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:31:01,547 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:01,547 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:01,748 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:01,748 INFO L428 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:01,749 INFO L82 PathProgramCache]: Analyzing trace with hash 1750971594, now seen corresponding path program 129 times [2021-02-19 18:31:01,749 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:01,749 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884901569] [2021-02-19 18:31:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:01,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:02,393 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:02,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884901569] [2021-02-19 18:31:02,393 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597041799] [2021-02-19 18:31:02,393 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:02,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:31:02,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:02,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:31:02,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:02,925 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:31:02,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:31:02,928 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:02,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:02,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:02,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:31:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:03,292 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:03,292 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:31:03,292 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116719779] [2021-02-19 18:31:03,292 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:31:03,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:03,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:31:03,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=886, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:31:03,292 INFO L87 Difference]: Start difference. First operand 1580 states and 3208 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) [2021-02-19 18:31:09,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:09,866 INFO L93 Difference]: Finished difference Result 1994 states and 4027 transitions. [2021-02-19 18:31:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 18:31:09,869 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 33 [2021-02-19 18:31:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:09,871 INFO L225 Difference]: With dead ends: 1994 [2021-02-19 18:31:09,871 INFO L226 Difference]: Without dead ends: 1895 [2021-02-19 18:31:09,872 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2533 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=766, Invalid=7066, Unknown=0, NotChecked=0, Total=7832 [2021-02-19 18:31:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1895 states. [2021-02-19 18:31:09,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1895 to 1605. [2021-02-19 18:31:09,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1605 states, 1604 states have (on average 2.0311720698254363) internal successors, (3258), 1604 states have internal predecessors, (3258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:09,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1605 states to 1605 states and 3258 transitions. [2021-02-19 18:31:09,887 INFO L78 Accepts]: Start accepts. Automaton has 1605 states and 3258 transitions. Word has length 33 [2021-02-19 18:31:09,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:09,887 INFO L480 AbstractCegarLoop]: Abstraction has 1605 states and 3258 transitions. [2021-02-19 18:31:09,887 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) [2021-02-19 18:31:09,887 INFO L276 IsEmpty]: Start isEmpty. Operand 1605 states and 3258 transitions. [2021-02-19 18:31:09,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:31:09,888 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:09,888 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:10,089 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-02-19 18:31:10,089 INFO L428 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:10,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:10,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1117753336, now seen corresponding path program 130 times [2021-02-19 18:31:10,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:10,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26408995] [2021-02-19 18:31:10,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:10,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:10,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26408995] [2021-02-19 18:31:10,719 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480222658] [2021-02-19 18:31:10,719 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 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:10,738 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:31:10,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:10,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:31:10,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:11,265 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:31:11,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:31:11,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:11,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:11,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:11,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:31:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:11,698 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:11,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:31:11,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329825138] [2021-02-19 18:31:11,698 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:31:11,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:11,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:31:11,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:31:11,698 INFO L87 Difference]: Start difference. First operand 1605 states and 3258 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) [2021-02-19 18:31:19,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:19,361 INFO L93 Difference]: Finished difference Result 2110 states and 4259 transitions. [2021-02-19 18:31:19,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 18:31:19,363 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 33 [2021-02-19 18:31:19,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:19,366 INFO L225 Difference]: With dead ends: 2110 [2021-02-19 18:31:19,366 INFO L226 Difference]: Without dead ends: 2048 [2021-02-19 18:31:19,366 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2780 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=807, Invalid=7749, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 18:31:19,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2048 states. [2021-02-19 18:31:19,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2048 to 1696. [2021-02-19 18:31:19,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1696 states, 1695 states have (on average 2.033628318584071) internal successors, (3447), 1695 states have internal predecessors, (3447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:19,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1696 states to 1696 states and 3447 transitions. [2021-02-19 18:31:19,381 INFO L78 Accepts]: Start accepts. Automaton has 1696 states and 3447 transitions. Word has length 33 [2021-02-19 18:31:19,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:19,381 INFO L480 AbstractCegarLoop]: Abstraction has 1696 states and 3447 transitions. [2021-02-19 18:31:19,381 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) [2021-02-19 18:31:19,381 INFO L276 IsEmpty]: Start isEmpty. Operand 1696 states and 3447 transitions. [2021-02-19 18:31:19,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:31:19,382 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:19,382 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:19,582 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:19,583 INFO L428 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:19,583 INFO L82 PathProgramCache]: Analyzing trace with hash -2032386082, now seen corresponding path program 131 times [2021-02-19 18:31:19,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:19,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220122777] [2021-02-19 18:31:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:19,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:20,197 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:20,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220122777] [2021-02-19 18:31:20,197 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016239400] [2021-02-19 18:31:20,197 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 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:20,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:31:20,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:20,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:31:20,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:20,697 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:31:20,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:31:20,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:20,714 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:20,715 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:20,716 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:31:21,096 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:21,097 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:21,097 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:31:21,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907318943] [2021-02-19 18:31:21,097 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:31:21,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:21,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:31:21,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=894, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:31:21,097 INFO L87 Difference]: Start difference. First operand 1696 states and 3447 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) [2021-02-19 18:31:25,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:25,588 INFO L93 Difference]: Finished difference Result 1992 states and 4011 transitions. [2021-02-19 18:31:25,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-02-19 18:31:25,590 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 33 [2021-02-19 18:31:25,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:25,592 INFO L225 Difference]: With dead ends: 1992 [2021-02-19 18:31:25,592 INFO L226 Difference]: Without dead ends: 1936 [2021-02-19 18:31:25,593 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=417, Invalid=3873, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:31:25,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1936 states. [2021-02-19 18:31:25,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1936 to 1752. [2021-02-19 18:31:25,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1752 states, 1751 states have (on average 2.031410622501428) internal successors, (3557), 1751 states have internal predecessors, (3557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1752 states to 1752 states and 3557 transitions. [2021-02-19 18:31:25,609 INFO L78 Accepts]: Start accepts. Automaton has 1752 states and 3557 transitions. Word has length 33 [2021-02-19 18:31:25,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:25,609 INFO L480 AbstractCegarLoop]: Abstraction has 1752 states and 3557 transitions. [2021-02-19 18:31:25,609 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) [2021-02-19 18:31:25,609 INFO L276 IsEmpty]: Start isEmpty. Operand 1752 states and 3557 transitions. [2021-02-19 18:31:25,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:31:25,611 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:25,611 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:25,833 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:25,833 INFO L428 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:25,833 INFO L82 PathProgramCache]: Analyzing trace with hash -2028969804, now seen corresponding path program 132 times [2021-02-19 18:31:25,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:25,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111157714] [2021-02-19 18:31:25,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:25,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:26,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111157714] [2021-02-19 18:31:26,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218659162] [2021-02-19 18:31:26,484 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:26,503 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:31:26,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:26,504 WARN L261 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 38 conjunts are in the unsatisfiable core [2021-02-19 18:31:26,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:27,236 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:31:27,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:31:27,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:27,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:27,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:27,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:42, output treesize:16 [2021-02-19 18:31:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:27,555 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:27,555 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 33 [2021-02-19 18:31:27,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667430133] [2021-02-19 18:31:27,556 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:31:27,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:27,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:31:27,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=1007, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:31:27,556 INFO L87 Difference]: Start difference. First operand 1752 states and 3557 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) [2021-02-19 18:31:33,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:33,282 INFO L93 Difference]: Finished difference Result 2256 states and 4557 transitions. [2021-02-19 18:31:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-02-19 18:31:33,284 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 33 [2021-02-19 18:31:33,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:33,286 INFO L225 Difference]: With dead ends: 2256 [2021-02-19 18:31:33,286 INFO L226 Difference]: Without dead ends: 2168 [2021-02-19 18:31:33,287 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1942 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=525, Invalid=5481, Unknown=0, NotChecked=0, Total=6006 [2021-02-19 18:31:33,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2168 states. [2021-02-19 18:31:33,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2168 to 1988. [2021-02-19 18:31:33,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1988 states, 1987 states have (on average 2.030699547055863) internal successors, (4035), 1987 states have internal predecessors, (4035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:33,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1988 states to 1988 states and 4035 transitions. [2021-02-19 18:31:33,306 INFO L78 Accepts]: Start accepts. Automaton has 1988 states and 4035 transitions. Word has length 33 [2021-02-19 18:31:33,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:33,306 INFO L480 AbstractCegarLoop]: Abstraction has 1988 states and 4035 transitions. [2021-02-19 18:31:33,306 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) [2021-02-19 18:31:33,306 INFO L276 IsEmpty]: Start isEmpty. Operand 1988 states and 4035 transitions. [2021-02-19 18:31:33,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:31:33,308 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:33,308 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:33,509 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:33,509 INFO L428 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:33,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:33,509 INFO L82 PathProgramCache]: Analyzing trace with hash 1624886902, now seen corresponding path program 133 times [2021-02-19 18:31:33,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:33,509 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532296948] [2021-02-19 18:31:33,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:34,170 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:34,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532296948] [2021-02-19 18:31:34,170 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1418284148] [2021-02-19 18:31:34,170 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 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:34,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:34,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:31:34,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:34,704 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:31:34,704 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:31:34,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:34,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:34,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:34,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:31:35,080 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:35,081 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:35,081 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:31:35,081 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051526456] [2021-02-19 18:31:35,081 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:31:35,081 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:35,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:31:35,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:31:35,082 INFO L87 Difference]: Start difference. First operand 1988 states and 4035 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) [2021-02-19 18:31:41,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:41,681 INFO L93 Difference]: Finished difference Result 2485 states and 5053 transitions. [2021-02-19 18:31:41,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-02-19 18:31:41,684 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 33 [2021-02-19 18:31:41,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:41,687 INFO L225 Difference]: With dead ends: 2485 [2021-02-19 18:31:41,687 INFO L226 Difference]: Without dead ends: 2405 [2021-02-19 18:31:41,688 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2482 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=672, Invalid=6984, Unknown=0, NotChecked=0, Total=7656 [2021-02-19 18:31:41,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2405 states. [2021-02-19 18:31:41,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2405 to 1662. [2021-02-19 18:31:41,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1662 states, 1661 states have (on average 2.033112582781457) internal successors, (3377), 1661 states have internal predecessors, (3377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:41,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1662 states to 1662 states and 3377 transitions. [2021-02-19 18:31:41,705 INFO L78 Accepts]: Start accepts. Automaton has 1662 states and 3377 transitions. Word has length 33 [2021-02-19 18:31:41,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:41,705 INFO L480 AbstractCegarLoop]: Abstraction has 1662 states and 3377 transitions. [2021-02-19 18:31:41,705 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) [2021-02-19 18:31:41,705 INFO L276 IsEmpty]: Start isEmpty. Operand 1662 states and 3377 transitions. [2021-02-19 18:31:41,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:31:41,707 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:41,708 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:41,922 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-02-19 18:31:41,922 INFO L428 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:41,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:41,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1243838028, now seen corresponding path program 134 times [2021-02-19 18:31:41,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:41,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582991326] [2021-02-19 18:31:41,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:41,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:42,810 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:42,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582991326] [2021-02-19 18:31:42,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559229309] [2021-02-19 18:31:42,810 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 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:42,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:31:42,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:42,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:31:42,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:43,393 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:31:43,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:31:43,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:43,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:43,413 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:43,414 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:31:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:43,822 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:43,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:31:43,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188370734] [2021-02-19 18:31:43,823 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:31:43,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:43,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:31:43,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:31:43,823 INFO L87 Difference]: Start difference. First operand 1662 states and 3377 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) [2021-02-19 18:31:51,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:51,694 INFO L93 Difference]: Finished difference Result 2226 states and 4483 transitions. [2021-02-19 18:31:51,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-02-19 18:31:51,696 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 33 [2021-02-19 18:31:51,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:51,699 INFO L225 Difference]: With dead ends: 2226 [2021-02-19 18:31:51,699 INFO L226 Difference]: Without dead ends: 2170 [2021-02-19 18:31:51,699 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2802 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=763, Invalid=7793, Unknown=0, NotChecked=0, Total=8556 [2021-02-19 18:31:51,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2170 states. [2021-02-19 18:31:51,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2170 to 1536. [2021-02-19 18:31:51,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1536 states, 1535 states have (on average 2.0273615635179154) internal successors, (3112), 1535 states have internal predecessors, (3112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:51,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1536 states to 1536 states and 3112 transitions. [2021-02-19 18:31:51,713 INFO L78 Accepts]: Start accepts. Automaton has 1536 states and 3112 transitions. Word has length 33 [2021-02-19 18:31:51,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:51,713 INFO L480 AbstractCegarLoop]: Abstraction has 1536 states and 3112 transitions. [2021-02-19 18:31:51,713 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) [2021-02-19 18:31:51,713 INFO L276 IsEmpty]: Start isEmpty. Operand 1536 states and 3112 transitions. [2021-02-19 18:31:51,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:31:51,714 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:51,714 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:51,915 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:51,915 INFO L428 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:51,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:51,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1348684646, now seen corresponding path program 135 times [2021-02-19 18:31:51,915 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:51,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471808262] [2021-02-19 18:31:51,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:51,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:52,614 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:52,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471808262] [2021-02-19 18:31:52,615 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306434095] [2021-02-19 18:31:52,615 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 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:31:52,633 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:31:52,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:31:52,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:31:52,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:31:53,135 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:31:53,135 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:31:53,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:31:53,154 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:31:53,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:31:53,155 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:31:53,607 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:53,607 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:31:53,607 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:31:53,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500803579] [2021-02-19 18:31:53,607 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:31:53,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:31:53,608 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:31:53,608 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=891, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:31:53,608 INFO L87 Difference]: Start difference. First operand 1536 states and 3112 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) [2021-02-19 18:31:59,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:31:59,082 INFO L93 Difference]: Finished difference Result 2035 states and 4093 transitions. [2021-02-19 18:31:59,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-02-19 18:31:59,084 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 33 [2021-02-19 18:31:59,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:31:59,086 INFO L225 Difference]: With dead ends: 2035 [2021-02-19 18:31:59,086 INFO L226 Difference]: Without dead ends: 1979 [2021-02-19 18:31:59,086 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1323 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=466, Invalid=4226, Unknown=0, NotChecked=0, Total=4692 [2021-02-19 18:31:59,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1979 states. [2021-02-19 18:31:59,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1979 to 1471. [2021-02-19 18:31:59,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1471 states, 1470 states have (on average 2.0258503401360546) internal successors, (2978), 1470 states have internal predecessors, (2978), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:31:59,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1471 states to 1471 states and 2978 transitions. [2021-02-19 18:31:59,099 INFO L78 Accepts]: Start accepts. Automaton has 1471 states and 2978 transitions. Word has length 33 [2021-02-19 18:31:59,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:31:59,099 INFO L480 AbstractCegarLoop]: Abstraction has 1471 states and 2978 transitions. [2021-02-19 18:31:59,099 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) [2021-02-19 18:31:59,099 INFO L276 IsEmpty]: Start isEmpty. Operand 1471 states and 2978 transitions. [2021-02-19 18:31:59,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:31:59,100 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:31:59,100 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:31:59,300 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-02-19 18:31:59,300 INFO L428 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:31:59,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:31:59,301 INFO L82 PathProgramCache]: Analyzing trace with hash 9643872, now seen corresponding path program 136 times [2021-02-19 18:31:59,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:31:59,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390700967] [2021-02-19 18:31:59,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:31:59,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:31:59,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:31:59,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390700967] [2021-02-19 18:31:59,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492690188] [2021-02-19 18:31:59,995 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 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:00,014 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:32:00,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:00,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:32:00,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:00,738 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:32:00,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:32:00,741 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:00,758 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:00,759 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:00,759 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:32:01,116 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:01,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:01,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:32:01,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66470254] [2021-02-19 18:32:01,116 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:32:01,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:01,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:32:01,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:32:01,117 INFO L87 Difference]: Start difference. First operand 1471 states and 2978 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) [2021-02-19 18:32:04,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:04,496 INFO L93 Difference]: Finished difference Result 1668 states and 3337 transitions. [2021-02-19 18:32:04,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:32:04,498 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 33 [2021-02-19 18:32:04,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:04,500 INFO L225 Difference]: With dead ends: 1668 [2021-02-19 18:32:04,500 INFO L226 Difference]: Without dead ends: 1572 [2021-02-19 18:32:04,500 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=296, Invalid=2896, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:32:04,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1572 states. [2021-02-19 18:32:04,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1572 to 1496. [2021-02-19 18:32:04,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1496 states, 1495 states have (on average 2.025418060200669) internal successors, (3028), 1495 states have internal predecessors, (3028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:04,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1496 states to 1496 states and 3028 transitions. [2021-02-19 18:32:04,517 INFO L78 Accepts]: Start accepts. Automaton has 1496 states and 3028 transitions. Word has length 33 [2021-02-19 18:32:04,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:04,517 INFO L480 AbstractCegarLoop]: Abstraction has 1496 states and 3028 transitions. [2021-02-19 18:32:04,517 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) [2021-02-19 18:32:04,517 INFO L276 IsEmpty]: Start isEmpty. Operand 1496 states and 3028 transitions. [2021-02-19 18:32:04,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:32:04,518 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:04,518 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:04,732 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:04,732 INFO L428 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:04,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:04,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1395266462, now seen corresponding path program 137 times [2021-02-19 18:32:04,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:04,733 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835102338] [2021-02-19 18:32:04,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:05,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835102338] [2021-02-19 18:32:05,493 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1832494432] [2021-02-19 18:32:05,493 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:05,512 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:32:05,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:05,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 32 conjunts are in the unsatisfiable core [2021-02-19 18:32:05,514 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:06,165 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:32:06,165 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:32:06,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:06,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:06,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:06,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:32:06,505 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:06,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:06,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:32:06,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775493540] [2021-02-19 18:32:06,506 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:32:06,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:06,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:32:06,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:32:06,507 INFO L87 Difference]: Start difference. First operand 1496 states and 3028 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) [2021-02-19 18:32:09,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:09,900 INFO L93 Difference]: Finished difference Result 1683 states and 3373 transitions. [2021-02-19 18:32:09,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-02-19 18:32:09,902 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 33 [2021-02-19 18:32:09,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:09,904 INFO L225 Difference]: With dead ends: 1683 [2021-02-19 18:32:09,904 INFO L226 Difference]: Without dead ends: 1595 [2021-02-19 18:32:09,904 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=300, Invalid=2892, Unknown=0, NotChecked=0, Total=3192 [2021-02-19 18:32:09,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1595 states. [2021-02-19 18:32:09,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1595 to 1499. [2021-02-19 18:32:09,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1499 states, 1498 states have (on average 2.0253671562082776) internal successors, (3034), 1498 states have internal predecessors, (3034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:09,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1499 states to 1499 states and 3034 transitions. [2021-02-19 18:32:09,917 INFO L78 Accepts]: Start accepts. Automaton has 1499 states and 3034 transitions. Word has length 33 [2021-02-19 18:32:09,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:09,917 INFO L480 AbstractCegarLoop]: Abstraction has 1499 states and 3034 transitions. [2021-02-19 18:32:09,917 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) [2021-02-19 18:32:09,917 INFO L276 IsEmpty]: Start isEmpty. Operand 1499 states and 3034 transitions. [2021-02-19 18:32:09,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:32:09,918 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:09,918 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:10,118 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:10,118 INFO L428 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:10,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:10,119 INFO L82 PathProgramCache]: Analyzing trace with hash 754155872, now seen corresponding path program 138 times [2021-02-19 18:32:10,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:10,119 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763371113] [2021-02-19 18:32:10,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:10,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:10,845 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763371113] [2021-02-19 18:32:10,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388201950] [2021-02-19 18:32:10,845 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:10,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-02-19 18:32:10,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:10,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:32:10,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:11,453 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:32:11,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:32:11,456 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:11,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:11,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:11,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:32:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:11,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:11,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:32:11,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626411352] [2021-02-19 18:32:11,907 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:32:11,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:11,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:32:11,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=880, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:32:11,907 INFO L87 Difference]: Start difference. First operand 1499 states and 3034 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) [2021-02-19 18:32:16,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:16,580 INFO L93 Difference]: Finished difference Result 1771 states and 3554 transitions. [2021-02-19 18:32:16,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-02-19 18:32:16,583 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 33 [2021-02-19 18:32:16,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:16,585 INFO L225 Difference]: With dead ends: 1771 [2021-02-19 18:32:16,585 INFO L226 Difference]: Without dead ends: 1675 [2021-02-19 18:32:16,585 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1601 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=507, Invalid=4605, Unknown=0, NotChecked=0, Total=5112 [2021-02-19 18:32:16,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1675 states. [2021-02-19 18:32:16,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1675 to 1504. [2021-02-19 18:32:16,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1504 states, 1503 states have (on average 2.0246174318030605) internal successors, (3043), 1503 states have internal predecessors, (3043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:16,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1504 states to 1504 states and 3043 transitions. [2021-02-19 18:32:16,597 INFO L78 Accepts]: Start accepts. Automaton has 1504 states and 3043 transitions. Word has length 33 [2021-02-19 18:32:16,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:16,598 INFO L480 AbstractCegarLoop]: Abstraction has 1504 states and 3043 transitions. [2021-02-19 18:32:16,598 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) [2021-02-19 18:32:16,598 INFO L276 IsEmpty]: Start isEmpty. Operand 1504 states and 3043 transitions. [2021-02-19 18:32:16,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:32:16,599 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:16,599 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:16,799 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:16,799 INFO L428 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:16,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:16,800 INFO L82 PathProgramCache]: Analyzing trace with hash -2114569058, now seen corresponding path program 139 times [2021-02-19 18:32:16,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:16,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849947457] [2021-02-19 18:32:16,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:16,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:17,533 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:17,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849947457] [2021-02-19 18:32:17,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [949793295] [2021-02-19 18:32:17,533 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:17,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:32:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:18,131 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:32:18,132 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:32:18,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:18,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:18,157 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:18,157 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:32:18,587 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:18,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:18,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:32:18,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117401877] [2021-02-19 18:32:18,587 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:32:18,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:18,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:32:18,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=881, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:32:18,588 INFO L87 Difference]: Start difference. First operand 1504 states and 3043 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) [2021-02-19 18:32:22,889 WARN L202 SmtUtils]: Spent 101.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 22 [2021-02-19 18:32:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:25,622 INFO L93 Difference]: Finished difference Result 1940 states and 3886 transitions. [2021-02-19 18:32:25,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-02-19 18:32:25,624 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 33 [2021-02-19 18:32:25,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:25,626 INFO L225 Difference]: With dead ends: 1940 [2021-02-19 18:32:25,626 INFO L226 Difference]: Without dead ends: 1862 [2021-02-19 18:32:25,626 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2334 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=695, Invalid=6445, Unknown=0, NotChecked=0, Total=7140 [2021-02-19 18:32:25,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1862 states. [2021-02-19 18:32:25,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1862 to 1495. [2021-02-19 18:32:25,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0234270414993305) internal successors, (3023), 1494 states have internal predecessors, (3023), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:25,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3023 transitions. [2021-02-19 18:32:25,638 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3023 transitions. Word has length 33 [2021-02-19 18:32:25,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:25,638 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3023 transitions. [2021-02-19 18:32:25,638 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) [2021-02-19 18:32:25,638 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3023 transitions. [2021-02-19 18:32:25,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:32:25,639 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:25,639 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:25,840 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-02-19 18:32:25,840 INFO L428 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:25,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:25,840 INFO L82 PathProgramCache]: Analyzing trace with hash 1265765492, now seen corresponding path program 140 times [2021-02-19 18:32:25,840 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:25,840 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324503993] [2021-02-19 18:32:25,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:25,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:26,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:26,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324503993] [2021-02-19 18:32:26,499 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682859965] [2021-02-19 18:32:26,499 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:26,530 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:32:26,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:26,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:32:26,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:27,043 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:32:27,043 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:32:27,046 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:27,062 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:27,063 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:27,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:32:27,529 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:27,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:27,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 16] total 31 [2021-02-19 18:32:27,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668979695] [2021-02-19 18:32:27,529 INFO L460 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-02-19 18:32:27,529 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:27,529 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-02-19 18:32:27,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=888, Unknown=0, NotChecked=0, Total=992 [2021-02-19 18:32:27,530 INFO L87 Difference]: Start difference. First operand 1495 states and 3023 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) [2021-02-19 18:32:33,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:33,262 INFO L93 Difference]: Finished difference Result 1704 states and 3411 transitions. [2021-02-19 18:32:33,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:32:33,265 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 33 [2021-02-19 18:32:33,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:33,266 INFO L225 Difference]: With dead ends: 1704 [2021-02-19 18:32:33,266 INFO L226 Difference]: Without dead ends: 1642 [2021-02-19 18:32:33,267 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1575 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=515, Invalid=4741, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:32:33,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-02-19 18:32:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1472. [2021-02-19 18:32:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1472 states, 1471 states have (on average 2.025832766825289) internal successors, (2980), 1471 states have internal predecessors, (2980), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:33,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1472 states to 1472 states and 2980 transitions. [2021-02-19 18:32:33,278 INFO L78 Accepts]: Start accepts. Automaton has 1472 states and 2980 transitions. Word has length 33 [2021-02-19 18:32:33,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:33,278 INFO L480 AbstractCegarLoop]: Abstraction has 1472 states and 2980 transitions. [2021-02-19 18:32:33,278 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) [2021-02-19 18:32:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 1472 states and 2980 transitions. [2021-02-19 18:32:33,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:32:33,279 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:33,279 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:33,480 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-02-19 18:32:33,480 INFO L428 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:33,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:33,480 INFO L82 PathProgramCache]: Analyzing trace with hash 1761944154, now seen corresponding path program 141 times [2021-02-19 18:32:33,480 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:33,480 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751849117] [2021-02-19 18:32:33,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:33,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:34,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751849117] [2021-02-19 18:32:34,148 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41535070] [2021-02-19 18:32:34,148 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:34,166 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-02-19 18:32:34,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:34,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:32:34,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:34,824 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:32:34,824 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:32:34,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:34,844 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:34,845 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:34,845 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:32:35,178 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:35,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:35,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-02-19 18:32:35,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675728074] [2021-02-19 18:32:35,178 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:32:35,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:35,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:32:35,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=834, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:32:35,179 INFO L87 Difference]: Start difference. First operand 1472 states and 2980 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-02-19 18:32:39,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:39,661 INFO L93 Difference]: Finished difference Result 1656 states and 3314 transitions. [2021-02-19 18:32:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-02-19 18:32:39,663 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 33 [2021-02-19 18:32:39,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:39,665 INFO L225 Difference]: With dead ends: 1656 [2021-02-19 18:32:39,665 INFO L226 Difference]: Without dead ends: 1568 [2021-02-19 18:32:39,666 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 990 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=332, Invalid=3208, Unknown=0, NotChecked=0, Total=3540 [2021-02-19 18:32:39,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1568 states. [2021-02-19 18:32:39,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1568 to 1494. [2021-02-19 18:32:39,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1494 states, 1493 states have (on average 2.024112525117214) internal successors, (3022), 1493 states have internal predecessors, (3022), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:39,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1494 states to 1494 states and 3022 transitions. [2021-02-19 18:32:39,677 INFO L78 Accepts]: Start accepts. Automaton has 1494 states and 3022 transitions. Word has length 33 [2021-02-19 18:32:39,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:39,677 INFO L480 AbstractCegarLoop]: Abstraction has 1494 states and 3022 transitions. [2021-02-19 18:32:39,677 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-02-19 18:32:39,677 INFO L276 IsEmpty]: Start isEmpty. Operand 1494 states and 3022 transitions. [2021-02-19 18:32:39,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:32:39,678 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:39,678 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:39,878 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:39,879 INFO L428 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:39,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:39,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1120833564, now seen corresponding path program 142 times [2021-02-19 18:32:39,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:39,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940308878] [2021-02-19 18:32:39,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:39,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:40,599 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:40,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940308878] [2021-02-19 18:32:40,600 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486883706] [2021-02-19 18:32:40,600 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:40,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:32:40,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:40,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:32:40,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:41,226 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-02-19 18:32:41,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 16 [2021-02-19 18:32:41,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:41,250 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:41,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:41,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:38, output treesize:16 [2021-02-19 18:32:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:41,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:41,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-02-19 18:32:41,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054014156] [2021-02-19 18:32:41,680 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:32:41,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:41,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:32:41,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=829, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:32:41,680 INFO L87 Difference]: Start difference. First operand 1494 states and 3022 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-02-19 18:32:46,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:46,160 INFO L93 Difference]: Finished difference Result 1676 states and 3358 transitions. [2021-02-19 18:32:46,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-02-19 18:32:46,162 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 33 [2021-02-19 18:32:46,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:46,163 INFO L225 Difference]: With dead ends: 1676 [2021-02-19 18:32:46,163 INFO L226 Difference]: Without dead ends: 1604 [2021-02-19 18:32:46,164 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1280 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=426, Invalid=3864, Unknown=0, NotChecked=0, Total=4290 [2021-02-19 18:32:46,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1604 states. [2021-02-19 18:32:46,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1604 to 1495. [2021-02-19 18:32:46,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1495 states, 1494 states have (on average 2.0240963855421685) internal successors, (3024), 1494 states have internal predecessors, (3024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:46,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1495 states to 1495 states and 3024 transitions. [2021-02-19 18:32:46,175 INFO L78 Accepts]: Start accepts. Automaton has 1495 states and 3024 transitions. Word has length 33 [2021-02-19 18:32:46,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:46,175 INFO L480 AbstractCegarLoop]: Abstraction has 1495 states and 3024 transitions. [2021-02-19 18:32:46,175 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-02-19 18:32:46,176 INFO L276 IsEmpty]: Start isEmpty. Operand 1495 states and 3024 transitions. [2021-02-19 18:32:46,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-02-19 18:32:46,177 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:46,177 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:46,378 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable175 [2021-02-19 18:32:46,378 INFO L428 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:46,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:46,378 INFO L82 PathProgramCache]: Analyzing trace with hash -1747891366, now seen corresponding path program 143 times [2021-02-19 18:32:46,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:46,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474663702] [2021-02-19 18:32:46,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:46,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:47,120 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 1 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:47,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474663702] [2021-02-19 18:32:47,120 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [920653834] [2021-02-19 18:32:47,120 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:47,139 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-02-19 18:32:47,139 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:47,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 34 conjunts are in the unsatisfiable core [2021-02-19 18:32:47,140 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:47,728 INFO L354 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2021-02-19 18:32:47,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 16 [2021-02-19 18:32:47,732 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:47,747 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:47,749 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:47,749 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:42, output treesize:16 [2021-02-19 18:32:48,165 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:48,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:48,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 30 [2021-02-19 18:32:48,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74708674] [2021-02-19 18:32:48,165 INFO L460 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-02-19 18:32:48,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:48,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-02-19 18:32:48,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-02-19 18:32:48,166 INFO L87 Difference]: Start difference. First operand 1495 states and 3024 transitions. Second operand has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-02-19 18:32:53,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:53,507 INFO L93 Difference]: Finished difference Result 1714 states and 3440 transitions. [2021-02-19 18:32:53,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-02-19 18:32:53,509 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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 33 [2021-02-19 18:32:53,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:53,510 INFO L225 Difference]: With dead ends: 1714 [2021-02-19 18:32:53,510 INFO L226 Difference]: Without dead ends: 1652 [2021-02-19 18:32:53,511 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 19 SyntacticMatches, 3 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1608 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=542, Invalid=4714, Unknown=0, NotChecked=0, Total=5256 [2021-02-19 18:32:53,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1652 states. [2021-02-19 18:32:53,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1652 to 1462. [2021-02-19 18:32:53,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1462 states, 1461 states have (on average 2.027378507871321) internal successors, (2962), 1461 states have internal predecessors, (2962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:53,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1462 states to 1462 states and 2962 transitions. [2021-02-19 18:32:53,524 INFO L78 Accepts]: Start accepts. Automaton has 1462 states and 2962 transitions. Word has length 33 [2021-02-19 18:32:53,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:53,524 INFO L480 AbstractCegarLoop]: Abstraction has 1462 states and 2962 transitions. [2021-02-19 18:32:53,524 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 1.967741935483871) internal successors, (61), 30 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) [2021-02-19 18:32:53,524 INFO L276 IsEmpty]: Start isEmpty. Operand 1462 states and 2962 transitions. [2021-02-19 18:32:53,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-02-19 18:32:53,525 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:53,525 INFO L506 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:53,725 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 146 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2021-02-19 18:32:53,726 INFO L428 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:53,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:53,726 INFO L82 PathProgramCache]: Analyzing trace with hash -957432015, now seen corresponding path program 144 times [2021-02-19 18:32:53,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:53,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785942272] [2021-02-19 18:32:53,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:53,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:53,849 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785942272] [2021-02-19 18:32:53,849 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100300831] [2021-02-19 18:32:53,849 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:53,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-02-19 18:32:53,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:53,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 18 conjunts are in the unsatisfiable core [2021-02-19 18:32:53,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:54,316 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:32:54,317 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 13 treesize of output 7 [2021-02-19 18:32:54,320 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:54,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:54,334 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:54,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:23, output treesize:3 [2021-02-19 18:32:54,398 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:54,398 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:54,398 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-02-19 18:32:54,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491196624] [2021-02-19 18:32:54,398 INFO L460 AbstractCegarLoop]: Interpolant automaton has 15 states [2021-02-19 18:32:54,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:54,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-02-19 18:32:54,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=178, Unknown=0, NotChecked=0, Total=210 [2021-02-19 18:32:54,399 INFO L87 Difference]: Start difference. First operand 1462 states and 2962 transitions. Second operand has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-02-19 18:32:55,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:55,632 INFO L93 Difference]: Finished difference Result 1948 states and 3909 transitions. [2021-02-19 18:32:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-02-19 18:32:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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 36 [2021-02-19 18:32:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:55,635 INFO L225 Difference]: With dead ends: 1948 [2021-02-19 18:32:55,635 INFO L226 Difference]: Without dead ends: 1945 [2021-02-19 18:32:55,636 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=250, Invalid=1010, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:32:55,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1945 states. [2021-02-19 18:32:55,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1945 to 1350. [2021-02-19 18:32:55,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1350 states, 1349 states have (on average 2.0148257968865826) internal successors, (2718), 1349 states have internal predecessors, (2718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:55,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1350 states to 1350 states and 2718 transitions. [2021-02-19 18:32:55,647 INFO L78 Accepts]: Start accepts. Automaton has 1350 states and 2718 transitions. Word has length 36 [2021-02-19 18:32:55,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:55,647 INFO L480 AbstractCegarLoop]: Abstraction has 1350 states and 2718 transitions. [2021-02-19 18:32:55,647 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 15 states, 15 states have (on average 3.7333333333333334) internal successors, (56), 14 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) [2021-02-19 18:32:55,647 INFO L276 IsEmpty]: Start isEmpty. Operand 1350 states and 2718 transitions. [2021-02-19 18:32:55,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-02-19 18:32:55,648 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:55,648 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:55,848 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2021-02-19 18:32:55,848 INFO L428 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:55,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:55,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1113543301, now seen corresponding path program 145 times [2021-02-19 18:32:55,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:55,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024842162] [2021-02-19 18:32:55,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:55,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:55,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024842162] [2021-02-19 18:32:55,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279514028] [2021-02-19 18:32:55,930 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:55,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:55,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 8 conjunts are in the unsatisfiable core [2021-02-19 18:32:55,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:56,171 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 28 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:56,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:56,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-02-19 18:32:56,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710825724] [2021-02-19 18:32:56,171 INFO L460 AbstractCegarLoop]: Interpolant automaton has 7 states [2021-02-19 18:32:56,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:56,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-02-19 18:32:56,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:32:56,172 INFO L87 Difference]: Start difference. First operand 1350 states and 2718 transitions. Second operand has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-02-19 18:32:56,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:32:56,222 INFO L93 Difference]: Finished difference Result 1454 states and 2886 transitions. [2021-02-19 18:32:56,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-02-19 18:32:56,224 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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 37 [2021-02-19 18:32:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:32:56,226 INFO L225 Difference]: With dead ends: 1454 [2021-02-19 18:32:56,226 INFO L226 Difference]: Without dead ends: 1399 [2021-02-19 18:32:56,226 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-02-19 18:32:56,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1399 states. [2021-02-19 18:32:56,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1399 to 1357. [2021-02-19 18:32:56,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1357 states, 1356 states have (on average 2.0088495575221237) internal successors, (2724), 1356 states have internal predecessors, (2724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:32:56,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1357 states to 1357 states and 2724 transitions. [2021-02-19 18:32:56,236 INFO L78 Accepts]: Start accepts. Automaton has 1357 states and 2724 transitions. Word has length 37 [2021-02-19 18:32:56,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:32:56,236 INFO L480 AbstractCegarLoop]: Abstraction has 1357 states and 2724 transitions. [2021-02-19 18:32:56,236 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 7 states, 7 states have (on average 6.142857142857143) internal successors, (43), 6 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) [2021-02-19 18:32:56,236 INFO L276 IsEmpty]: Start isEmpty. Operand 1357 states and 2724 transitions. [2021-02-19 18:32:56,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 18:32:56,237 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:32:56,238 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:32:56,438 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:56,438 INFO L428 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:32:56,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:32:56,438 INFO L82 PathProgramCache]: Analyzing trace with hash -760542770, now seen corresponding path program 146 times [2021-02-19 18:32:56,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:32:56,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478189213] [2021-02-19 18:32:56,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:32:56,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:32:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:57,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478189213] [2021-02-19 18:32:57,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270487745] [2021-02-19 18:32:57,520 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:32:57,540 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-02-19 18:32:57,540 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:32:57,541 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:32:57,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:32:58,287 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-02-19 18:32:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-02-19 18:32:58,291 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:32:58,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:32:58,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:32:58,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-02-19 18:32:58,719 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:32:58,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:32:58,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 33 [2021-02-19 18:32:58,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095591334] [2021-02-19 18:32:58,720 INFO L460 AbstractCegarLoop]: Interpolant automaton has 34 states [2021-02-19 18:32:58,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:32:58,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-02-19 18:32:58,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1031, Unknown=0, NotChecked=0, Total=1122 [2021-02-19 18:32:58,720 INFO L87 Difference]: Start difference. First operand 1357 states and 2724 transitions. Second operand has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:02,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:02,890 INFO L93 Difference]: Finished difference Result 1551 states and 3062 transitions. [2021-02-19 18:33:02,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-02-19 18:33:02,893 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-02-19 18:33:02,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:02,894 INFO L225 Difference]: With dead ends: 1551 [2021-02-19 18:33:02,894 INFO L226 Difference]: Without dead ends: 1487 [2021-02-19 18:33:02,895 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 5 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=221, Invalid=2749, Unknown=0, NotChecked=0, Total=2970 [2021-02-19 18:33:02,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1487 states. [2021-02-19 18:33:02,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1487 to 1374. [2021-02-19 18:33:02,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1374 states, 1373 states have (on average 2.0043699927166787) internal successors, (2752), 1373 states have internal predecessors, (2752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:02,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1374 states to 1374 states and 2752 transitions. [2021-02-19 18:33:02,905 INFO L78 Accepts]: Start accepts. Automaton has 1374 states and 2752 transitions. Word has length 40 [2021-02-19 18:33:02,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:02,905 INFO L480 AbstractCegarLoop]: Abstraction has 1374 states and 2752 transitions. [2021-02-19 18:33:02,905 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 34 states, 34 states have (on average 1.8235294117647058) internal successors, (62), 33 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:02,905 INFO L276 IsEmpty]: Start isEmpty. Operand 1374 states and 2752 transitions. [2021-02-19 18:33:02,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 18:33:02,906 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:02,906 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:03,106 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:03,107 INFO L428 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:03,107 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:03,107 INFO L82 PathProgramCache]: Analyzing trace with hash -1821635828, now seen corresponding path program 147 times [2021-02-19 18:33:03,107 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:03,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824948679] [2021-02-19 18:33:03,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:03,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:04,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824948679] [2021-02-19 18:33:04,214 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958315765] [2021-02-19 18:33:04,214 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 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:04,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-02-19 18:33:04,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:04,236 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 48 conjunts are in the unsatisfiable core [2021-02-19 18:33:04,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:05,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,553 INFO L173 IndexEqualityManager]: detected equality via solver [2021-02-19 18:33:05,555 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-02-19 18:33:05,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 18 [2021-02-19 18:33:05,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:05,580 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:05,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:05,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:56, output treesize:13 [2021-02-19 18:33:05,987 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:05,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:05,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21] total 37 [2021-02-19 18:33:05,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074801207] [2021-02-19 18:33:05,988 INFO L460 AbstractCegarLoop]: Interpolant automaton has 38 states [2021-02-19 18:33:05,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:05,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-02-19 18:33:05,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1300, Unknown=0, NotChecked=0, Total=1406 [2021-02-19 18:33:05,988 INFO L87 Difference]: Start difference. First operand 1374 states and 2752 transitions. Second operand has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:11,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:11,409 INFO L93 Difference]: Finished difference Result 1579 states and 3117 transitions. [2021-02-19 18:33:11,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-02-19 18:33:11,411 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-02-19 18:33:11,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:11,412 INFO L225 Difference]: With dead ends: 1579 [2021-02-19 18:33:11,412 INFO L226 Difference]: Without dead ends: 1515 [2021-02-19 18:33:11,412 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=313, Invalid=3847, Unknown=0, NotChecked=0, Total=4160 [2021-02-19 18:33:11,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1515 states. [2021-02-19 18:33:11,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1515 to 1380. [2021-02-19 18:33:11,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1380 states, 1379 states have (on average 2.0065264684554025) internal successors, (2767), 1379 states have internal predecessors, (2767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:11,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1380 states to 1380 states and 2767 transitions. [2021-02-19 18:33:11,422 INFO L78 Accepts]: Start accepts. Automaton has 1380 states and 2767 transitions. Word has length 40 [2021-02-19 18:33:11,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:11,422 INFO L480 AbstractCegarLoop]: Abstraction has 1380 states and 2767 transitions. [2021-02-19 18:33:11,422 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 38 states, 38 states have (on average 1.8157894736842106) internal successors, (69), 37 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:11,422 INFO L276 IsEmpty]: Start isEmpty. Operand 1380 states and 2767 transitions. [2021-02-19 18:33:11,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 18:33:11,423 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:11,423 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:11,623 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2021-02-19 18:33:11,624 INFO L428 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:11,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:11,624 INFO L82 PathProgramCache]: Analyzing trace with hash 794756046, now seen corresponding path program 148 times [2021-02-19 18:33:11,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:11,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444291732] [2021-02-19 18:33:11,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:11,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-02-19 18:33:12,597 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444291732] [2021-02-19 18:33:12,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654663571] [2021-02-19 18:33:12,597 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:12,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-02-19 18:33:12,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-02-19 18:33:12,617 WARN L261 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 46 conjunts are in the unsatisfiable core [2021-02-19 18:33:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-02-19 18:33:13,444 INFO L354 Elim1Store]: treesize reduction 36, result has 2.7 percent of original size [2021-02-19 18:33:13,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 42 treesize of output 18 [2021-02-19 18:33:13,447 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-02-19 18:33:13,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-02-19 18:33:13,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-02-19 18:33:13,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:48, output treesize:13 [2021-02-19 18:33:13,816 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-02-19 18:33:13,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-02-19 18:33:13,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 20] total 35 [2021-02-19 18:33:13,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921139483] [2021-02-19 18:33:13,816 INFO L460 AbstractCegarLoop]: Interpolant automaton has 36 states [2021-02-19 18:33:13,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-02-19 18:33:13,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-02-19 18:33:13,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1163, Unknown=0, NotChecked=0, Total=1260 [2021-02-19 18:33:13,817 INFO L87 Difference]: Start difference. First operand 1380 states and 2767 transitions. Second operand has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:18,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-02-19 18:33:18,373 INFO L93 Difference]: Finished difference Result 1604 states and 3165 transitions. [2021-02-19 18:33:18,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-02-19 18:33:18,375 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-02-19 18:33:18,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-02-19 18:33:18,377 INFO L225 Difference]: With dead ends: 1604 [2021-02-19 18:33:18,377 INFO L226 Difference]: Without dead ends: 1540 [2021-02-19 18:33:18,377 INFO L762 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 5 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 712 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=242, Invalid=3064, Unknown=0, NotChecked=0, Total=3306 [2021-02-19 18:33:18,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1540 states. [2021-02-19 18:33:18,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1540 to 1381. [2021-02-19 18:33:18,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1381 states, 1380 states have (on average 2.006521739130435) internal successors, (2769), 1380 states have internal predecessors, (2769), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:18,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1381 states to 1381 states and 2769 transitions. [2021-02-19 18:33:18,387 INFO L78 Accepts]: Start accepts. Automaton has 1381 states and 2769 transitions. Word has length 40 [2021-02-19 18:33:18,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-02-19 18:33:18,387 INFO L480 AbstractCegarLoop]: Abstraction has 1381 states and 2769 transitions. [2021-02-19 18:33:18,387 INFO L481 AbstractCegarLoop]: Interpolant automaton has has 36 states, 36 states have (on average 1.9166666666666667) internal successors, (69), 35 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-02-19 18:33:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 1381 states and 2769 transitions. [2021-02-19 18:33:18,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-02-19 18:33:18,388 INFO L498 BasicCegarLoop]: Found error trace [2021-02-19 18:33:18,388 INFO L506 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-02-19 18:33:18,588 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-02-19 18:33:18,589 INFO L428 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-02-19 18:33:18,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-02-19 18:33:18,589 INFO L82 PathProgramCache]: Analyzing trace with hash 1208590604, now seen corresponding path program 149 times [2021-02-19 18:33:18,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-02-19 18:33:18,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1943277671] [2021-02-19 18:33:18,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-02-19 18:33:18,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-02-19 18:33:18,904 WARN L517 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2021-02-19 18:33:18,904 WARN L545 AbstractCegarLoop]: Verification canceled [2021-02-19 18:33:18,907 WARN L224 ceAbstractionStarter]: Timeout [2021-02-19 18:33:18,907 INFO L202 PluginConnector]: Adding new model queue-add-2.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 19.02 06:33:18 BasicIcfg [2021-02-19 18:33:18,907 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-02-19 18:33:18,907 INFO L168 Benchmark]: Toolchain (without parser) took 521071.54 ms. Allocated memory was 255.9 MB in the beginning and 503.3 MB in the end (delta: 247.5 MB). Free memory was 236.6 MB in the beginning and 252.6 MB in the end (delta: -16.0 MB). Peak memory consumption was 233.0 MB. Max. memory is 16.0 GB. [2021-02-19 18:33:18,907 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.11 ms. Allocated memory is still 255.9 MB. Free memory is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2021-02-19 18:33:18,907 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:33:18,907 INFO L168 Benchmark]: Boogie Preprocessor took 13.21 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 906.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:33:18,907 INFO L168 Benchmark]: RCFGBuilder took 307.81 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.3 MB in the end (delta: -2.6 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. [2021-02-19 18:33:18,908 INFO L168 Benchmark]: TraceAbstraction took 520719.24 ms. Allocated memory was 255.9 MB in the beginning and 503.3 MB in the end (delta: 247.5 MB). Free memory was 235.6 MB in the beginning and 252.6 MB in the end (delta: -17.0 MB). Peak memory consumption was 230.1 MB. Max. memory is 16.0 GB. [2021-02-19 18:33:18,908 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 is still 237.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.42 ms. Allocated memory is still 255.9 MB. Free memory was 236.0 MB in the beginning and 234.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 13.21 ms. Allocated memory is still 255.9 MB. Free memory was 234.5 MB in the beginning and 233.6 MB in the end (delta: 906.4 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 307.81 ms. Allocated memory is still 255.9 MB. Free memory was 233.6 MB in the beginning and 236.3 MB in the end (delta: -2.6 MB). Peak memory consumption was 17.5 MB. Max. memory is 16.0 GB. * TraceAbstraction took 520719.24 ms. Allocated memory was 255.9 MB in the beginning and 503.3 MB in the end (delta: 247.5 MB). Free memory was 235.6 MB in the beginning and 252.6 MB in the end (delta: -17.0 MB). Peak memory consumption was 230.1 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that assertion always holds (line 59). Cancelled while BasicCegarLoop was analyzing trace of length 41 with TraceHistMax 4,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateComparison was comparing new predicate (quantifier-free) to 12 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 25 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 520.5s, OverallIterations: 153, TraceHistogramMax: 4, AutomataDifference: 345.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 7460 SDtfs, 22624 SDslu, 94218 SDs, 0 SdLazy, 204238 SolverSat, 10161 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 84.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11626 GetRequests, 2881 SyntacticMatches, 381 SemanticMatches, 8364 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150159 ImplicationChecksByTransitivity, 291.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=1988occurred in iteration=136, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.4s AutomataMinimizationTime, 152 MinimizatonAttempts, 23880 StatesRemovedByMinimization, 151 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 137.6s InterpolantComputationTime, 9639 NumberOfCodeBlocks, 9639 NumberOfCodeBlocksAsserted, 474 NumberOfCheckSat, 9337 ConstructedInterpolants, 487 QuantifiedInterpolants, 4582343 SizeOfPredicates, 1269 NumberOfNonLiveVariables, 10605 ConjunctsInSsa, 4744 ConjunctsInUnsatCore, 302 InterpolantComputations, 2 PerfectInterpolantSequences, 100/5549 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